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CF Moto Big Bore Kit
CN250 280/290cc cylinder Kit 78mm with piston rings and gaskets.
it was a good run but no longer offered. I had these kits from 2004 -2012...they did not sell well at all..Stock 72mm no problem which is an upgrade from 69mm which is a lot of scooters and atvs that are NOT CF Moto or Hammerhead...BTW there is has never beeen a CF250 this is a myth these are all CN250 Honda design engines, the 69mm cylinders would be a Roketa or very off brand chinese...the company that was having these made is log gone.
These have been tough to get along with the forged kit we offer but this one is a little less and gives the power you are looking for from the CN250 used in everything from scooters such as Jonway YY250T to the CF Moto V3/V5 plus Hammerhead and Kinroad 250 go carts which really get a boast.
Can be used with stock head and cam. Adding an exhaust is a huge plus and doing trans at same time will give you a machine thats getting speeds of 75 when you need it. Alot of people claim 75 with stock parts but I doubt these speeds due to speedometers being not to correct on a lot of the Jonway scooters. The CF Moto bikes tell true speeds better.
Fuel and air and exhaust are most important when installing this kit. Adding a larger carb is best but you will get results with larger main jet and UNI Dual Layer air filter or cold air intake.
48 Lower States Only