Someone help plz!..small gear wont turn.

[Big joe 3288]

I hope im doing this right..so i bought a used 66cc after putting what money i had together that wasn't running but the engine was turning over, this being my 4th bike i felt confident on repairs..first there was no compression so i adjusted the clutch and put new ngk plug...i tried to fire up but i only got sputtering and flames out of the exhaust..then i towed it really well to rule out flooding..after good daytime inspection i found the head was not bolted all the way down so i did so and now the the piston does not move with plug in or out i notice small gear not turning!

 

[crassius]

I'd first take off head in case piston is hitting it.

 

[Big joe 3288]

Thanks..but i took top off and still no action..then took bottm off no action..us it possible something could be bent or stuck..and i heard some stuff about woodruff keys im not sure what that is but could it possibly be broken?...oh also none of the gears move only clutch plate.

 

[crassius]

could be something stuck in the teeth of the large & small bevel gears - lock the clutch lever released and try to turn the small bevel gear with a screwdriver in the slot of its bolt - try both ways & look at the teeth for chunks stuck there

most common thing is that your motor is seized though

 

[Big joe 3288]

I checked out the gears nothing seem to be stuck..small gear wont turn..they both turn fine before i tightened the head down which was the original problem this only happen after i tightened down the head and put new plug in .. but it never ran could i have seized it just trying to start it?

 

[Big joe 3288]

I took off top and bottom end to try by hand but no luck or could the attempted tow start seized it maybe?

 

[crassius]

possibly, but usually that would mean it had serious problems before that

 

[Richard radke]

Small bevel gear won't turnno