help with engine choice

[jakkxgoldsakkx]

hi i have what you guys { forum memebers} think is a yx 140 engine. my son after riding my 140 with 26 mm oko carb . says his 125 lifan isnt fast enough lol. so we are looking at up grading his engine . i dont know anything about these motors. what are yx motots like as i can get one for 500 brand new with oil cooler carby & race ignition. is this a good price . dhz offer 140/150 engines coles to this price range but they arnt yx motors. can somebody tell me which way is the best to go.. i was totaly suprised at the way the 140 went a lot of punch for a liitle motor. thanks in advance . jakkx

 

[sm00th]

Try one of dhz gpx 125 race motors. It will keep up with any 140

 

[jesseRS10comp]

or a daytona threre sweet engines