2022 AR190 Riva Maptuner has anyone done one and was it worth it? Can not find any info on it.

[turbocrazy]

I have a 2022 AR190 that I bought new. I decided to do some upgrades this year. I have ordered a Ribbon delete, Riva power filter kit. Was looking at the Riva Maptuner and I couldn't find anyone that has installed one on a AR190. Just curious if it is worth it or not. I am also searching for feed back on the Lucky 13 cone. I see it a lot on older models pre 2019, but didn't see any information on post 2019. All and all I love the boat and not looking to sell and get a AR195. I am looking for a little more top end. I understand I will not make any great gains, but looking for just a little extra. Twin impeller? any suggestions and real world experience would be awesome. If I could get this thing to get to 40-43 would be great. I do understand weight distribution as well. Fastest I have seen is 36. I live in Tulsa Oklahoma, so roughly 700ft above sea level.

 

[FSH 210 Sport]

I have a 2022 AR190 that I bought new. I decided to do some upgrades this year. I have ordered a Ribbon delete, Riva power filter kit. Was looking at the Riva Maptuner and I couldn't find anyone that has installed one on a AR190. Just curious if it is worth it or not. I am also searching for feed back on the Lucky 13 cone. I see it a lot on older models pre 2019, but didn't see any information on post 2019. All and all I love the boat and not looking to sell and get a AR195. I am looking for a little more top end. I understand I will not make any great gains, but looking for just a little extra. Twin impeller? any suggestions and real world experience would be awesome. If I could get this thing to get to 40-43 would be great. I do understand weight distribution as well. Fastest I have seen is 36. I live in Tulsa Oklahoma, so roughly 700ft above sea level.

My friend is in Tulsa and is boating on Keystone, he has a 255XD.

What are you using the boat for?

Are you getting maximum rpms? That is the first question. Because if you’re not getting full rpms then you need to have a bit of pitch removed from the impeller to get it to max rpm. Try going out and make some speed runs with the oem paper element installed, then pull the oem filer and make a few more speed runs, up wind and down wind. In my boat I picked up 150-200 rpms with the oem filter removed and had the same performance with the riva K&N style filter.

Are you running 86 octane fuel?

The twin screw impellers provide a great level of performance in the ability to stay hooked up and not cavitate.

The only way the map tuner achieves the bigger gains is to use an impeller with less pitch to allow the engine to rev higher when the tune raises the rev limiter, and that lower pitch impeller will have more cavitation on the hole shot, unless you get the twin screw impellers for that application.

I don’t think you’ll be able to pick up 7 mph but you can probably perk things up a bit with the riva air filter and a little less pitch on the impeller.

 

[turbocrazy]

My friend is in Tulsa and is boating on Keystone, he has a 255XD.

What are you using the boat for?

Are you getting maximum rpms? That is the first question. Because if you’re not getting full rpms then you need to have a bit of pitch removed from the impeller to get it to max rpm. Try going out and make some speed runs with the oem paper element installed, then pull the oem filer and make a few more speed runs, up wind and down wind. In my boat I picked up 150-200 rpms with the oem filter removed and had the same performance with the riva K&N style filter.

Are you running 86 octane fuel?

The twin screw impellers provide a great level of performance in the ability to stay hooked up and not cavitate.

The only way the map tuner achieves the bigger gains is to use an impeller with less pitch to allow the engine to rev higher when the tune raises the rev limiter, and that lower pitch impeller will have more cavitation on the hole shot, unless you get the twin screw impellers for that application.

I don’t think you’ll be able to pick up 7 mph but you can probably perk things up a bit with the riva air filter and a little less pitch on the impeller.

Hello, and thank you. I am on Keystone as well. I know my RPM's are off at the moment. This past weekend I was only at 6700. I also was hearing some pinging that I hadn't heard before, so I ordered a new wear ring for it just in case. We sucked a turtle of all things into it year before last. I plan on pulling it apart once the parts show up, Just hope the impeller isn't hurt, but if it was I want to upgrade, if possible. I own Fathead's and we repair boats. As far as upgrading I have not went down the rabbit hole on one before. Pulling the filter, not sure why I didn't think of that, just to see what if any difference that would make. I may do that first just to see and then install the Riva filter kit. I plan on documenting the whole thing.

We use the boat for pleasure cruising. We rarely ski or pull a tube.

