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2007 450EXC Transmission Gear Ratios

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Does anyone know if the 2007 450EXC has the same transmission gear ratios as the 2008 - 2011 450EXC?

Thanks.

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They are very close. The '08 and newer EXC's have slightly lower 1st and 2nd gears hence are slightly wider overall with a wider gap between 2nd and 3rd.

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I thought they were identical, but a quick inspection confirms that they are not. Also remember that unlike rfs 450-525, xc4 450 and 530 have different stroke which affects how engine behaves more than rfs's different bore.

RFS XC4

Primary both 33:76

1st 14:34 14:36

2nd 17:31 17:32

3rd 19:28 19:28

and so on, rest are the same

IMO rfs transmission is wide enough. Too wide for street, 1st is useless no matter what gearing and personally I'd like taller first even offroad.

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Latest gearing expressed as approximate top speed in gears.

Solid lines are stock. Dashed line represents a change in sprockets or rear tire size.

270780_1810297391758_1669694585_1194458_7822680_n.jpg

Ron Daniels

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Also remember that unlike rfs 450-525, xc4 450 and 530 have different stroke which affects how engine behaves more than rfs's different bore.

The XC4 450 has a shorter stroke than the RFS 450 EXC, but the RFS 525 and XC4 530 have the same bore and stroke.

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