Originally Posted by JGray

I have been running RB Mods Go's for the past two seasons with great results. I have a 21 5port, 7 port and 25 6 port that I run in a Losi L8 for dirt oval racing. Really can't think of any issues other than the seriously tight pinch at break-in. Just keep up with you normal maintenance and they will last for ever. I replaced the con-rod and bearings (ceramic) on all three at the two gallon mark and have well over 5 gallons on these beasts. Alot of the folks that I race with thought I was crazy for switching from NovaRossi but I could not be happier. Best bang for the dollar plus you will always have more power that you really need. Rick at RB Mods has the best customer service anywhere.