letitroll

iTrader: (4)

I just got an RB S7 europa and upon removing the heatsink head, I noticed that the top of the piston is somewhat pitted. I was just wondering if this is considered normal ware, or if I should replace the piston and sleve. Also what are some good websights where I can purchase parts for RB Concepts Parts?

Jeff Ford

iTrader: (24)

If it is pitting, it can be caused by predetonation by to high of nitro content. RB's are generally set up for up to 25%, you need to add a .5mm shim to safely run 30%.