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HINSON Hi-Temps Clutch Spring Kit (Manufacturer part number: CS663-1-2101) — a set of springs designed for demanding motocross riders. HINSON is a benchmark in competition, adopted by numerous factory teams and top-level riders such as Eli Tomac, Ken Roczen, Cooper Webb, Tim Gajser, Jeffrey Herlings, Jeremy Seewer, Chase Sexton, and Joey Savatgy.
Springs made of high-temperature steel, designed to withstand the loss of strength due to heat from modern four-strokes.
Formulation and geometry aimed at providing a consistent grip while minimizing heat buildup.
Tight production tolerances for repeatability and precise fit in the clutch basket.
Developed for use on Hinson components as well as, unless otherwise specified, with stock clutch parts.
Designed and manufactured in the United States.
Ideal for motocross and off-road practices, this kit is aimed at riders seeking a reliable and smooth clutch feel under race conditions. Check compatibility with your model before installation — mentioned among others on Kawasaki KX 450 (2022, 2026) and KX 450 X (2026). For serious maintenance or preparation of your transmission, these Hinson springs are a high-performance and proven option in competition.
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