Originally Posted by dayglo33

I had a few questions about the crf 21 rev 2008 motor. I run it on 30% fuel and a 086 Dynamite pipe. I put an extra head shim in it and run the 7 restrictor. I run it in a mbx6T. Did you say that you got almost 11 minutes with yours? What was the temp range? Mine still seems fat somewhere because I get residue on the side of my body when running and I'm only getting about 8 1/2 to 9 minutes. About 250 for temp on a full tank. I have about 2 gallons threw it now. It is stupid fast and has crazy power. Any help? Thanks.