The pilot jet meters fuel at idle and just off idle, so it has the largest say in how cleanly your bike starts, idles, and pulls away from a stop. A blocked or wrong-sized pilot causes a rough idle, hard starting, and a stumble as you crack the throttle. Fit the correct size and your low-speed running cleans right up.

• Meters fuel at idle and low throttle
• Cures rough idle and off-idle stumble
• Match the size to your carb setup

Fits

• 1977-1978 Honda XL100