 

[Rinker2Yamaha24]

I have a 2021 AR190 - 1.8 (I'm in Raleigh, NC). So 216ft above sea level on my lake. I have Hydrophase installed and I have only seen 38.1 MPH on the hydrophase (GPS) and 40 on the paddlewheel AR190 speedo. At 7492 RPMs. I can't get it past 7500 RPM. Cooler morning in the middle of May. I feel the ribbon delete helped more when we were surfing than anything - wasn't anything crazy.

 

[FSH 210 Sport]

Hello, and thank you. I am on Keystone as well. I know my RPM's are off at the moment. This past weekend I was only at 6700. I also was hearing some pinging that I hadn't heard before, so I ordered a new wear ring for it just in case. We sucked a turtle of all things into it year before last. I plan on pulling it apart once the parts show up, Just hope the impeller isn't hurt, but if it was I want to upgrade, if possible. I own Fathead's and we repair boats. As far as upgrading I have not went down the rabbit hole on one before. Pulling the filter, not sure why I didn't think of that, just to see what if any difference that would make. I may do that first just to see and then install the Riva filter kit. I plan on documenting the whole thing.

We use the boat for pleasure cruising. We rarely ski or pull a tube.

Okay, thanks for the prompt reply and the information. There’s quite a few Yamaha’s out there on Keystone.

You are down about 800 rpm, that is pretty huge. Since you’ve owned the boat since new, did it used to rev higher than that? It can get really humid there in summer, and that will rob your engine of power as it increases the density altitude, right now at 80*, baro 29.92 and dew point of 70*, that puts you at 2500’ of density altitude, or about a 7% hp loss.

The engine makes peak power around 7500 rpm, so if you’re not close to the 7500 rpm mark you’re sacrificing a fair amount of power, add that onto the density altitude and you’re getting a bit of a double whammy performance wise. So getting the rpm’s up to peak level is paramount. Don’t worry about the speed, just get the rpms up to rated rpm, nothing much else matters.

I was talking to Dave at leading edge impellers last year and he told me how much improvement he felt with the twin screw impeller, they are pricey though. Make sure your impeller and wear ring are in good shape and that the gap between the two is correct, then give Dave a call and chat him up about what is going on with your boat and he will get you dialed in. My suggestion would be to get another impeller and have it pitched, that way you will not be without an impeller and by extension your boat, then if you have to send the impeller back for some fine tuning you can put your oem impeller in.

The lucky 13 cones from everything I’ve read on there are for fine tuning the impeller performance for hole shot and do not affect top speed very much at all.

As far as speed goes, is the hull clean? How much gear or weight is in the boat all the time? Weight is the main thing that pulls the speed down in these boats.

Pinging? Can you clarify? Do you think it was from the engine or the jet pump? How old and what type of gas was in the tank? Ethanol laced or non ethanol?

A turtle eh? That sounds ugly. Did you give the impeller and wear ring a visual inspection from below? A damaged impeller will not bring the engine speed down usually, a damaged impeller usually cavitates and causes less load in the jet pump and the engine will rev higher.

 

[turbocrazy]

Okay, thanks for the prompt reply and the information. There’s quite a few Yamaha’s out there on Keystone.

You are down about 800 rpm, that is pretty huge. Since you’ve owned the boat since new, did it used to rev higher than that? It can get really humid there in summer, and that will rob your engine of power as it increases the density altitude, right now at 80*, baro 29.92 and dew point of 70*, that puts you at 2500’ of density altitude, or about a 7% hp loss.

The engine makes peak power around 7500 rpm, so if you’re not close to the 7500 rpm mark you’re sacrificing a fair amount of power, add that onto the density altitude and you’re getting a bit of a double whammy performance wise. So getting the rpm’s up to peak level is paramount. Don’t worry about the speed, just get the rpms up to rated rpm, nothing much else matters.

I was talking to Dave at leading edge impellers last year and he told me how much improvement he felt with the twin screw impeller, they are pricey though. Make sure your impeller and wear ring are in good shape and that the gap between the two is correct, then give Dave a call and chat him up about what is going on with your boat and he will get you dialed in. My suggestion would be to get another impeller and have it pitched, that way you will not be without an impeller and by extension your boat, then if you have to send the impeller back for some fine tuning you can put your oem impeller in.

The lucky 13 cones from everything I’ve read on there are for fine tuning the impeller performance for hole shot and do not affect top speed very much at all.

