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1997 yz 125 probs

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My freinds 1997 yz 125 is having problems. It starts easily when its cold but hard when hot. Also it bogs wen u go over jumps. It also has no power except top end. The compression is 125 smokin hot. Ive cleaned the carb. it also ran like crap when i put the neddle 2 the bottom and alot cleaner when i put it on the top. The spark is great. The throttle response is horrible. I bogs when it shold have power. It bogs in the midrange, bottom , and a bit on the top. I have 2 clutch it just 2 get power. What shold I do?

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I would check a few basic things like the carb vent hoses, air leaks, bad plug, broken reeds, carb air screw adjustment, dirty air filter, fresh gas, weak coil and repack silencer before I spend a dollar. Chances are one or more of those are your problem or at least a part of it. :thumbsup:

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Definately time for a rebuild. No amount of jetting or other bandaid fixes will take care of a worn out motor. Tdub

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