I was messing around on http://www.gearingcommander.com/ and I tried my best to collect accurate information about gearing on my motorcycle. I figured I would post the data in case anyone else was interested in using an online calculator.
Most of this information is in your repair manual, but I was not able to find a primary drive ratio. The numbers posted here were derived from photos I found on ebay. I counted the teeth on the primary drive gear and primary driven gear very carefully.
The purpose of this post is just to save someone time in the future. If anyone else has the desire feel free to add information about other models or correct me if my information is wrong.
This information below is labeled in excess to help anyone not familiar with where these numbers are coming from.
1978 xs400 2e
primary drive ratio 3.25
primary drive gear on crank 24 teeth
primary driven gear on clutch basket 78 teeth
1st gear 2.500:1 or 35/14
2nd gear 1.777:1 or 32/18
3rd gear 1.380:1 or 29/21
4th gear 1.125:1 or 27/24
5th gear 0.961:1 or 25/26
6th gear 0.866:1 or 26/30
final drive ratio 16/37
front sprocket 16 teeth
rear sprocket 37 teeth
stock tire size
front 90/90/18
rear 110/90/18
the stock chain is a 530x98, so 5/8" is the pitch
5/8 = 0.625
0.625" = 15.875 mm
98 links
max rpm (redline) is 9250
Most of this information is in your repair manual, but I was not able to find a primary drive ratio. The numbers posted here were derived from photos I found on ebay. I counted the teeth on the primary drive gear and primary driven gear very carefully.
The purpose of this post is just to save someone time in the future. If anyone else has the desire feel free to add information about other models or correct me if my information is wrong.
This information below is labeled in excess to help anyone not familiar with where these numbers are coming from.
1978 xs400 2e
primary drive ratio 3.25
primary drive gear on crank 24 teeth
primary driven gear on clutch basket 78 teeth
1st gear 2.500:1 or 35/14
2nd gear 1.777:1 or 32/18
3rd gear 1.380:1 or 29/21
4th gear 1.125:1 or 27/24
5th gear 0.961:1 or 25/26
6th gear 0.866:1 or 26/30
final drive ratio 16/37
front sprocket 16 teeth
rear sprocket 37 teeth
stock tire size
front 90/90/18
rear 110/90/18
the stock chain is a 530x98, so 5/8" is the pitch
5/8 = 0.625
0.625" = 15.875 mm
98 links
max rpm (redline) is 9250
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