Kawasaki KX250 Phathead Combustion Chambers

Chamber selection:

2005-2007

W21 -  21.6cc Stock compression
W22 - 20.2cc (95+ octane)
W23 - 19.4cc (100+ octane)
W24 - 18.3cc (105+ octane)

1995-2002

K21 -  21.6cc Stock compression
K22 - 20.2cc (95+ octane)
K23 - 19.4cc (100+ octane)
K24 - 18.3cc (105+ octane)