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I've done a bunch!
I have crates full of gears!
As a racer I can tell you changing gearing can be confusing.
You don't always get what you hope for!
Unless you are adding 50hp you may not even feel it?
 

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I had thought about doing it with the '97 Indy 500 I have but was told don't bother by people. That is just one thing I never got into even when I had sleds with more HP.
 

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I leared way back when they first came out, most of the sleds from Yamaha come over geared!
If all you did was run glare ice they were good!
Dropping a tooth on a 94 Vmax 600 it went from toping out at 90 to 96!
Yep it picked up 6mph by loosing a tooth on bottom, which should have slowed it down,
But instead gave it enough power to pull the clutching and more of a full shift!

So to original poster, mark your helix in driven clutch with a sharpie and when you do the gear swap, see how much farther it shifts!
If you have a GPS do a mile run with both gearing and see what you get!
 

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Discussion Starter #24
I"m trying to remove the driven gear and the bolt is really tight and I want to verify it is a standard right hand thread?
 
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