I went from my CT70, XR250, XR600, YZ250,YZ426,WR450 and now just picked up a KTM300XC-W. Best of both worlds with the KTM. 2-stroke with the 4-stroke powerband and 220lbs and electric start/kickstand. The 4 strokes are way to much $ to maintain. Back to the $300 rebuilds after 200hrs!
what year BF? If it is an 05/06 it could be your wiring harness below your seat is starting to corrode. I had the same issue and soldered all the wires where there was a connector and all was good afterwards.
The muzzy is a much better pipe IMO. I have both and the muzzy gives better power gains and a nicer low rumble which is not to obnoxious. The only benefit I do see from the HMF utility series is the fact that you do not have to repack the exhaust with the fibrefill like you do the muzzy.
I have the following Brute Forces and can give you an idea of what works and doesn't work on 08+ vs. 07 and older:
05 BF750
06 BF650
07 BF750
08 BF750
First off, the EFI unit is not much faster than the carbed 07 units, but is faster than the 05/06 stock units. This is due to the fact that...