The Hot Cams Valve Shim Kit is a must for any motorcycle to keep it running at full power.

• Hot Cams includes an labeled organizer to ensure accurate shim replacement.
• 7.48 mm and 9.48 mm kits:
• Include three (3) shims for each size ranging from 1.20 through 3.50 mm in 0.05 mm increments.
• 8.90 mm kit:
• Includes three (3) shims for each size ranging from 1.72 through 2.60 mm in 0.05 mm increments.
• 9.48 mm kit:
• Includes three (3) shims for each size ranging from 1.85 through 3.25 mm in 0.05 mm increments.
• 10.00 mm kit:
• Includes three (3) shims for each size ranging from 1.85 through 3.25 mm in 0.05 mm increments

• Note: Most 250cc 4-strokes use 7.48 mm OD shims, most 450cc use 9.48 mm OD shims, and KTM models use 10 or 8.90 mm OD shims.

If you are unsure of the size you can use Hotcams website to narrow it down http://www.hotcamsinc.com/ProductSearch.aspx