Crash Cash
Well-known member
Well, I can say my old Gen-I SV-650 sure as hell didn't like "energy-conserving" oil! I put it in, and the clutch slipped like hell. I spent a couple hundred miles like that and changed back to Rotella T, and after another 100 miles, it stopped slipping. Just my experience.Although I would no sooner run oil spec'ed for autos in a bike than I would run tires spec'ed for autos on a bike, I know guys who do both with seemingly minimal consequences. Their motivation is convenience, and saving money.
The major advantage of the "non-unit" construction is a much lighter weight/sturdier/quieter primary drive. You can have a gear drive right off the end of the crank. With "unit" construction where the transmission's in its own case & oil, you need some sort of belt or chain drive from the crank to the input shaft. That's why Harleys have the huge side cover for the primary drive. On the good side, if the transmission goes south for any reason, you just unbolt it, instead of having to split the engine cases.