Benzhou Saga 150cc GY6 scooter By tsprechert (Read 252 times)

[tsprechert]

I have a 2008 Benzhou 150cc saga scooter. Last year someone tried to steal it. Afterwards the starter sounds like it just spins and the engine does not turn over. I have replaced the starter, the starter clutch, the starter solenoid, battery but the starter still "spins" and doesn't turn over the engine. Super frustrated!! Any ideas/help is greatly appreciated.

Also, the kick start doesn't work either.

[classacted]

did you inspect the underside of the engine 100% and no damage found?

 

if you replaced the starter clutch, then you saw the chain underneath.  at least MY gy6 150cc has one.  I would suspect yours has one too.  that chain is the first thing I would suspect.  there may be a woodruff key on the crankshaft somewhere and if that has failed somehow, you are very lucky. 

bummer what happened to you.  I've had several ugly mopeds stolen myself.  I know how it feels. 

you may end up removing the magneto and covers on both sides, but hopefully there will be no major damage.

[geh3333]

Good chance the crankshaft broke free from the piston.or timing chain with the exhaust valve in the open position.

[geh3333]

Jun 5, 2023 1:21:10 GMT -6 geh3333 said:

Good chance the crankshaft broke free from the piston.or timing chain broke with the exhaust valve in the open position.

the chain by the starter clutch only runs the oil pump , so even if it broke you would still have a running scoot until it burns up from not oil to the too end

[classacted]

got it.  I learned something new.

did you ever find the culprit?  if not, my bet would still be on that woodruff key.

[geh3333]

First thing he needs to do is start the scoot with the cvt cover off. If the variator spins when the scoot turns over , that means the woodruff key is fine. Next take the spark plug out and try to start the scoot . Hold your finger over the plug hole and feel for compression. If there's no compression this means you either have blown out rings or your crankshaft separated from the piston. I forgot that if the timing chain breaks , more than likely both valves will be closed due to the valve spring tension. Are you sure you have a spark plug in? Sounds dumb but hey anything is possible, lol

[classacted]

I use a good ol compression tester when I adjust the valves.  it's tedious, but guaranteed.  when I'm done the compression can not be lower than when I started.  it can only be equal or better.  when I start I do a compression test and every time I do an adjustment I put the head back on and test again.  it's only four 8mm bolts, and to be certain I have the valves at the best possible adjustment is worth it IMO.  putting the head back on ensures that the oil goes where it has to go.  right now my compression is at 137 psi, which is what it was when it was new.

[dyoung1167]

some times mine does that, a little jab at kickstarter gets it back into working order, almost like it's missing a tooth but i don't think so. probably just sticking as the spin should push it into place to engage