Std Pistons with 8.5:1 Compression Ratio. Fits Big Twin 1941-1979 with 1200cc Engine. BAI-51-0609 This Coastal Moto Disc ONLY

This Coastal Moto Disc ONLY fit a Coastal Moto Wheel & include mounting hardware

Planning on laying down some rubber and wheelieing the entire interstate

* Covers Stock Nylock Nut

# BAI-F51-0215 - New Chrome Fender Struts

Std Pistons with 8.5:1 Compression Ratio. Fits Big Twin 1941-1979 with 1200cc Engine. BAI-51-0609 This Coastal Moto Disc ONLYFeatures & Benefits: * Bore = 3. 437" * Stroke = 3. 969" * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled engines. * Low thermal expansion rate = tighter piston to cylinder clearance. * Complete kit includes: two pistons, rings, wrist pins and clips. * Replaces OEM # 22141 55B * Replaces OEM # 22141 74A Tech Tips: * Follow Ring End Gap & Piston to Cylinder Clearances as per the supplied Manufacturers Instructions.