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Message: [QUOTE="Krossipoiss, post: 1366393, member: 98706"] Hei. I just put new boyesen power reeds into my kx125 and have some probs with idle. I put in a bit bigger pilot jet(as said in boyesen manual) and spark plug is nicely creamy now(light brown).. When bike is on gear,then it misses some (don't know how to spell it..just goes like rrrrrrrrrrrr-n-n-rrrrrrr)when i drive longer with full throttle with 1. or 2. gear...And when clutch is on or bike is in the idle gear,then i have the same sound when i hold throttle in some points longer..if i hit throttle fully on,then the sound is nice equable..but if i hold gas on for longer time in some arbitrary point,then it gives that bad noise. Is it caused by eroded piston?(Should be 56.5,mine is 56.2)..has only 15 hour's on it... [/QUOTE]