400ex big bore!

[MK300racer7]

i want a kit like a 426 440 or 416 but i was wondering who makes a good kit but not that expenxive i will be racing mx and i will probally run fmf exhaust i was thinking fst?

[300ex_rider1121]

a lot of people use the 416 but i dont no....i pm u

sparks

[Crashmore 22]

Duncan builds a super good 440 kit, but it will set you back about 2700, but if you know one of their support riders you can get it for about 2400. It is a complete kit, carb, pipe, head work, piston, everything. IT IS A SUPER RELIABLE MOTOR.