July 8, 200620 yr Hi, Can anyone give me the standard specs for a ty80 carb ? Jet sizes , pilot screw position , and especially the needle number as i dont think it is the correct one. it supped about half a litre of fuel in a couple of minutes ( cant be right ) !!!! Just put this back together from a complete wreck that some kids had been ragging around as a field bike. Nice little machine now but seems to be running way to rich ! Also any idea where I can get a needle from ? Many thanks Jim.
July 10, 200620 yr Might be the needle and seat not sealingoff when float rises. that is common. shut off the petcock, run it until the bowl is dry and the engine dies. turn on the petcock. 'Sometimes' this rush of fuel into refilling the bowl dislodges dirt and temporarily solves it. Then the dirt migrates to the pilot circuit and bike won't idle unless on choke. Take the fuel screw out, squirt in cleaner, blow air with a small piece of rubber tubing, through the pilot hole. Reinstall spring and adjusting screw. That blows the dirt away from pilot circuit. If either of these tricks solves the problem, you at least know where the dirt is. Cleaning the tank, adding inline filter, and cleaning the carb thoroughly are the necessary fixes. I have jetting info at home if I can find it in the next few days.... kcj
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