KEIHIN Jet Needle PWK / PJ / PWM - MCJ Type

KEIHIN offers this carburettor needle. The needle is a thin tapered rod fixed to the carburettor slide: when you open the throttle, it rises and uncovers a bigger and bigger passage for the fuel.

Why change the needle?

The benefits:

• Get precise metering back by replacing a worn or bent needle.
• Switch to a different profile to match the carburation to an exhaust, a filter or an engine build.
• Cure an engine that hesitates or lacks pick-up between a quarter and three-quarter throttle, where the twistgrip spends most of its time.

Why choose KEIHIN?

Keihin, founded in Japan in 1956 and long nearly half-owned by Honda, supplies original equipment to Honda as well as Suzuki, Kawasaki and KTM; its FCR carburettor, whose flat slide runs on roller bearings, was developed in Superbike racing.

When should you replace this part?

A needle that is scratched, bent or worn oval on its tapered section, or a clip with play: the mid-throttle mixture becomes imprecise and fuel consumption rises.

Specifications and fitting tips

• Manufacturer part number: N427-48MCJ

Cross-Mania tip: Fit the clip in the same groove as on the original needle, then move it one notch at a time: clip lower on the needle = richer mixture, clip higher = leaner.

Compatibility

Universal part: check the dimensions given before ordering.