RoyG- Once you get between 1-2 gallons through that motor- it will be more than a handful. (JP FX) I've tried alot of motor- from RB,Crono,Mac,CMB,Nova,Hyper,OS,JP,Rex,Top,Rossi Black Magic, I find the JP FX B5-N Stock to be the most reliable and most useable powerband- great fuel economy easy tunability- all clutch,pipe and needle tuning. Just make sure your patient with it and don't lean the motor out too early too much. Wait till its fully broken in-1-2 gallons.