NoobRiderKX80R4
Member
I have a 1994 Kx80 Big Wheel with the Kx80 R4 82cc 48mm Bore. Not so long ago I was warming up my bike and maybe 20 seconds after getting on the bike to go riding I heard a loud bang, I immediately hit the kill switch and walked it back to the shop and tore the top end off to find that due to a stuck ring the Piston shifted to one side and hit the Exhaust port shearing off a chunk of the Piston Skirt. I have checked the cylinder and all Port openings for damage @ x4 magnification and found no damage at all (thank the Dirt Gods).
I'm replacing the Piston and rings, but there are 3 different Sizes to choose from Size A, which is oem Size 47.94mm standard. Size B which is 47.95mm/+.01mm Over. And finally Size C which is 47.96mm/+.02mm Over. All will fit in my Bore, but what I'm really wondering is:
if I go with Size C instead of the Standard OEM size that came in my bike, What Performance Increase would there be (if any), and would it help make it so that this kind of thing doesn't happen again any time soon? And yes I realize that worn rings and air/fuel/oil mixture is a critical factor that also contributed to this happening.
Any Help in this matter would be greatly Appreciated, Thank You
Sorry if I posted in the wrong thread
I'm replacing the Piston and rings, but there are 3 different Sizes to choose from Size A, which is oem Size 47.94mm standard. Size B which is 47.95mm/+.01mm Over. And finally Size C which is 47.96mm/+.02mm Over. All will fit in my Bore, but what I'm really wondering is:
if I go with Size C instead of the Standard OEM size that came in my bike, What Performance Increase would there be (if any), and would it help make it so that this kind of thing doesn't happen again any time soon? And yes I realize that worn rings and air/fuel/oil mixture is a critical factor that also contributed to this happening.
Any Help in this matter would be greatly Appreciated, Thank You
Sorry if I posted in the wrong thread