Stock Gearing and Gear Ratio Charts

I found these charts and thought they might help answer other member’s questions that I have also had.

GearRatioChart001.jpg

StockGearingChart.JPG

That's cool, but it's calcuated for an '04 with the 2.818 primary ratio. The '05/'06 has a 2.625. If you multiply the results by .93 you'll be right, but only for the 4 speed.

The 05 YZ450 also has a 51 tooth rear sprocket stock.

This is the calculator I use.

Calculator

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