The Cylinder Works kits have been great for the 250s, however when a new engine comes out the time to get a new model made can take a while. So, for this model we went to Millennium Tech for a bore and re-plate. The stock OEM KTM 250 cylinder has plenty of meat to make it bigger (safely)—so we went over 3mm.
Millennium Tech Strip, bore and re-plate to 81mm www.mt-llc.com 920-893-5595
Vertex Pistons Big bore 81mm Piston kit www.vertexpistons.com 515-270-2302
Cometic Gasket Top End engine gasket kit www.cometic.com 800-752-9850
FMF Racing RCT 4.1 Muffler and Ti Megabomb header www.rockymountainatvmc.com 800-336-5437
CV4 Silicone Coolant hoses and High pressure radiator cap www.rockymountainatvmc.com 800-336-5437Renthal Rear sprocketR1 Works Chain, Fat Bar’s www.rockymountainatvmc.com 800-336-5437
VP Racing Fuels U 4.4 – mixed half and half with 91 pump www.vpracingfuels.com 210-635-7744
Uni Filter Two-Stage Air Filter www.rockymountainatvmc.com 800-336-5437
Dunlop Tire MX51 front 80/100-21 MX 31 rear 110/80-19 www.rockymountainatvmc.com 800-336-5437
DeCal Works Semi-Custom Graphics kit with #’s www.decalmx.com 815-784-4000
