Flywheel question

3 replies to this topic
  • intensem1rider

Posted January 18, 2009 - 07:49 PM


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:

  • intensem1rider

Posted January 18, 2009 - 08:14 PM


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:

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  • grayracer513

Posted January 18, 2009 - 08:15 PM


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

  • DPW

Posted January 19, 2009 - 03:33 AM


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)

Fits '06~'09 YZ250F
Adds 2.08 oz. for an inertia mass of 4.5 kg-cm² (stock inertia mass=3.8 kg-cm²)

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