Honda CR125 2005-2007 Phathead cylinder head kit Color:Blue KX42 - 6

KX42  - 6

5cc    110+

Search compression release button for replacement Kibblewhite button

6cc  (100+ octane)K53 - 38

Wash warm and hang dry to retain best fit

Honda CR125 2005-2007 Phathead cylinder head kit Color:Blue KX42 - 6Honda CR125 Phathead cylinder head kit 2005 2007 Chamber selection: K10 Stock K11 9. 2cc (95+ octane) K12 8. 5cc (100+ octane) Phathead Kits include a head shell with one combustion chamber, two sets of o rings, cylinder head nuts, copper washers, some stickers for your bike and tool box and installation instructions.. Phathead cylinder heads are made of 6061 T6 billet aluminum. The material is stronger and transfers heat better than cast aluminum.