'94 YZ 125 - bogs and hesitates under load at lower RPM

[AGrayson84]

Hey everyone, I picked up a stock '94 YZ-125 about 2 years ago. It was in need of a new jug and piston. I decided to freshen things up beyond that, and before I even got it running I did new bearings, new crank/rod, cleaned up the carb, slapped on a FMF pipe and muffler, had the jug bored to 56mm as well as nickel-plated and honed, had the jug ported for more mid-range power, had the head milled, aftermarket reeds, new spark plug, and popped in a Wiseco 56mm piston/ring.

Ever since I got the bike running it has no power down low. I'm using 93 octan gas and have done several different gas/oil mixtures after starting with the manufcaturer's recommendations. I've also tried a several different smaller and larger pilot jets, and have replaced the mixture screw.

The bike just hesitates and jerks around down low as you try to give it more throttle to get up to speed. I can keep it in first gear and try climbing a hill and it just simply will not do it without a bit of speed and momentum. If I were to try to stay under 10 mph it just won't do it without hestitation, bogging, and then dying out. Some people say this is typical of a 2-stroke bike like this, and I've never owned/ridden a 2 stroke dirtbike before but I beg to differ. Anything under between 1/4 to 1/3 throttle and it just acts up as I described. It runs like a raped ape once it hesitates it's way up past 1/4 throttle or so.

The throttle slide doesn't seem to be too worn and everything in the carb seems to be stock (slide, jets, etc.). Like I said-- I've tried different fuel mixtures and pilot jets to richen and lean things out and have adjusted the hell out of the mixture screw and just can't seem to shake this problem, or even get it closer to running right with the adjustments I've made. I know it's nearly impossible to tell me what needs to be done when you can hear it or ride it yourself, but I'm having trouble determining that it's running too rich or too lean and could really use some more suggestions. Should I maybe just try a different carb all-together???

Thanks,
Andrew

[AGrayson84]

Please delete. I posted this in the wrong section.