Fredette vs RB carb mods

ek415,

If you haven't gotten another response, the Fredette carb mod is a bore from 33 to 36mm only with a jet needle change. The RB Designs mod includes the following:

Boring to 36mm
Installing plate
Modify circuitry
Modify slide
Install new needle
Change jets (if necessary)

Hope this helps! I am still wanting to get the RB mod myself. I am slow... Maybe this year? :confused:

If you do a search on RB Designs, I think you'll find that everyone raves about how good the performance can be; the baisic jetting starting points have also been refined and that makes fine tuning MUCH easier. Just my .02.