clutching stock mtn apex

[Blaster44]

Hey guys,
What do you guys run for rivets in your stock primary's at about 5000 ft?? 07 apex mountain....all stock except timbersled rear skid
Thanks

 

[grapeape]

I am 260 and for low and high ele clutching I use Yamaha specs but go the next tip weight rivet lighter. I also use high alt gearing at both elevations

 

[crewchief47]

Blaster, Welcome to TY!

You may want to check out www.ty4stroke.com as well. You need to sign up over there but you can use all the same info as you did here.