The Kibblewhite "Lightweight Race" spring kit (manufacturer part no. 40-41600) provides a robust solution for demanding cross and enduro preparations. Designed for high-performance camshafts and lifts exceeding stock, this kit combines dual springs made from Cr-Si alloy and machined retainers to maintain control of the valve train at high RPM without compromising reliability.
- Main features:
- Application: intake & exhaust
- Spring height: 0.450
- Imperial spring lift: 0.450
- Spring material: silicon-chrome alloy (Cr-Si)
- Retainer material: CNC machined titanium or treated high-tensile steel
- Model: Lightweight Race
- Kit contents:
- 2 x Cr-Si intake springs
- 2 x Cr-Si exhaust springs
- 2 x titanium intake retainers
- 2 x titanium exhaust retainers
- 2 x high-tensile steel intake base washers
- 2 x high-tensile steel exhaust base washers
- Usage & benefits:
- Increased spring rates to limit valve float at high RPM.
- Compatibility with high lifts: suitable for race camshafts and reinforced settings.
- Manufacturing ensures repeatability and mechanical integrity for intensive off-road use.
Ideal for enduro riders and cross competitors, this kit is frequently fitted to KAWASAKI KX 250 X Cross Country (2023), KX 250 (2023), and KX 250 F (2020). Made in the USA. Manufacturer reference: 40-41600.