ran the RC8 today, and yes... the stock ball cup is to large for the GO carb.
A xray one works great.

Took the win today as well thanks to my STUPID fast GO 7 Port. Very consistant power throughout the day and the motor felt exactly the same for the whole main.

I tried the 053 pipe and it seemed to tame the motor down just a little over the 086 i usually run. I really liked it so i plan to run it for a while to get a better feel of which i truely like better.

YGM Russell.