As far as speed goes, is the hull clean? How much gear or weight is in the boat all the time? Weight is the main thing that pulls the speed down in these boats.

Pinging? Can you clarify? Do you think it was from the engine or the jet pump? How old and what type of gas was in the tank? Ethanol laced or non ethanol?

A turtle eh? That sounds ugly. Did you give the impeller and wear ring a visual inspection from below? A damaged impeller will not bring the engine speed down usually, a damaged impeller usually cavitates and causes less load in the jet pump and the engine will rev higher.

Its been so long since I really used the boat. Last year due to flooding we took it out 1 time. I used my SeaArk most of the time, so I can't really remember the RPMs. I agree with you the RPMs are down. The pinging to me sounds as though its the pump. Motor is not making noise. This part I am not concerned with as I plan on taking it apart and inspecting cleaning ect, if impeller is not damaged I may just replace wear ring if needed and put stock impeller in and call Dave get a new one coming with new pitch. I hope to take it out this weekend. The weather here is not favorable at the moment.

From what I have seen the Lucky 13 helps with Cavitation and does not effect top end much meaning loss of speed. I will do the Lucky 13 if it helps with low end without hurting top end. Maybe something I just have to try. I can always take it off.

Boat is spotless, it stays out of the water and is clean.

Gas is fresh gas, nonethanol, 87 octane.

I did email Riva Racing asking about the Tuner and basically won't see any gains other than hole shot, he said impeller repitch. They have not played with the AR190 yet. I will just do a few things to it and see if I can get the RPMs where they need to be and just leave it be LOL. I am happy enough with it, just hard to leave things alone.

 

[FSH 210 Sport]

Its been so long since I really used the boat. Last year due to flooding we took it out 1 time. I used my SeaArk most of the time, so I can't really remember the RPMs. I agree with you the RPMs are down. The pinging to me sounds as though its the pump. Motor is not making noise. This part I am not concerned with as I plan on taking it apart and inspecting cleaning ect, if impeller is not damaged I may just replace wear ring if needed and put stock impeller in and call Dave get a new one coming with new pitch. I hope to take it out this weekend. The weather here is not favorable at the moment.

From what I have seen the Lucky 13 helps with Cavitation and does not effect top end much meaning loss of speed. I will do the Lucky 13 if it helps with low end without hurting top end. Maybe something I just have to try. I can always take it off.

Boat is spotless, it stays out of the water and is clean.

Gas is fresh gas, nonethanol, 87 octane.

I did email Riva Racing asking about the Tuner and basically won't see any gains other than hole shot, he said impeller repitch. They have not played with the AR190 yet. I will just do a few things to it and see if I can get the RPMs where they need to be and just leave it be LOL. I am happy enough with it, just hard to leave things alone.

You will not need to mess with the cones with the twin screw. And, I would not mess with them until you have the impeller health sorted out, you will introduce variables before you have everything correct. As well, its money and time you don’t to invest at this point.

If you have not pulled your pump yet or have checked the grease in the cone then that needs to be done anyway and you will need a couple of O rings for the cone and some EPNOC grease. Check the link in my signature.

If you can, have a look from underneath with a strong light, my fave is the AAA LED mini mag light, super bright, and see if you can see any radial deep scratches in the wear ring, or dings on the impeller blade, or if it is making contact somewhere. Take the boat and enjoy it in the interim.

I hear you about making things better, but I’m also at the point in my life where I like to do my home work and then go and use it a lot.

I was just looking at your weather.. a bit rumpty but I didn’t see any thing severe nor have I gotten any alerts from the channel 6 app that I have. The weatherman has not taken off his jacket and rolled up his sleeves so it’s all good I suppose.

 

[turbocrazy]

You will not need to mess with the cones with the twin screw. And, I would not mess with them until you have the impeller health sorted out, you will introduce variables before you have everything correct. As well, its money and time you don’t to invest at this point.

If you have not pulled your pump yet or have checked the grease in the cone then that needs to be done anyway and you will need a couple of O rings for the cone and some EPNOC grease. Check the link in my signature.

If you can, have a look from underneath with a strong light, my fave is the AAA LED mini mag light, super bright, and see if you can see any radial deep scratches in the wear ring, or dings on the impeller blade, or if it is making contact somewhere. Take the boat and enjoy it in the interim.

I hear you about making things better, but I’m also at the point in my life where I like to do my home work and then go and use it a lot.

