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Flat Track Motorcycle
Springs designed specifically for Flat Track Motorcycles

The Swift Flat Track Motorcycle springs are made to be extremely light weight. They were carefully designed and tested with Boughner Racing. We utilized a specific material formula that helps decrease harmonic vibrations and stays as compliant as possible with course conditions.
ID 2.25" - 8" LENGTH

Part # Spring Rate Usable Stroke Max Stroke Max. Load Weight
kgf/mm lbs/inch mm inch mm inch kg lbs kg lbs
080-225-350F 6.3 350 88 3.5 136 5.4 849 1,872 0.96 2.12
080-225-375F 6.7 375 89 3.5 132 5.2 884 1,949 1.05 2.31
080-225-400F 7.1 400 90 3.5 128 5.0 912 2,011 1.15 2.54
080-225-425F 7.6 425 89 3.5 126 5.0 956 2,108 1.20 2.65


ID 2.5" - 8" LENGTH

Part # Spring Rate Usable Stroke Max Stroke Max. Load Weight
kgf/mm lbs/inch mm inch mm inch kgf lbs kgf lbs
080-250-325F 5.8 325 88 3.5 147 5.8 852 1,878 0.89 1.96
080-250-350F 6.3 350 88 3.5 144 5.7 899 1,982 0.97 2.14
080-250-375F 6.7 375 89 3.5 141 5.6 943 2,079 1.06 2.34
080-250-400F 7.1 400 87 3.4 140 5.5 997 2,198 1.10 2.43
080-250-425F 7.6 425 86 3.4 138 5.4 1,047 2,308 1.15 2.54
080-250-450F 8.0 450 87 3.4 134 5.3 1,080 2,381 1.25 2.76

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