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Need help with 88 kx125

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I bought a used kx 125 and I am seeming to have some problems with it. First off the bike lags (has absolutly no get up and go) a lot if the throttle is more than 1/4 open. I am thinking it might be something to do with the jetting. The carb has a 52 slow jet and a 140 main jet. The jet needle is set at the 2nd mark. My main question is- does it sound like i am running the correct jets for about 3000' elevation?

Also, my reeds are good, the spark plug looks good (nice dark brown color). Any help would be appreciated.

Thanks

- Matt

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how much compression does it have? a used 20 year old 125 2 stroke needs to have the engine condition evaluated.

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