Kawasaki KX85 KX80 Phathead cylinder head kit 1991-2026 Chamber selection:K01 - 6.4cc Stock compression 5cc 110+

5cc    110+

T350  25cc +3

Use the Athena Big Bore Gasket

SX105  StockSX106 (100+ octane)SX107 (105+ octane)

Kawasaki KX85 KX80 Phathead cylinder head kit 1991-2026 Chamber selection:K01 - 6.4cc Stock compression 5cc 110+Kawasaki KX85 KX80 Phathead cylinder head kit 1991 2026 Our chambers are cut for the 85cc bore but work just fine with the 80cc bore as well. THey are slightly less compression on the 80cc bike but it is very close to the 85cc specs. Chamber selection: K01 6. 4cc Stock compression K02 6. 0cc (95+ octane) K03 5. 6cc (100+ octane) K04 5. 2cc (105+ octane) Phathead Kits include a head shell with one combustion chamber, two sets of o rings, cylinder head