Had bad wether here for about a week and a half then was out of town and didnt ride the scoot for 2 weeks. it was running great before, i did not do anything to the scoot in those 2 weeks.
today i start it up, it is running pretty bad, went right to the gas station and filled the tank up, no difference. i rode a while hoping it would fix it self. once the engine was hot and it ran a little better, but still not right.
so idle is good. light throttle is ok. full throttle is ok, power seems a little down not much, though it does hesitate a little, maybe a cough or sputter then it goes.
the biggest problem seems to be cruising, part throttle it runs terrible, sounds terrible, not even rideable, i basicly switched back from light or full throttle all the way home otherwise it seemes like it wants to die.
what do you think it is, again i did not do anything to the scoot, its a 150cc new this year only about 300 miles on it.
Post by jjoshua20213 on Jul 2, 2014 23:10:50 GMT -5
A week and a half of sitting will not effect your carb. These bikes are built for quantity not quality. I would first check ALL the vacuum lines and components for leaks. Make sure the air filter is in good condition, and the carb and manifold are secure. Next check and ensure your spark plug is in tight (Too tight and it will strip the hole!) and that the boot is on good. The spark plug wire twists onto both sides. If that does not your. Check your carb diaphram for cracks.
2012 Tao Tao CY50-A
20mm carb w/90main jet
8g Slider weights
Free flow air filter
Blue performance cdi.
NGK Iridium Spark Plug.
51mph top.Gps Verified
Yeah cleaning the carb is a common thing and easy to eliminate in troubleshooting . I have gotten bad gas with water in it before . My scoot had ran like a dream but the next day no start . Had fire , compression and fuel but no go . I drained the tank and carb , refilled with gas from a trusted source and it was new again . On my other scoot I had a vacuum hose come off and it ran terrible with a power loss . I put on a screw down clamp to hold the hose on and it was good again .
Thanks i took the top off th carb the diaphram was fine. the float bowl has security screws on it need to be drilled off or cut a slot. thought id try that later. instead i put a copper wire through the main jet from the top in case its dirty then shot some carb cleaned thru the main jet
well i went riding and no different, then a mile away the scoot lost power, then died and did not restart.
i check hoses wires all seem good and tight, open fuel tank, gas in there. then try to start again scoot fires right up and now running great like before. was it some thing in my carb that blew out or was it electrical and when i move wires it fixed it, so i am totally stumped now
I think it's the valves and after it gets nice and hot it will happen again. The valves tighten up and then the motor looses compression and does not create enough suction to draw fuel into the motor. Then after it cools off it will start again but if you ride it and get it hot it will do it again. Thats what I think the problem is so you need to adjust the valves. If it's a 50cc adjust both valves to .003 inchs if it's a 150cc adjust both valves to .004 inchs. Alleyoop
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PST150H 62mm BBK, 60mm Crank, 16/37 Tranny Gears..MOW-POWER
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