Carburetor Assembly Instructions Last Updated: 07/24/2017
This is how to install a throttle cable on all slide style carburetors.
The spring is placed inside the cylinder slide and is compressed when the throttle is twisted. Be sure it is seated all the way inside the cylinder. The spring then forces the throttle to return. For this to work properly the throttle must twist freely on the handle bar in both directions prior to the cable being installed.
Install twist grip throttle on right side of handlebar end. On some handle bars it may be necessary to ream out the handle ID to fit the bar so that the throttle will twist freely. It never hurts to add a few drops of light wt. oil to let trickle down the cable inside the full length of sheathing.
After installing cable inside the carburetor you are ready to mount it on engine intake tube and tighten clamp screw. Mount engine so carburetor sets as level as possible.
1. Note: Factory Sealed Air /Fuel ratio screw. Factory set by turning adjustment screw to closed position and then opened ¾ turns outward or less than 1 full turn before it was sealed with epoxy.
2. Jet Needle comes with clip set in position #2 from the top. Different positions may be required to make your engine run correctly depending on altitude above sea level and fuel economy desired. If a more rich gas mixture is required you can move the jet pin “pac man” clip to the next lower position notch.
SPEED CARB Note: Jet Needle comes with clip set in position #3 from the top. Different positions may be required to make your engine run correctly depending on altitude above sea level and fuel economy desired. If a more rich gas mixture is required you can move the jet pin "pac man" clip to the next lower position notch.
1, 2, 3 Assembly
Unscrew top of carb and remove all the parts
Large C Washer
Needle w/ Small C Clip
Run Throttle Cable threw the Screw top, then Spring. Place needle in slide and large C washer on top of needle. Run the cable along the slit on the slide and locks in place.
Insert back into carb with the slit lining up with guide pin in the carb. The idle indent in the slide should face the idle screw. Tighten the screw top down, don't use tool to tighten, over tightening can make slide stick.