Re: WTB: Tillotson ML5B carburetor
Hi Chopperjoe,
The Tillotson ML5B has 3 adjustments. The adjustable main jet is the "wing nut" needle adjustment at the bottom of the carburetor. Another adjustment is located on the side of the carburetor and has a spring on the adjustment shaft, this is the low speed adjustment. And the final adjustment is the idle set screw where the cable attaches to the carburetor.
Start by turning the main jet in until it bottoms out, [DO NOT over tighten] then open approx 3/4 to 1 turn. Start motor and let warm up, then adjust while riding at wide open throttle to maximum speed [RPM]. The low speed jet [air/fuel] is adjusted for maximum idle speed, then back out a very small amount [1/32 of a turn]. Then set the mechanical idle screw for approx 900 to 1000 RPMs at idle [don't set too low as it is an oil splash system].
Hope this helps.
Have fun,
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