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Post by rxguy667 on Oct 10, 2013 9:27:08 GMT -5
Can installing a piston upside down scar the port side of the piston? I installed a 70cc kit and put the port on the piston exhaust down. 3 miles later the motor screeched to a stop and pulled it apart and saw that the piston was scarred beyond use only on the port side, it forged the rings flat to the piston.
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Post by alleyoop on Oct 10, 2013 12:59:11 GMT -5
If the piston head has an INDENTATION for the valve to fit in when open YES.
Alleyoop
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Post by skuttadawg on Oct 11, 2013 11:33:27 GMT -5
I think you meant backwards as no way could you put it on upside down . On a 2T there should be an arrow that you point towards the exhaust pipe . If you did not install a larger main jet then it seized from being too lean .
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Post by itistheride on Oct 12, 2013 7:49:28 GMT -5
I had a 100 main jet so I can't see it being too lean. The arrow was facing away from the exhuast.
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Post by teddy554 on Oct 12, 2013 9:03:07 GMT -5
install the piston the way you did can do exactly what you described or never run right, the piston is designed to help flow gas and air to your motor and exhaust out, your piston on a 2t is pretty much like valves on 4t if you think about it.
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Post by itistheride on Oct 12, 2013 12:00:27 GMT -5
I just ordered a stock piston with rings to save money. But good to know that's what caused it. Only wish I woulda checked before installing it. Was too excited about the build. Next time I'll slow down and do my research. Thanks for your help.
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..BAD TO THE BONE..
