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Post by trailheadmike on Jan 23, 2013 6:59:36 GMT -5
My riding cut off temperature is 20 degrees, and not because I'm cold, but because the scooter no longer runs properly. I have no problem starting, but the scooter never seems to warm up. It will go hesitatingly and then bog, for more than 15 or 20 minutes. Even when it runs consistently, its still not "smooth."
I see many threads here on cold start problems but not cold running. Do I need to adjust the carb for the cold?? I remember reading that if the air is too cold the mixture becomes too lean?? Its a Linhai 257cc.
Thanks in advance for you insights!
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Post by snugglebunny on Jan 23, 2013 9:13:55 GMT -5
mine and i think most, scooters run better
when its cold. i think because the air is heavier.
thats when i got my speed records, 28 degrees.
i think you want to lean out your a/f screw
but wait until someone else chimes in
i could be having you do the opposite
of what your supposed to.
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Post by richardthescooter1 on Jan 23, 2013 10:50:50 GMT -5
When its cold the scoot a/f ratio screw should be turned richer, leaner in the summer or warmer weather.
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Post by trailheadmike on Jan 23, 2013 11:44:41 GMT -5
I'll give it a try, thanks.
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Post by skuttadawg on Jan 23, 2013 11:48:03 GMT -5
I let mine idle for a bit when its cold and give it just enough throttle to spin the wheel while on the CD . Do not rev it up to WOT etc or so much that it walks
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Post by Fox on Jan 23, 2013 11:56:45 GMT -5
Stock air filter or aftermarket?
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Post by trailheadmike on Jan 23, 2013 11:58:09 GMT -5
Everything stock.
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Post by skuttadawg on Jan 23, 2013 12:25:35 GMT -5
There is an option for a hotter plug to use in the winter
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Post by qwertydude on Jan 23, 2013 17:54:51 GMT -5
The engines are tuned too lean to begin with add cold dense air and you end up with fueling trouble as the cold air doesn't evaporate gasoline as well and on top of that being lean means there's less gas to run.
I'd say just to have a better running scooter you need to rejet the carburetor. Doing so not only will have the scooter running cooler in warm weather and good running when cold because the richer mixture will prevent lean running while cold. To me that's what your symptoms sound like, cold lean running.
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