Honda CR500 Phathead Combustion chambers YZ250 part numbers from HotRods are
Description
part numbers from HotRods are 4166(2006-2021) and 4116 (1991-2005)
CX50 stock compression
Compression release replacement brass fitting for Phathead
8cc (105+ octane)
CR500 models 1999 and older
Honda CR500 Phathead Combustion chambers YZ250 part numbers from HotRods areChamber selection: HN50 66. 4 Stock compressionHN51 64. 4cc (95+ octane)HN52 62. 5cc (100+ octane)HN53 60. 8cc (110+ octane)
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