I was just looking at your weather.. a bit rumpty but I didn’t see any thing severe nor have I gotten any alerts from the channel 6 app that I have. The weatherman has not taken off his jacket and rolled up his sleeves so it’s all good I suppose.

Yes sir, when I ordered the new wear sleeve I ordered new o'rings. I need to service everything anyways and will not take me much time to pull the pump. Plus peace of mind that everything is as it should be. I did not get down and look into the pump intake. I have a few customer boats to work on before getting to mine, but I will let you know how it looks and what I do to it. I have a few things coming, couple things are cosmetics, SeaDek and a new bimini, Wind storm in 2023 messed it up and never replaced it.

Thank you for all the information. I appreciate it and the recommendation on impeller repitch service, I will reach out to him.

 

[Neutron]

I have a 2022 AR190 that I bought new. I decided to do some upgrades this year. I have ordered a Ribbon delete, Riva power filter kit. Was looking at the Riva Maptuner and I couldn't find anyone that has installed one on a AR190. Just curious if it is worth it or not. I am also searching for feed back on the Lucky 13 cone. I see it a lot on older models pre 2019, but didn't see any information on post 2019. All and all I love the boat and not looking to sell and get a AR195. I am looking for a little more top end. I understand I will not make any great gains, but looking for just a little extra. Twin impeller? any suggestions and real world experience would be awesome. If I could get this thing to get to 40-43 would be great. I do understand weight distribution as well. Fastest I have seen is 36. I live in Tulsa Oklahoma, so roughly 700ft above sea level.

Maptuner for any 1.8na wont be worth the money you spend.
On these boats even with the SVHO there isn't much gains. Its a big chunk of change.
There has been a few guys with the 255 that tuned them but they haven't reported much on their progress.

 

[FSH 210 Sport]

Yes sir, when I ordered the new wear sleeve I ordered new o'rings. I need to service everything anyways and will not take me much time to pull the pump. Plus peace of mind that everything is as it should be. I did not get down and look into the pump intake. I have a few customer boats to work on before getting to mine, but I will let you know how it looks and what I do to it. I have a few things coming, couple things are cosmetics, SeaDek and a new bimini, Wind storm in 2023 messed it up and never replaced it.

Thank you for all the information. I appreciate it and the recommendation on impeller repitch service, I will reach out to him.

Talked to my friend this afternoon .. apparently you just did the service on his 255XD, he said he knows you… all good things to say!

 

[turbocrazy]

Maptuner for any 1.8na wont be worth the money you spend.
On these boats even with the SVHO there isn't much gains. Its a big chunk of change.
There has been a few guys with the 255 that tuned them but they haven't reported much on their progress.

Thank you for the reply and that is what I am seeing. I was hoping to be able to have some small gains, but doesn't look that way. I guess I need to just be happy with the mid 30 mph.

 

[FSH 210 Sport]

Thank you for the reply and that is what I am seeing. I was hoping to be able to have some small gains, but doesn't look that way. I guess I need to just be happy with the mid 30 mph.

I’ve struggled with my boats power as I’m at 5000’ of elevation, and on the hottest summer days the density altitude is around 10,000’ so I’m losing roughly 30% of my hp. On the hottest days my boat would only turn 6700 rpm and do 29 mph. I’ve tested three brands of impellers, and different pitches to try and find the best all around impeller. I’m currently running the OEM impellers pitched by Dave at Leading Edge for high altitude, 7300 rpm (my engines are rated 8000) at 5000’, 7500 rpm at 3200’, and 7800-7900 at 1250’. When I was at 650’ on Lake Michigan I was on the rev limiters, 8000+ rpm, but, I had a lot of reserve power so my boat was a rocket relatively speaking, the speed bleed off was very minimal it would drive through turns and push you into the deck, and top speed was unaffected because top speed is directly proportional to the amount of water being pushed out of the jet pumps.

Think of this exercise like a graph with two points on it, one line is available engine power, the other is jet pump demand power. At lower rpm the gap between available engine power and jet pump demand power is very large and so is the reserve power, as rpm increases this gap starts shrinking and the reserve power becomes less and less until the two points meet due to the increased propeller demand.



Or this graph from Boston Whaler which denotes “extra power available” or reserve power.



As you can see from this Berkeley Jet power demand, increasing the rpm by 1000 rpm from 4000 to 5000 rpm roughly doubles the hp required.



