scoots down

[blue]

Scoots down cant find out whats wrong.time to sale for parts.and get new.

[tortoise]

cant find out whats wrong

What engine, and which of the fuel-spark-compression related elements is deficient?

[blue]

Its a gy6 50 cc has spark and compression and geting gas.the last few mornings its been starting hard.I replaced the carb and still nothing.valves have been checked.and new battery.thinking its something in the wireing. Maybe cdi.

[tortoise]

gy6 50 cc has spark and compression and geting gas

If no intake manifold vacuum leaks, check timing . . sometimes the flywheel woodruff key will shear.  Insert a mini-screwdriver into the spark plug hole to determine when the piston is at top-dead-center while rotating the cooling fan . . then verify flywheel and camshaft sprocket timing mark alignment.

ValleyScooterParts offers free shipping over $15 . . so a replacement stock CDI and ignition coil would cost around $20.  ScrappyDog offers just the trigger pickup coil.

[2wheelfun]

If it's getting spark the CDI will not be bad. Is it a strong blue spark or weak yellow spark? Those cheap spark checkers from HF work really well for testing. Old plug hooked up and layed against a ground works well too.......is the plug wet after trying to start it? Does it fire up if quick start is sprayed into the air intake then die?

[blue]

Nice blue spark.and plug is wet.ill try to adjust timeing and valves again just to make sure.

[blue]

Its the stator I have no power come from it when motor turns over.

[BettinANDlosing]

Nice blue spark.and plug is wet.ill try to adjust timeing and valves again just to make sure.

If the spark can jump a 1/4" gap and the plug is wet you rich, puke rich. What's your jetting and any mods ?

[blue]

Oh no it might be to rich.I did put a bigger gas line on.ill go back to a smaller one and try that.

[BettinANDlosing]

Fuel line size makes no difference in jetting.

[zombie]

+ one on the woodruf key. I've had a few slip/shear.
I'd do a compression test too. Maybe a burnt exhaust valve.

[blue]

Compression is over 120 .mmmmm has to be something in the wireing.if valve is burned would I still have that good of compression.

[tortoise]

has to be something in the wireing

AC or DC-CDI ignition system?

[blue]

AC or DC-CDI ignition system?

   dc

[zombie]

Compression is over 120 .mmmmm has to be something in the wireing.if valve is burned would I still have that good of compression.

The compression would feel good by hand or sound good on the electric start but it would never read good on an accurate tester.
If you have spark it cannot be a wiring issue.
I had one scoot that had the same problem. It went to three shops before the gal found me. I looked at the thing for three days before I thought of the crank key, and as soon as I put my hands on the flywheel/rotor, it spun on the crank.
Pulled the nut off, and found the key had sheared off level. I guess what happened was the nut loosened just enough for the rotor to slip. It's worth looking at.

One other thing I have done is put a socket in a 1/2" drill on a 6" x 3/8" extension and use the crank nut, and drill as an electric starter. Do this with a timing light, and the plug removed. It will spin the engine fast enough for you to read the timing marks.