JIMS - Compression Release Valve Kits

Give your starter a hand by installing these in your high-compression, big-inch motor. These need to be installed by an experienced mechanic/machinist.

Specifications

• Can be installed in all Big Twin, XL and Buell motors
• Fits dual-plug heads or heads that have been machined for dual plugs
• Requires a 10mm × 1.0mm drilled and tapped hole in your cylinder head for use.
• Made in USA.