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Post by pledwar on Jan 27, 2015 12:39:23 GMT -5
I know its a carb problem but I don't know what I've put the same carb on both my kymco and the little taotao and they both do the sane thing they will start and run fine no problems at all but after about 5 minutes of riding it dies about ad fast as you cone to a normal stop ...I don't know what it is any ideas ?
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Post by niz76 on Jan 27, 2015 16:43:29 GMT -5
Is it auto choke? Maybe it's malfunctioning? 5 mins is about how long they take to warm up and choke goes off... Is it jetted rich enough?
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Post by jareeb on Jan 27, 2015 16:45:40 GMT -5
My guess is its the crank seals.
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Post by birdman on Jan 27, 2015 17:41:37 GMT -5
Sounds like an auto choke issue for the same reasons niz stated. jareeb just out of curiosity what makes you suspect faulty crank seals? |
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Post by Fox on Jan 27, 2015 18:04:36 GMT -5
Sounds like auto enricher. Test it by hooking the leads to a battery. The needle should extend outward. If it doesn't then it's bad.
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Post by pledwar on Jan 27, 2015 20:46:00 GMT -5
I'm running a 90 main with a UNI filter the auto choke is unplugged ..and how could it be crank deals ?
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Post by Fox on Jan 28, 2015 1:49:07 GMT -5
I'm running a 90 main with a UNI filter the auto choke is unplugged ..and how could it be crank deals ? Contrary to what many online call it, it's not an auto choke. It's an auto enricher. When it's cold the enricher is in RICH position allowing extra fuel to enter the combustion chamber via the enrichment jet. When you start the engine voltage is applied to the enricher unit and it warms up making the needle extend outward cutting off the extra fuel effectively leaning out the mixture. With it un-plugged it stays in RICH position all the time so it runs good cold and then it refuses to idle when the engine gets hot cause there is too much fuel going into the engine when the throttle is closed. It could easily be called an "auto leaner" cause that's what it does when activated. What I'm trying to say is: Plug it back in! It's labeled "choke jet" in this picture but again, it's not a choke. Chokes cut off air to enrich the mixture. Enrichers add fuel.  |
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Post by jareeb on Jan 28, 2015 8:16:02 GMT -5
Crank seals can do funky things. But check the auto chock first
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Post by iwannascoot on Jan 28, 2015 9:47:12 GMT -5
I think Fox has this nailed. You need a way to richen the mixture when your engine is cold but if it stays rich enough for a cold start then it will be too rich to run right when it warms up. You need the auto enricher to work for your engine to operate properly.
In the old days when cars had carburetors, you had to step on the gas before starting the vehicle to "set" the choke. If you did not step on the accelerator pedal, the engine would not start on cold mornings. Your scoot needs a way to richen the mixture for cold starts and then it must lean out the mixture to run right when it warms up.
Plug the enricher back in ad retune your carb!
Billy
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Post by pledwar on Jan 29, 2015 6:32:38 GMT -5
Oh seevi thought it was the other way around I thought when the engine sent power to the enricher it richend the mixture I'll give that a try ...thanks you guys for the help
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Post by scooterpimp on Jan 30, 2015 5:47:58 GMT -5
If im not mistaken you have a 4t ,?dont fuss about Crank seals if 4t ? Valve lash set correctly?
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Post by pledwar on Jan 30, 2015 7:55:33 GMT -5
Yes both my scoots are 4ts I'd love to have a 2t but I can't seem to find one and and yes the valves are fine it's the carb because I've put it on both scoots and they did the same thing
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