As you see in the illustration, a float gauge is used to measure the float level. Carburetor kits no longer include this gauge, but have a measuring stick instead. Measure at the same points as in the illustration, but instead of the float gauge, use the measurement stick included in the carburetor kit, or other measurement instrument, such as a metal ruler.
The RBS carburetor used a black Nitrophy float and we recommend replacing this float each time you rebuild your carburetor. Nitrophyl floats tend to absorb fuel over time and without using a gram scale to measure the float, it is impossible to determine if the float is bad.
Fast Idle Adjustment
Choke Pull-Down Adjustment
The choke pull-down is used to open the choke valve slightly when tromping on the gas and the choke is closed (cold engine).
Bowl Vent AdjustmentBowl Vent Adjustment is used to keep the float bowl vented. Not doing so will cause gas to be siphoned into the carburetor bore.Hard starting when cold? Gas dripping into the bore? This may be the cause.
Accelerator Pump Adjustment
Adjust your accelerator pump. Out of adjustment can cause bogging when accelerating.