I just picked up my cylinder, had it bored to the next size up with a light port job. The new piston is 70.25mm now and with the light port job will I notice any diff with the bore and port job done to it. Speed is not really what I was looking for just a fresh cylinder to run for awhile is all I wanted and it did really need a new piston. Thanks

 

Going up one bore size in and of itself won't really pick up the power but the fact that the motor is fresh now should make a noticeable difference. The port work should wake it up too.