Throttle spring for Keihin PWK carburetors.
Genuine Keihin high quality part.
Keihin part number: 1290-920-2000 / 018-531.
This fits:
- Keihin PWK38 carburetors
- Keihin PWK38 quad vent AirStriker carburetors
- Keihin PWK39 carburetors
- Keihin PWK41 carburetors.
Complete as pictured.