Flywheel question

What is the difference between the flywheel on the 03-05 450's, vs the newer bikes 06-09? They have different part numbers. I am looking for a heaver flywheel for my 250f, and if the newer 450 flywheels are heaver than the 03-05 450 flywheels then I can get them cheap. Otherwise I have to fork out $100 for a GYTR flywheel :thumbsup:

Well, by searching around on the GYTR site, I determined there is no weight difference at all period between the 250F and 450F flywheels...there all the same part numbers too! Exact same flywheels, so I bought a off road GYTR flywheel on e-bay for $55:banana:

The newer 450's use an "inside-out" flywheel form factor, like the WR's. NONE of the 450 flywheels will fit any YZ250F.

the 250F and 450F flywheels...there all the same part numbers too!

hmmm....not exactly....

GYTR® Off-Road Flywheel

Fits '06~'09 YZ450F

Adds 9.21 oz. for an inertia mass of 6.15 kg-cm² (stock inertia mass=3.8 kg-cm²)

GYT-2S297-50-50

Fits '06~'09 YZ250F

Adds 2.08 oz. for an inertia mass of 4.5 kg-cm² (stock inertia mass=3.8 kg-cm²)

GYT-5XC97-50-50

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now