So, the key is to make sure the engine rpms will be at rated rpm at WOT where the engine makes the most power which is usually the max rated rpm since that is where the most air flow is, thus the most fuel can be burned. Then balance the load, via the pitch of the impeller to a point where it is just below the max power of the engine so there is enough reserve power for any given atmospheric conditions / density altitude within the time period of use to maintain peak performance for maximum enjoyment of your boat.

On cold days you might be a bit under propped meaning a bit more reserve power, and on hot days the reserve power will be low, but even on hot days the engines performance will still be perky and accelerate strong up to its top speed. If the boat is propped so that there is little reserve power on cold days then on hot days it will feel sluggish and lazy and the rpms will not top out. Is there a penalty for spinning the engine faster ? Yes, you’ll burn a bit more fuel, but the performance gain is well worth it, my mpg dropped .3 mpg but the speed of my boat increased from 29 to 35-37 mph.

Again, assuming everything is good with your engine, getting the impeller sorted out will make a huge difference in performance on your boat. I’m basing this off of your 6700 rpm experience, just getting the pitch corrected to get your rpm’s up to 7500 will liven things up dramatically. Your boat doesn’t have any reserve power at this point as it is maxed out and only able to achieve 6700 rpm, once the pitch is corrected to allow full rpm you will probably pick up some speed, but when turning at speed the speed will not fall off as badly.

 

[turbocrazy]

I’ve struggled with my boats power as I’m at 5000’ of elevation, and on the hottest summer days the density altitude is around 10,000’ so I’m losing roughly 30% of my hp. On the hottest days my boat would only turn 6700 rpm and do 29 mph. I’ve tested three brands of impellers, and different pitches to try and find the best all around impeller. I’m currently running the OEM impellers pitched by Dave at Leading Edge for high altitude, 7300 rpm (my engines are rated 8000) at 5000’, 7500 rpm at 3200’, and 7800-7900 at 1250’. When I was at 650’ on Lake Michigan I was on the rev limiters, 8000+ rpm, but, I had a lot of reserve power so my boat was a rocket relatively speaking, the speed bleed off was very minimal it would drive through turns and push you into the deck, and top speed was unaffected because top speed is directly proportional to the amount of water being pushed out of the jet pumps.

Think of this exercise like a graph with two points on it, one line is available engine power, the other is jet pump demand power. At lower rpm the gap between available engine power and jet pump demand power is very large and so is the reserve power, as rpm increases this gap starts shrinking and the reserve power becomes less and less until the two points meet due to the increased propeller demand.

View attachment 245864

Or this graph from Boston Whaler which denotes “extra power available” or reserve power.

View attachment 245863

As you can see from this Berkeley Jet power demand, increasing the rpm by 1000 rpm from 4000 to 5000 rpm roughly doubles the hp required.

View attachment 245865

So, the key is to make sure the engine rpms will be at rated rpm at WOT where the engine makes the most power which is usually the max rated rpm since that is where the most air flow is, thus the most fuel can be burned. Then balance the load, via the pitch of the impeller to a point where it is just below the max power of the engine so there is enough reserve power for any given atmospheric conditions / density altitude within the time period of use to maintain peak performance for maximum enjoyment of your boat.

On cold days you might be a bit under propped meaning a bit more reserve power, and on hot days the reserve power will be low, but even on hot days the engines performance will still be perky and accelerate strong up to its top speed. If the boat is propped so that there is little reserve power on cold days then on hot days it will feel sluggish and lazy and the rpms will not top out. Is there a penalty for spinning the engine faster ? Yes, you’ll burn a bit more fuel, but the performance gain is well worth it, my mpg dropped .3 mpg but the speed of my boat increased from 29 to 35-37 mph.

Again, assuming everything is good with your engine, getting the impeller sorted out will make a huge difference in performance on your boat. I’m basing this off of your 6700 rpm experience, just getting the pitch corrected to get your rpm’s up to 7500 will liven things up dramatically. Your boat doesn’t have any reserve power at this point as it is maxed out and only able to achieve 6700 rpm, once the pitch is corrected to allow full rpm you will probably pick up some speed, but when turning at speed the speed will not fall off as badly.

This weekend I took the boat out. I opened the hatch and there was condensation pretty bad. I pulled the filter and low and behold it was damp, I am sure this is the cause of my boat not hitting the correct RPM's, Pulling the filter rpm's stayed around 7279 and 7300. I only seen speed of 34-35 with 34 being the norm. I had myself 263lb and my wife 118lb plus, beach bag and loaded Igloo ice chest.

