Author Topic: Heavier or lighter flywheel better for Dirt Track?  (Read 2512 times)

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Offline mboddy

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Heavier or lighter flywheel better for Dirt Track?
« on: July 05, 2008, 07:40:24 pm »
I am building my 400 Dirt Track bike.
I have a choice of a IT400D flywheel or a lighter YZ400D flywheel.
Which is better for Dirt Track?
Vinduro Penrite Team
1980 Yamaha IT125G, 1979 Yamaha IT175F, 1984 Yamaha IT200L, 1977 Yamaha IT250D and IT400D

Offline Noel

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Re: Heavier or lighter flywheel better for Dirt Track?
« Reply #1 on: July 05, 2008, 08:11:23 pm »
Depends Who you talk to.
But I think  the theory is that a heavy flywheel calms the revs a bit to give better drive without spinning up the back wheel
Maybe It would depend on the track surface?
Cheers
Noel

mx250

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Re: Heavier or lighter flywheel better for Dirt Track?
« Reply #2 on: July 05, 2008, 08:54:40 pm »
I'm with Noel - depends on your style/preference and track conditions. Either experiment to find what you like or set it up to quickly go from one to the other.

Offline pancho

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Re: Heavier or lighter flywheel better for Dirt Track?
« Reply #3 on: July 07, 2008, 09:09:12 am »
i agree with noel plus lighter fly wheels make it harder to hold a smooth slide they tend to chop in and out of the slide as they break traction and then regain it
dont follow me i'm probably off line!

Offline YUMASTEPSIDE

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Re: Heavier or lighter flywheel better for Dirt Track?
« Reply #4 on: July 09, 2008, 08:35:03 am »
I use a ported Matador motor and the heavier enduro flywheel makes it pull like a freight train out of the corners and makes it very smooth to ride compared to the pursang motor.

                 Roger

Offline mboddy

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Re: Heavier or lighter flywheel better for Dirt Track?
« Reply #5 on: July 13, 2008, 05:47:05 pm »
Thanks guys. I'll go with the IT400.
Vinduro Penrite Team
1980 Yamaha IT125G, 1979 Yamaha IT175F, 1984 Yamaha IT200L, 1977 Yamaha IT250D and IT400D