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Post by decou23 on Aug 27, 2011 11:58:02 GMT -5
ok im pretty sure i got screwed on this 2stroke scooter i just got when i got it it wouldnt idle unless u held in the choke so i cleaned the carb and jets i put a new air filter in and messed with the idle screw and air fule mix screw and still didnt help so i read some where that u could bypass the oil pump and mix the fule in the tank b/c it could of been dumping to much oil in at low rpm so i did that and it still dies at low rpm but seems to run fine at w.o.t.... idk what els i can do to fix the prob. any help would be gratly appreciated
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tango
Scoot Enthusiast
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Posts: 389
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Post by tango on Aug 27, 2011 13:02:50 GMT -5
Define "mess with" the idle and mixture screws. When adjusting the carb for idle mixture and speed it's not an instant result, but a gradual one. Sometimes it's not after being run for quite a while before the true setting is revealed. What process of adjustment did you follow? Another means of adjusting the idle speed (apart from the carb itself) is adjusting the throttle cable. Have you tried that?
That said, you didn't mention checking the spark plug for good spark and/or proper gap. Did you check that?
Too much oil would result in a lot of smoking, for sure so that would be noticeable.
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Post by decou23 on Aug 27, 2011 13:58:22 GMT -5
ok i set the air fule screw back to factory seting and idle screw is idled up just alittle and it did smoke alot befor i bypassed the oil pump now its not smokin near as bad im gunna gheck the plug now... i just took it on a ride and it does fine till u stop then u have to holed in the choke and give it alittl gas to keeep it running i can ride it like that but its quite annoying...
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tango
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Post by tango on Aug 27, 2011 14:03:24 GMT -5
"Factory settings" may not be the ideal, FWIW. They set them so that they run at the factory which may be at, below, or above sea level and in who-knows-what temperature, under who-knows how much humidity. So you, my friend, will now have to adjust and rejet to suit the prevailing conditions where you are. Particularly as the scoot wears these settings become more critical.
As for the oil, if you have a cable operated pump the cable can be adjusted. That might be a bit more difficult tho...and indeed most around here will tell you to pre-mix the oil/fuel anyway. It certainly is safer, but less convenient. Check the plug and don't forget that it takes a little while for the new settings to take effect.
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bigjeff
Scoot Enthusiast
just scootin
Posts: 294
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Post by bigjeff on Aug 30, 2011 20:44:14 GMT -5
maybe the idle jet is clogged? Have you removed the jets and looked through them into a light?
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Post by scootinbow on Aug 30, 2011 22:07:55 GMT -5
Just my thoughts but I don't premix If you are using anything other than full syn it will smoke. Just adjust the idle mix and raise up the idle till just before the back tire begins to spin. Not all will idle really low. My Derbi with a piaggio motor idles so low that it shakes like a harley but never stalls. So to me it sounds like you need to raise your idle a bit and then set the mix and then reset your idle.
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