HINSON Hi-Temps Clutch Spring Kit (manufacturer part number: CS357-5-0109) — springs designed for motocross bikes, built to withstand the extreme conditions of modern four-strokes. Designed by HINSON and made in the USA, these springs combine temperature resistance and consistent return for more predictable clutch behavior on the track.

• High-temperature steel: resistance to loss of strength during heat buildup.
• Optimized grip: better bite and consistency of the engagement point without excessive thermal buildup.
• Tight production tolerances for repeatability and reliable installation.
• Developed to be compatible with Hinson components and designed to enhance the performance of the stock clutch.
• Compatible with most OEM parts, unless otherwise specified by the manufacturer.
• American made: quality control and premium materials.

Ideal for demanding motocross riders looking to enhance clutch control and lever feel. Recommended part number for models such as the Suzuki RM-Z 250 (2026) and Kawasaki KX 250 / KX 250 X (2024). Be sure to check compatibility with your clutch housing before installation.