Aviti - H1R will make an engine run hotter if you switch to it without richening the mixture. H1R does not burn like other oils and so it will require a slightly larger fuel load. This is common sense any time you switch oils or mixes anyway so it should be no news. H1R does not run hotter than any other oil when tuning is correct.

Diablo - As far as the SAE - well they are light years behind the tuners. They do what is OK for the masses and what is least likely to get the manufacturer into a liability situation. If any of us racers used the SAE guidelines we'd all be in last place every time. Data suggests that on Harley's the ring seating works as I mentioned. Common sense says NOT to do that with your DA or you're going to be buying $400 worth of cylinders!


I baby the crap out of my RC engines... pound for pound they are 5X the cost of a good racing engine!

DP