2 stroke rev limiter By wpdupont (Read 4,348 times)

[wpdupont]

I have a Linhai Powermax 50 with a 1E40FM 50 cc 2 stroke engine. It starts and idles fine, but when I give it gas it will start to increase the rpms, but then it wants bog down like it needs more gas. I have swapped carbs, but that made no difference. Is it possible this could be a problem with the CDI or rev limiter? The CDI is 5 wire. It has a 2 wire plug with one orange wire and one black wire. The other three wires have individual plugs on them. They are colored as follows: one black with red tracer, one white with red tracer and one black with white tracer. The rev limiter has a 2 wire plug with one black wire with red tracer and one green wire.
If there is a problem with the rev limiter, is it possible to by pass it?
Thanks, Wayne

[JR]

You can totally remove it some have a single wire to cut various colors and others just plug in and can be removed and the plug go straight to the CDI. Can you give us a picture?

JR

[wpdupont]

Picture of rev limiter and CDI

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[wpdupont]

Closeup of rev limiter

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[wpdupont]

Closeup of CDI

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[JR]

I have not done this but have read where others have. Just unplug the rev limiter and plug back up straight to the CDI.

JR

[blueboy5000]

On my Kymco yup, there is one green wire that comes from the CDI and goes back to it. That wire is the CDI limiter, once removed my bike can "over tach".

However, many newer 2t engines do not have this kind of limiter. I know modern Kymco Sting 2t have a separate Rev limiter, just as JR explained.

Be careful if you delimit your revs. Running at too high an RPM on a 2t can cause you to burn out your piston. I try to keep my Kymco at less than 9000 rpms (was limited to 7500).

I'm fairly certain that you can simply unplug your rev limiter. I'd give it a shot, worst thing that could happen is it simply won't run, then you could simply hook it back up, no harm no foul

Good luck!