Engine Wont Turn Over

Well, it was good while it lasted. Last night over halfway home, the motor locked up. All I did prior to that was tighten the chain because it was loose, and get some gas.

Any ideas?

Mike

that is not good. pull the head to see if your barrel is gouged or scratched. if so your fuel leaned out for some reason. if so buy a piston, rings and barrel. before reassembly replace studs with quality hardware including washers and nuts.

Is if the engine is frozen you might just want to soak the thing in oil. It might work.

You say you got some gas, did you make sure that gas had oil in it?

Have you checked to see if the chain bunched up at the small sprocket on the motor? Some people have had that happen.

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The piston is stuck in the barrel. Any sure ideas on how to get it out?

Thanks!
Mike

Stupid quextion.

Are you sure the engine is locked, or is the chain locking the engine?
You said "the only thing I did was tighten the chain and get some gas".

You did mix oil right? If the piston is seized in the jug, it's probably toast. These engines have a nikasil liner and once scuffed, and compression lost, can't be re-bored.

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If it ain't broke, and you mess with it long enough, it will be.

ok your piston is stuck right? remove head--lift barrel as far as possible--if you can get to piston pin, pull retainer clip and drive out pin--if not visible then place some wood between barrel and block, then tap piston.

I had adjusted the chain tensioner before I started off. The day before
I refueled and used Lucas synthetic 2-stroke mix. I mixed it 30:1
because it was my second gallon of fuel. I got about half way home from
work and the motor stopped. I try to start it back but when I let off
the clutch the back wheel would lock up. I have since taken the top end
apart. The ring was broken and wedged in between the piston and the
cylinder wall. They are both trashed. So now I'm looking for a new
cylinder, piston and rings. Any advice as where I can get the best price
for these parts? After looking at buying all the parts separately it is
almost more cost effective to just buy a whole new kit. That way I will
have plenty of spare parts. I really enjoy riding the bike when it is
working properly, and as an added benefit I have learned a lot about
small motors.

I'd just buy what you need. It's better to buy a set (piston/wristpin/ring/jug) together anyhow. Call any of the sellers, one will set you up.

Thanks for the complete update, something that is often overlooked.

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If it ain't broke, and you mess with it long enough, it will be.

now that you know its a broken ring. please tell us if your piston has positioning pins to keep the rings from spinning. if so did a pin become dislodged. i have a powerking 80 and it does not have pins. mitch