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Yamaha XT500 TT500 SR400 & SR500 Titanium Racing Valve Spring Set 99-143

This complete competition racing valve spring set includes everything you need for blistering speed, such as the inner and outer springs retainers, tops, and keepers! They are good for cams up to 515 lift.
They are a perfect upgrade replacement for OEM part numbers:
90501-444455-00, 90501-31454-00, 256-12117-02-00, 256-12116-01-00