I have a ribbon delete coming and the performance filter coming from Riva. Not expecting to see much gains from this, from everything I am seeing, but I will see what happens and report back. I am on the fence with doing free flow exhaust. Like I said, hard to leave things alone and Hard to believe you can't get more from these things. my last thing will be the impeller.

 

[Neutron]

This weekend I took the boat out. I opened the hatch and there was condensation pretty bad. I pulled the filter and low and behold it was damp, I am sure this is the cause of my boat not hitting the correct RPM's, Pulling the filter rpm's stayed around 7279 and 7300. I only seen speed of 34-35 with 34 being the norm. I had myself 263lb and my wife 118lb plus, beach bag and loaded Igloo ice chest.

I have a ribbon delete coming and the performance filter coming from Riva. Not expecting to see much gains from this, from everything I am seeing, but I will see what happens and report back. I am on the fence with doing free flow exhaust. Like I said, hard to leave things alone and Hard to believe you can't get more from these things. my last thing will be the impeller.

You will hate yourself with how much louder the free flow exhaust will be with zero gains

 

[Neutron]

Check the clearance of your impeller to the housing. If large enough you might lose top speed. If you hammer the throttle from a no wake speed does it rev then settle

 

[turbocrazy]

Check the clearance of your impeller to the housing. If large enough you might lose top speed. If you hammer the throttle from a no wake speed does it rev then settle

It does, went to 7200 from the start and didn't drop much. I do have a Wear ring on the way, I have not checked it, just ordered one in case. So when I do its here. If I don't use it, it will get used.

Far as the exhaust, I like loud things LOL, grew up with 4 wheelers and always had loud pipes. Same with cars. I figure this would sound like a pissed off mosquito.

Its hard for me to wrap my head around that there is nothing that can be done to these things and I know that there have been so many before me try, and that is why I have asked the questions. I will just keep tinkering around and try things to see what works for me and what doesn't.

 

[FSH 210 Sport]

It does, went to 7200 from the start and didn't drop much. I do have a Wear ring on the way, I have not checked it, just ordered one in case. So when I do its here. If I don't use it, it will get used.

Far as the exhaust, I like loud things LOL, grew up with 4 wheelers and always had loud pipes. Same with cars. I figure this would sound like a pissed off mosquito.

Its hard for me to wrap my head around that there is nothing that can be done to these things and I know that there have been so many before me try, and that is why I have asked the questions. I will just keep tinkering around and try things to see what works for me and what doesn't.

Dunno when the last time you changed your plugs was but given what you just found and the improvement you found I’d make sure it has new properly gapped plugs.

 

[Neutron]

It does, went to 7200 from the start and didn't drop much. I do have a Wear ring on the way, I have not checked it, just ordered one in case. So when I do its here. If I don't use it, it will get used.

Far as the exhaust, I like loud things LOL, grew up with 4 wheelers and always had loud pipes. Same with cars. I figure this would sound like a pissed off mosquito.

Its hard for me to wrap my head around that there is nothing that can be done to these things and I know that there have been so many before me try, and that is why I have asked the questions. I will just keep tinkering around and try things to see what works for me and what doesn't.

So you are most likely losing thrust. You may need a new impeller not the housing. Yamaha housings dont wear like seadoodoos.
I would get a new impeller as well

 

[turbocrazy]

Dunno when the last time you changed your plugs was but given what you just found and the improvement you found I’d make sure it has new properly gapped plugs.

Plugs are good. Wasn't full of water so didn't hydraulic, I assume because of the heat and having the cover on it made everything in the engine bay soaked. Was crazy. I have not had that happen before. Looked like a sauna! I have quite a few parts coming today. So hope to spend a few evenings tinkering with it.

 

[FSH 210 Sport]

It does, went to 7200 from the start and didn't drop much. I do have a Wear ring on the way, I have not checked it, just ordered one in case. So when I do its here. If I don't use it, it will get used.

Far as the exhaust, I like loud things LOL, grew up with 4 wheelers and always had loud pipes. Same with cars. I figure this would sound like a pissed off mosquito.

Its hard for me to wrap my head around that there is nothing that can be done to these things and I know that there have been so many before me try, and that is why I have asked the questions. I will just keep tinkering around and try things to see what works for me and what doesn't.

Did you still only get 34-35 mph?