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Transmission ratios

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Here's my '98 YZ250's, they should be the same

Primary 21/63 (3.00) (crank to clutch basket)

1st- 14/27 (1.93)

2nd- 16/25 (1.56)

3rd- 18/23 (1.28)

4th- 22/24 (1.09)

5th- 21/20 (0.95)

Then your sprocket gearing on top of that

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Thankyou for the reply. Unfortunately the 97 is different. At lease I think it is ,because of the final drive difference. 97 is 13/49 and 98 is 14/50.

Again thankyou. Does any one else maybe know ?

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part numbers are identical >

97 >

4MX-17151-00-00 GEAR,5TH PINION

4XL-17131-00-00 GEAR,3RD PINION

4XL-17141-00-00 GEAR,4TH PINION

4JX-17121-00-00 GEAR,2ND PINION

4MX-17211-00-00 GEAR,1ST WHEEL

4XL-17251-00-00 GEAR,5TH WHEEL

4XL-17231-00-00 GEAR,3RD WHEEL

4XL-17241-00-00 GEAR,4TH WHEEL

93834-13207-00 SPROCKET,DRIVE 13T

93834-14049-00 SPROCKET, DRIVE

93834-15076-00 SPROCKET, DRIVE

98>

4MX-17151-00-00 GEAR,5TH PINION

4XL-17131-00-00 GEAR,3RD PINION

4XL-17141-00-00 GEAR,4TH PINION

4JX-17121-00-00 GEAR,2ND PINION

4MX-17211-00-00 GEAR,1ST WHEEL

4XL-17251-01-00 GEAR,5TH WHEEL

4XL-17231-00-00 GEAR,3RD WHEEL

4XL-17241-00-00 GEAR,4TH WHEEL

4XL-17221-00-00 GEAR,2ND WHEEL

93834-13207-00 SPROCKET,DRIVE 13T

93834-14049-00 SPROCKET, DRIVE

93834-15075-00 SPROCKET, DRIVE

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Thank you . I guess my final drive info. on the 98 was wrong.The trans must be the same from 96 to 98.

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