15-21 Yamaha R1 81mm 13.5:1 CP Piston Kit
Piston Kit Includes:
-4 Pistons
-4 Piston Ring Packs
-4 Wrist Pins
-8 Wrist Pin Circlips
CP Pistons are High Performance Forged Aluminum Pistons. We prefer and recommend CP Pistons in all High Performance Applications.
Pistons are a Lightweight Windowed Boxed Forging with Underhead Milling.
Pistons have 13.5:1 Compression and are recommended to be ran with Minimum 100+ Octane Race Fuel.
Big Bore Pistons require Boring and Replating Cylinder. JSD Machine Works can Bore your Cylinder and Replate (Cylinder Replating is performed by Millennium Technologies) if needed. Please Contact Us for Pricing.