Keihin Chrome-Slide Idle Adjuster Spring

Keihin 1290-963-2000 is the idle-adjuster spring for the documented chrome-throttle-valve arrangements on PWK28, PWK33, PWK35, PWK36, PWK38 and PWK39 carburetors, with PWK41 retained as a historical application.

The spring works with the separately numbered chrome-slide idle adjuster within the idle-adjustment assembly. It is not the throttle-valve return spring. On the standard PWK33, this spring is shown at reference 30. Match the complete MPN and chrome-slide configuration because the standard-build PWK28 uses the different 1290-923-2000 idle-adjuster spring.

• Diagram reference — Standard PWK35: 30