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Ships within 48 hours · Estimated delivery Sep 10 - Sep 15
6cc 95+ octane
KTM300SX 2023+ Phathead cylinder head kit
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and red will restock mid 2023
Our chambers are cut for the 85cc bore but work just fine with the 80cc bore as well
Yamaha YZ250 combustion chambers Chamber Selection:Y22 - 20.1cc (100+ octane) 6cc 95+ octaneChamber selection: 1999 2022 Y20 22cc Stock compression for the X model Y21 21. 1cc Stock (91+ octane) Y22 20. 1cc (100+ octane) Y23 19. 1cc (105+ octane) 1999 2022 big bore chambers: YZ295 24. 8cc 72mm 93 octane Revised squish clearance . 055" YZ296 24cc 72mm 100 octane Revised squish clearance . 055" 1988 1998 Y30 stock Y31 (95+ octane) Y32 (100+ octane) Y33 (105+ octane)
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