06 YZ 450 Total Drive Ratio Calculations


1 reply to this topic
  • aford541

Posted February 05, 2006 - 10:39 PM

#1

I figured I'd Post it and let you all comment on it I think Im going to try the 14/50 combination next time out, I think it will make the bike a little easier to ride but then again who knows.

Stock Gear Total Drive
2006 YZ 450 Gear ratios Ratios Ratio
Primary-61/23 (2.652) 2.652
1st- 27/14 (1.929) 1.929 8.35
2nd- 23/15 (1.533) 1.533 7.95
3rd- 23/18 (1.278) 1.278 7.70
4th- 24/22 (1.091) 1.091 7.51
5th- 20/22 (0.952) 0.952 7.37
sprockets 13/49 rear. 3.769
Gear Total Drive
2006 YZ 450 Gear ratios Ratios Ratio
Primary-61/23 (2.652) 2.652
1st- 27/14 (1.929) 1.929 8.22
2nd- 23/15 (1.533) 1.533 7.83
3rd- 23/18 (1.278) 1.278 7.57
4th- 24/22 (1.091) 1.091 7.39
5th- 20/22 (0.952) 0.952 7.25
sprockets 14/51 rear. 3.643
Gear Total Drive
2006 YZ 450 Gear ratios Ratios Ratio
Primary-61/23 (2.652) 2.652
1st- 27/14 (1.929) 1.929 8.15
2nd- 23/15 (1.533) 1.533 7.76
3rd- 23/18 (1.278) 1.278 7.50
4th- 24/22 (1.091) 1.091 7.31
5th- 20/22 (0.952) 0.952 7.18
sprockets 14/50 rear. 3.571
Gear Total Drive
2005 Yz 450 Ratios Ratio
Primary-61/23 (2.652) 2.652
First 27/14 1.929 8.22
Second 25/16 1.563 7.86
Third 23/18 1.278 7.57
4th. 21/20 1.05 7.34
sprockets 14/51 rear. 3.643

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  • Chas_M

Posted February 06, 2006 - 01:12 AM

#2

I don't understand how the last set of numbers in each series was derived or what they signify?

For instance, to determine the overall ratio for a given gear, let's say 1st and 5th gears with 13/49 sprockets: (Primary)2.652 X (Secondary)3.769 X (1st gear)1.93 = 19.28 and 2.652 X 3.769 X (5th gear)0.909 = 8.06





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