The Wiseco piston set includes Hasting X rings, two wrist pins, and four circlips. The Piston set is .010 oversized and has a 9.5:1 compression. For a 3-1/2 bore. Pistons are forged from a high silicone alloy. 2009-UP XL 883 cylinders cannot be overboard to 1200cc. 2009-UP applications will require a separate purchase of 1200cc cylinders to be used with the piston kit. **Note: Run the engine at moderate speeds for at least 500 miles avoiding excessive running in lower gears to break in new pistons and rings appropriately.
- 1986 / UP XL