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View Full Version : 250R MX cylinder kit



matt250r21
01-27-2008, 04:54 PM
This cylinder is a nikasil aluminum sleeve, similar to a Duncan Racing Hyperdyne set up. Very neat setup. Advantges are less sleeve wear, better heat transfer, lighter weight and less friction over a old style steel sleeve. Cylinder was done by APX Racing, ported for mid to top MX. Comes with the nikasil cylinder, Pro Design o-ringed cool head (no head gaskets used) w / 19cc dome, ESR billet exhaust flange, 4.5mm base spacer plate, reed spacer, 86 250R style piston kit, and Pro Design inline cooler/ top rad hose. Open to offers.

matt250r21
01-27-2008, 04:55 PM
port work and sleeve

matt250r21
01-29-2008, 10:07 AM
bump