this motor is a monster two must do's to get motor full performace. trash the plug it comes with get grp 4-5 plugs and trash the 2053 pipe i use jp3 and it was night and day difference when i switched. everone wants to know how long these motors last well i will tell u this i got mine dasy one when they came out. i am just about to crack open the seal and be on my 7th gallon. with absoltely no problems and on the same grp#4 plug. this motor has not missed a beat yet still as fast as it was after break in. whats even more amazing is i was new to nitro when i got this beast i did the reseach and trail and error when u fist start and still going on gallon seven to me that says somthing. of course i know this motor like the back of my hand now. tip to all new to this motor think oppiste when u tune do bottom first when u go to top just lean it so it clears on the longest stairght on your trak and u will be perfect. my hsn is like is close to being flush with probally a half turn in. my lsn is probally two turns out of the lsn housing