I don't know because I'm the one who posted the question but at least now people will see it. =)
it stops you from getting to many r.p.ms turning your engine and over heating it.
Idle speed is set by the PCM and is not adjustable. The screw you are fiddling with is just the stop screw to adjust the initial throttle plate position, it should not be used to attempt to adjust the idle.
Could be that the throttle plate (in throttle body) is stuck open. Try to "free up" by sticking a screw driver into throttle body
step one: prop the fuel tank up to access the throttle lever assembly (left side) step two: trace your throttle cable down to where they go around the throttle lever (more like a pulley) twist the throttle, you'll see this lever rotate step three: locate the idle adjuster screw, its a small stop screw that keeps the throttle lever from turning completely to the full-close position. step four: by turning this screw in, the idle rpm should increase. sorry im no mechanic, but thi
the base idel screw in on the bottom of the throttle body.. there should be a cap over itWhile there is a screw, it is more properly an idle stop screw, more than an idle adjustment screw; since the idle is controlled electronically by the SMEC (Single Module Engine Control) through the AIC (or AIS) valve mounted on the Throttle body. The screw that our friend refers to, is used in the factory to crack open the butterfly or throttle plate, but it should not be further adjusted. Instead, find the cause why Idle is not between 700-900 RPM. Possible causes are a dirty AIC valve, or an sticking one; or a wiring intermittent contact at the AIC valve connector; or a cracked insulation on the engine speed sensor, or even a failing throttle position sensor. Amclaussen.
Adjust the throttle stop screw located on the side of the carb that has your throttle linkage connected to it.
on the carb there is a plate that moves when you throttle up and returns to a stop screw when throttled down. This stop screw is the idle adjustment, turn it in until you reach your desired idle rpm.
There's a small screw inside the stop motion screw on the balance wheel of the machine. Make sure you're not loosening that screw. The part to loosen is the silver "wheel" within the balance wheel, not the screw that holds the silver wheel in place. Be sure to check the small screw that holds the silver wheel in place and make sure it is tight. If the screws and wheels check out ok, you may have a stripped the threads on the stop motion screw causing it to continue to turn and not tighten.
Raptor 50's are a youth atv. The factory has a throttle stop screw at the throttle lever. There is also changes to the throttle arm and carb slide that prevents attaining full throttle. Lastly the stock CDI box has a rev limiter.
I think your asking how to restrict the speed of a 50cc. mini bike, you can do this with the throttle cable, adjust the cable to only open the carburetor 1/2 (half) way. If you mean how to UN-restrict the bike, the usual way is with a throttle stop, simply loosen the cinch nut and back off the stop until you achieve full throttle, and retighten the cinch nut.
Possibly fix the vaccuum leak !!
I think your asking how to restrict the speed of a 50cc. mini bike, you can do this with the throttle cable, adjust the cable to only open the carburetor 1/2 (half) way. If you mean how to UN-restrict the bike, the usual way is with a throttle stop, simply loosen the cinch nut and back off the stop until you achieve full throttle, and retighten the cinch nut.