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PhatheadRacing

Honda CR250 Phathead Combustion Chambers

Chamber selection
Bore spec
$60.00 USD
$60.00 USD
Sale Sold out
Shipping calculated at checkout.

1992-1996 / 2005-2007

H31  -  20.5cc Stock compression
H32  -   19.6cc (95+ octane)
H33  - 18.6cc (100+ octane)
H34  -  17.4cc (105+ octane)

1997-2004

HF21  -  17.4cc Stock compression
HF22  - 16.4cc (95+ octane)
HF23  -  15.5cc (100+ octane)
HF24  - 14.4cc (105+ octane)

2mm overbore mod $35