My girlfriend's Kymco 50 2t won't start By ragtopdodge (Read 486 times)

[ragtopdodge]

Plenty of spark.

New Keihin carb.  New petcock.

Will start (and idle real fast) with starting fluid.  But then it will die and not start again (w/o fluid).

Decent compression (I think):  95psi

I'm at a total loss.

Do I need to maybe adjust the float?

[alleyoop]

you need to adjust the carb, if its a 2 stroke it has a AIR RATIO screw on the right side next to the AIR INTAKE(Filter side).
It is not getting enough fuel, turn that screw clockwise 1/8 at a time and try it after each 1/8 turn. It is very sensitive so not to much at a time just small increments.
Alleyoop

[alleyoop]

you need to adjust the carb, if its a 2 stroke it has a AIR RATIO screw on the right side next to the AIR INTAKE(Filter side).
It is not getting enough fuel, turn that screw clockwise 1/8 at a time and try it after each 1/8 turn. It is very sensitive so not to much at a time just small increments.

Also 95psi is not descent compression it is low if you did it right.

When you do a compression test, did you hold the throttle wide open? When testing compression you want it to suck in as much air as possible and to have it do that you need to hold the throttle wide open while doing the compression test.
Alleyoop

[ragtopdodge]

I fiddled w/that carb mixture so friggin' much. But let me mess with it some more.

No, don't think I held the throttle open when doing the comp test. Plus, my compression tester wasn't a screw-in type, so probably had air escaping.

[ragtopdodge]

Could it also be bad Reed Valves?

[alleyoop]

Yes it could be a bad Reed Valve, if you take it out look at the reed and see if it is closed if its not try FLIPPING the plates around and see if they then close.
Alleyoop

Here is how to tune a Stroke Carb:
thescooterprofessor.proboards.com/thread/3002/2-stroke-carb-tuning?page=1&scrollTo=23302