New top end piston rings and cylinder

[Matthew 570]

Just replaced my top end new piston rings and cylinder I have a dnc pipe and open air box I put a 310 jet in the carb and I'm dooing heat cycles to break in the new piston but I'm having issues the quad keeps breaking up and seems to have lost some power I can't get fuill throttle and it has a bad vibration when riding it not sure what the issue is any suggestions

 

[Awk08]

Just replaced my top end new piston rings and cylinder I have a dnc pipe and open air box I put a 310 jet in the carb and I'm dooing heat cycles to break in the new piston but I'm having issues the quad keeps breaking up and seems to have lost some power I can't get fuill throttle and it has a bad vibration when riding it not sure what the issue is any suggestions

YOU SHOULD NOT BE DOING FULL THROTTLE OR EVEN RIDING IT FOR HEAT CYCLES !
http://www.blasterforum.com/threads/blaster-engine-break-in.44174/

has it been leakdown tested ?
http://www.blasterforum.com/threads/about-air-leaks-save-your-engine.55537/#post-763164


other DMC users report that pipe likes the needle clip dropped 1 spot from the middle to the 2nd from bottom position
to richen the mid range jetting

float height checked ?
http://www.blasterforum.com/threads/float-heights-and-how-to-adjust-them.50565/


airscrew adjusted ?
http://www.blasterforum.com/threads/adjusting-your-airscrew-pilot-jet.51060/

then heat cycles and some "no full throttle" break-in time.

after all that.....plug chop for the main jet
http://www.blasterforum.com/threads/plug-chop-video.65534/