04-03-2015, 08:33 AM
(04-02-2015, 02:02 PM)Ghis_imp Wrote: Any issues with clutch slippage on full synthetic. Two dealers are telling me that they only put the 10W30 full synthetic in their motocross bike, but not the road bikes. They both encouraged me to use semi-synthetic oil. Of course you have to go to a different brand than Honda for that. Might just go back to regular Honda 10W30 and see if it gets back to normal as it was before the 600 miles service when the dealer put in the 10W40...
This mixes two different issues. The clutch slippage issues happen if you use oil that has excessive friction modifiers (typically found in car oils). This can happen with both mineral and synthetic oils. What you want is an oil that complies with the JASO-MA specification. That ensures that the oil does not contain friction modifiers that will affect a motorcycle wet clutch. You can find both synthetic and mineral oils that meet the JASO-MA spec and either will be fine for your wet clutch.