ORIGINAL: Hobbsy
Obviously you guys went to a better school than the Saito engineers. The pushrods probably run hotter than the cylinder since they are protected from the airflow and get heat from both ends, especially from the the exhaust rocker.
Guys grpie becdause OS fourstrokes don't come with tols so I'm sure they would gripe if Saitos didn't
What are you talking about?
Saito engineers recommend .00157" valve lash. They send maximum valve lash feeler guages for the "Primitive Petes" that would probably have a hard time setting valve lash to their minimum recommendations.
If you want to set your valve lash @ the maximum recomended spec, then good for you.
If you think a pusrod that is in front of the cylinder gets hotter than a casting that is containing combustion I would like to know how that heat is migrating from the hottest part of the engine & picking up more heat in the prop wash.
Through the exhaust rocker? I'm sorry, but that thinking is just plain ludecrous. IMO
It can't possibly be hotter, & even if it is the same temperature, aluminum expands a lot more than steel @ ANY given temperature.
If those guys that gripe because of a $10 savings due to the elimination of redundant tools (for those of us that already own Saito engines) would just take that savings & buy a tool kit as an accessory, they would them be happy when they buy their 2nd Saito engine & pocket the $10 savings.