I'd look to see if the slow idle screw is set correctly as per the manual - its usually around 1. All you need to do is to locate the slow idle screw and turn it fully closed whilst at the same time counting how many full turns so that you can turn it back if you want to and then open it 1.
The clip is mounted in the throttle slide and it's basically a kind of stopper. You could tell while running, if your scooter feels as if it has a flat spot on and around mid range, or it does not start to perform until the throttle is fully open, it will be too weak. If too rich the scooter will splutter at this position, but it will probably clear as you go onto full throttle.
The needle must be dropped if the engine struggles to rev at all, if there's a strong smell of fuel or the engine pops or backfires. And finally The larger thumb-wheel type of knob on the carb is the idle speed setting and this is where you can set the revs at which the engine ticks over. If its racing turn it down a touch, if its stalling a bit then screw it in a bit to raise the revs slightly. It is also advisable to inspect your jets before taking on this task, so all the work you do will not go to waste.
This is really not an art form. Listen to the engine, you can't do much harm if you turn the screws the wrong way. The mixture screw generally effects only the lower RPM and Idle settings off the line acceleration. If you find your plug is very oily or heat damaged, you may need to alter the jet sizes in addition to the mixture screw setting.
Instead, inspect the carb for damage, warping or plugged passages and jets. Air leaks in the engine will make the engine overheat. If the engine revs extremely high on its own this is an indicator for a air leak or a failed engine seal. If you add performance gear, ask around to find the best jet sizes for the respective part. Always consult a knowledgeable mechanic when changing the jets as they can affect the entire rev range of your engine. Post Thu May 12, pm. Quick links.
Check here for a list of various carb set-ups to help with jetting and all aspects of carb trickery! Previous topic Next topic 23 posts 1 2 3 Next. Post Tue Jan 06, pm Hi All, Basically, the idea behind this thread, is that we invite all forum members to post the settings they are currently using on thier scooters, in order to develop a database of information, that can be used by all visitors as a resource for learning and setting up thier own machines.
Please get involved and supply as much info as you can, you never know, you may need to use the resource yourself one day!! NOTE: Please don't ask technical questions or start discusions about carb settings within this particular thread, please start a NEW thread if you need to have a discusion.
This particular thread is for settings information only. So just add a reply below with your carb set-up and watch the list grow! Joined: 22 Sep Posts: Location: England. Fabio Dougie. Tue Jan 18, am link quote. Wiki Moderator. Thu Jan 27, pm link quote. Fri Mar 25, am link quote. Edited to correct a "typo" Fabio.
Sat Jun 18, am link quote.
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