Originally Posted by alvintimothyjr

I want to start racing this year and I'm considering picking up a GRP silver top .21 from a friend for my kyosho st-rr. I't only has a 1/2 gallon on it. Is this engine considered broken in with only a 1/2 gallon through it? Does anyone have any information about this engine? Whats a good pipe for this engine? I'll probably be running the st-rr at revelation raceway in Ontario, California. Any Info would be greatly appreciated. I can't seem to find any info on the Silver top anywhere on the net.

Thanks in advance.