Switching to synthetic oil...

[dBuster_imp]

With my old 1980 Yamaha XS850 it did not like synthetic. The clutch would slip like crazy when running synthetic and once I went back to conventional all was fine again.

So why would one not run synthetic, there is a good reason there.

But then again, not all bikes are created the same and even though they have the same model number and are made the same they are all unique.