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Discussion Starter · #1 ·
I recently picked up a 91 rm125 as a project and possible flip to make a few bucks. Paid $400 for the bike and parts for a top end rebuild the guy already bought. Turns out the cylinder had a big scratch in it from pieces of the ring. I got a used cylinder in good condition cheap and assembled the engine. Bike fires right up but seems like it's running rich. White smoke, no power in low rpms, gets better as rpms come up but still not as smooth or powerfull as it should be. Been through the carb and jets. Could it be a timing issue, power valves, or just letting the new ring seat. Any help is appreciated
 
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