Originally Posted by stevef

Ive been running a MR-B01A in an MBX5T this season and it has suffered from a lack of bottom end. I have used a 2050 and 9853 pipe on it. I switched to 1.1 spings and it helped a little. This past weekend i tried a JP-1 pipe and it really came alive. It definitly lowered the max rpm but im ok with that for now. I ran a 10 minute heat and still had some fuel in the tank without a pit stop. I have heard that the JP series pipes are fuel hogs. is there a better low end pipe i should be using?

thanks, Steve