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2015 yz250fx.....as we know the clutch seem to drag considderably on these bikes. Mine did it fron new.... 1st oil change i put in castrol hypuron 15w40... shifting was sometimes difficult and clutch drag was still present...bad enough that nutral was hard to find.. 2nd oil change i put in about 3/4 of a L of yamalube 10w40 ( thats all i had) and toped it up with castrol 20w50 4 stroke motorclcle oil... what a difference it made...smooth shifting...easy nutral and clutch drag is far less .... next try will be with rotella T6.

Ed

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I run Klotz MX4 15w-50.  Produces the best shift action and clutch feel, and the inside of my motor is sooooo shiny I could do my hair in the reflection.  Rotella will work but it was pretty much cooked after a few outings.  I'll run the Klotz for 10 outings (usually a year of riding for me).  It smells good to boot!

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