Why did Yamaha paint the heads but not the cylinders? On all of my older sleds, I have removed the engines and completely primed and painted the cyl's and crankcases. The engines, in my opinion, look better completely painted. Allan
staggs65
Moderator
yeah i was contemplating painting my engine, didn't know if it would affect heat transfer or anything though, any thoughts
Cost???? And maybe heat transfer. But I would bet it is mostly cost and profits for the corp.
I think they didn't paint them not only because of cost but also to match what was the "Norm" trend for sleds. My RZ500 street bike[liquid V4 2 stroke] had painted cylinders as did the RZ400...
valin
Active member
Cat's had painted cylinders........
they dont do bc of heat had some cylinders replated and and sand blasted the inside and out and i asked why the said heat it will keep the motor run cooler thats what i got out of it
linemech31
New member
At the end of the day i bet it came down to money. But im sure there is a few deg's to be lost by not painting
OnDaTrail
New member
It actually depends on the emmisivity of the paint. Some reduce heat transfer and others increase it based on how their emmisivity numbers compare to the bare surface. BORING!!!
valin said:
And we all know how reliable they have been! LOL
It is just nuts to not paint the cyl's and crankcase, the bare aluminum corrodes just from the air, and if you travel on an open trailer the road salt is terrible. I am lucky I now have an enclosed trailer but I went for years without. I am now planning on pulling the Viper engine and repainting. I think a painted engine just looks finished. Al
