Why is my scooter acting funny?

by Derk
(Fallbrook, CA)

So my scooter runs fine and starts up quickly, but to get it to run at full speed is kind of tricky. It runs fine at half choke and will go. But not very fast, and when the choke is off, it quickly dies unless I am going downhill full speed at half choke and then turning the choke off.

But as soon as I slow down it dies. So, my question is: how do I get it to run at full speed all the time?

Comments for Why is my scooter acting funny?

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Mar 22, 2010
more info please
by: 1oldrider

sorry Jim but the idle air mixture screw is just that! only affects mixture at an idle. as to the original post, more info is needed such as size and make of scooter, is it A fuel pump system/carb,gravity feed? does it even have a carb or is it fuel injected? etc. will try to help if you give as much info on the scooter/problem as you can. thanx, Randy BTW sounds like a lean mixture if it will run better with the choke 1/2 on, or maybe the airbox/filter has a leak causing to much air to enter the system It's for sure a fuel delivery problem!

Feb 18, 2010
CARB Certified
by: Jim Zeiser

It sounds as though something in your Emissions System is adjusted wrong. In the rest of the country I would say adjust the idle mixture screw on your carburetor out a little to compensate for a lean condition. I don't know if you can there. If you can access the idle mixture screw, a turn out will probably keep it from dying. Also have you set the idle when it's warm just standing still? Your throttle cable may stretched and a simple adjustment may be needed.

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