Suzuki RM80 RM85 Phathead cylinder head kit 1991-2025+ CR85 big bore kit **xs size is standard thickness

**xs size is standard thickness fabric

Stock (91+ octane)

cylinder and some stickers for your bike and tool box and installation instructions

HF22  - 16

Suzuki RM80 RM85 Phathead cylinder head kit 1991-2025+ CR85 big bore kit **xs size is standard thicknessSuzuki RM85 Phathead cylinder head kit 1991 2025+ the inserts are cut for the 85 bore which is . 5mm larger than the 80. Compression is nearly identical, slightly less with the 80cc motor. Chamber selection: S01 6. 9cc Stock S02 6. 4cc (95+ octane) S03 5. 9cc (100+ octane) S04 5. 6cc (105+ octane) 103cc 52 53mm big bore chamber 100+ octane for use with big bore piston Phathead Kits include a head shell with one combustion chamber, two sets of o rings,