I've got a '97 KX100 I outgrew long ago. Its in okay shape. Gear box is completely rebuilt. Rest was a work in progress. I replaced throttle and brake cables. It has very few hours on a rebuild, but it blew up so it needs a top end rebuild. I couldn't find an air filter for a long time so it has a Spektra cone air filter on it instead. It also needs the shocks rebuilt. Still has good tires. I've put over $400 into it so far, plus buying it. I've gotten very little use from it myself.
SOLD FOR $250
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Will come with extra misc. parts including ratio-rite cup, oil, plugs, and I also have the stock air box and extra muffler packing.