piston arm stretching??

[scottdoe2011000]

i recently had compression problems with my 80cc motor. found out it chipped the inside of the jug and messed up the piston rings and the jug itself. after replacing all that before i put the head back on i noticed that the piston was rising above the jug about an 1/8th of an inch...what is going on here??

 

[FurryOnTheInside]

Measure the two cylinders and see if there's a difference in the length?

Wait.. 1/8" ? That seems like a lot.

 

[scottdoe2011000]

ive already checked 2 other cylinders . i put them on and they were just the same, so next i thought the piston is too tall but changed it also and still the same problemm....IDK

 

[scottdoe2011000]

when i did put the head on it and torqued it down i pushed the bike to turn it over and every time it gets to that spot where it is higher it locks up the motor....

 

[Frankenstein]

So is the hole in the piston in the same place as the other?

 

[scottdoe2011000]

thank you. you are awesome...there is a difference in the position of the holes. i didnt even think of that..thanks again!!

 

[Frankenstein]

thank you. you are awesome...there is a difference in the position of the holes. i didnt even think of that..thanks again!!

No problem, you need type b piston, with the hole closer to the center of the piston. Good Luck.