What are these for???

[Georg]

Here is a great video on the cooling system of the MR-1.

At the :47 mark the intakes are identified. My understanding is that the pee holes will not always be peeing out water. At idle or no wake speeds the impellers do not create enough pressure to vent thru the pee holes. the cooling loop runs thru the system and branches out in 2 locations (5:15 mark). near the jets and these 2 ports.

Once at speeds the pressure is great enough that the pee holes will vent out the side and report back to you they are working.

Please what's for fitting in 6:40?

 

[the MfM]

Please what's for fitting in 6:40?

I think they are the y fittings where the flush ports connect to the cooling system

Part #2 on this IPL

https://www.yamahapartshouse.com/oemparts/a/yam/50039f3cf870021f60a1170d/exhaust-2

 

[Georg]

Thank you for your explanation.