Engine Trouble Piston seized?

lukecanna

Member
Joined
Sep 25, 2017
Messages
79
Hi Everyone,
I just installed my fresh motorized bike kit which I bought on ebay.
i have installed one before so I have a little bit of knowledge on what to do.
when I pedal the bike then let out the clutch the back tire just skids to a halt. The chain is not bound or anything but I'm pretty sure my piston will not move because when I try turning the three pins when the clutch plate are they will not turn.
Thanks for reading, please help.
 


6blueoval9

Well-Known Member
Joined
Aug 28, 2017
Messages
1,120
Pull the spark plug out and try it again.

If it won't turn over file a claim and get a refund then shop at a better place for a motor.

If you want to try to fix it and maybe take it as a loss then try some 2cycle oil down the plug hole and rock the bike back and forth with the clutch engaged...if you can get it to break free pull off the cylinder and see where it maybe got hung up and go from there.
 

6blueoval9

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Joined
Aug 28, 2017
Messages
1,120
There's a chance if a ring is caught up on a port Burr it can break a ring trying to free it so that's why I say take a possible loss but fixing the Burr and replacing rings is a minor fix...Hopefully no cylinder chrome damage happens or a new cylinder will be needed as well...in all about 35$ $40 in repairs.
 

6blueoval9

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Joined
Aug 28, 2017
Messages
1,120
If your clutch can't turn when engaged the motor won't turn either so maybe try disconnecting the clutch inside the case then try turning the motor over by hand.
 

crassius

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Joined
Jul 23, 2012
Messages
4,572
too early in AM for me, but those 3 pins are hooked to chain and back wheel, not motor

you'd need to pull the spark plug and see if motor turns from the magneto nut
 

lukecanna

Member
Joined
Sep 25, 2017
Messages
79
UPDATE: I took the barrel off and the piston is jammed in the crankshaft anyone have an idea of what to do now?
 

crassius

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Joined
Jul 23, 2012
Messages
4,572
first, see if there's a warranty - I'd guess there's some kind of debris in a bearing down there
 
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