Zddp

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I'd say don't. Wet clutches on bike do not like additives - clutch slip is the last thing you want, especially on the Max..

Remember that most of those things are made for car engines, where the oil lubricates the motor only, not the clutch and gearbox like on our bikes.
 
Shell rotella no longer contains zinc !!!! It hasn't since the api rating changed, for that matter no oil except for specific break in oils, such as royal purple has zinc in it anymore !!! So if you want zinc, you need to use an addative, such as lucas break in addative or zddp
 
When did it change? I have an email into the oil guru to find out when and why he hasn't posted this up...
 
HOLY CRAP he responded FAST!

Hi Christopher,

The zinc has been reduced but not removed, and there's now some moly, but not enough to wreck our clutches. We're slowly being squeezed by those, um, persons of lesser genetic quality in Washington.

Mark
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Sincerely,

Mark Lawrence

California Scientific Inc
 

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