Yamaha WR450 Close Ratio 5 Speed Gearbox

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This gearset is a direct replacement to the Yamaha WR450 5 speed motocross gearbox with the added advantage of undercut engagement dogs and road racing ratios.

 

This kit includes input shaft, output shaft and all loose gears

 

All circlips, bushes, washers and bearings are retained from the standard box.

 

Available With Superfinish

 

Gear Ratio

Nova Race Gearset                  % Drop              Yamaha Moto X Box

1st    16 - 27        1.688:1                                      1st    12 - 29         2.417:1
                                                )      27.3%                                                                )      28.3%
2nd   22 - 27        1.227:1                                    2nd    15 - 26          1.733:1 
                                                )      15.0%                                                                )      24.2%
3rd    23 - 24        1.043:1                                     3rd    16 - 21          1.313:1 
                                                )      11.8%                                                                )      20.0%
4th     25 - 23       0.920:1                                     4th     20 - 21          1.050:1   
                                                )         8.7%                                                               )      20.0%
5th     25 - 21       0.840:1                                      5th    25 - 21          0.840:1  
 

Overall Reduction 1st - 5th        50.2%              Overall Reduction 1st - 5th         65.2%

 

To find out about availability or to order this product or for further information please click here

 

Batches available to order - P.O.A

	Nova Yamaha WR450 Close Ratio 5 Speed Gearbox