Air filter replacement / velocity stacks and replacing plug wires

[Scott griffith]

Hey guys looking at replacing my air filters anybody got ideas on what's best for direct replacement does kn make one thanks

 

[ISLANDRACING]

http://islandracing.net/212230232.html

The Prok then the R&D are the most economical

 

[Scott griffith]

Ok thanks

 

[Bruce]

@Scott griffith, do you have rectangular air filters under a cover on top of the engines or round canisters?

 

[Scott griffith]

The rectangle on the top

 

[Bruce]

The rectangle on the top

Do you have HO engines? I am not sure if they were available in 2003.

R&D and RIVA both make velocity stacks and air filters that are known to increase horsepower a little on the HO engines.

I found the best prices for the the R&D parts for the Yamaha FX140 engine on EBay. The velocity stack is 206-00140 and the air filter is 200-00143.

 

[atldude]

Do you have HO engines? I am not sure if they were available in 2003.

R&D and RIVA both make velocity stacks and air filters that are known to increase horsepower a little on the HO engines.

I found the best prices for the the R&D parts for the Yamaha FX140 engine on EBay. The velocity stack is 206-00140 and the air filter is 200-00143.

What sort of hp increase can the velocity stacks/filter combo achieve?

 

[Bruce]

What sort of hp increase can the velocity stacks/filter combo achieve?

Island Racing (http://islandracing.net/212230232.html) says "The R&D high flow breather is a direct replacement for the stock breather in the OEM air box. Water tested to deliver improved throttle response, acceleration and top speed with 50-100 RPM increase. Units with 15-20+ operational hours may see greater performance increases.".

 

[Speedling]

What sort of hp increase can the velocity stacks/filter combo achieve?

I have velocity stacks and the filters removed (most of the time) and they made a very slight difference. Noticeable, but slight.

 

[DCB-270]

I have velocity stacks and R &D filters. Slight increase.

 

[Scott griffith]

Thanks guys for all the help I was thinkn abt the r&d are the wash able and reuse able does anybody know if k&n makes any

 

[Scott griffith]

Has anyone very changed the plug wires on there boats and has anybody ever made there own velocity stacks before

 

[Scott griffith]

Hey guys a changed the title of the tread to see if anybody had any opinions on changing plug wires or making your own velocity stacks

 

[DCB-270]

This guy does wires for the two strokes. Not sure about the four strokes http://www.jetskisolutions.com/index.html

 

[Scott griffith]

Thanks I will check them out

 

[Speedling]

Why make your own velocity stacks?