I am thinking about tearing down my '01' raptor to fix a shift fork, naturally I need to do the '02' trans upgrade. While it's torn down I was thinking of building a 686.
1. Is 11:1 pump friendly?
2. Do you need a new rod with 11:1, if so can I run a lower comp ratio on my stock rod, what about the crank?
3. Does a 686 need stronger gears than an '02' stock set? Yukon?

I run my Raptor 90% in the sand.

 

11:1 Is pump gas, find a sunoco and most of them have 94oct

You do not NEED a new rod or crank but I would strongly reccomend them (at least the rod), its a matter of time before they break.

The 02 gears will be fine with the 686

 

What about a used '02' tranny off ebay, should I even consider making a bid or just shop for new? I am thinking of a used transmission so i can afford to do more with the engine mods.

 

[quote]
Originally posted by: Dowery660
What about a used '02' tranny off ebay[quote]


Here's a Link to a new set of 02 gears. Compare prices then decide.

There shop is in Salem not to far from Hillsboro.....

 

Does anybody know what is the best size tire and sproket setup for the raptor to get the max bottom end power. Also what is the best oil to use for the raptor to race and my raptor smoke white smoke a little bit and somebody told me it might be my piston ring it my be worn.