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†2005 400ex†
03-24-2007, 01:58 AM
Just thaught i would post a thread about some information that i came accross while reading my clymers service manual. I compared the new and old transmission specifications and found some interesting info...


Old Tranny ratios...

1st gear=2.916
2nd gear=1.937
3rd gear=1.473
4th gear=1.181
5th gear=1.0

Final Reduction ratio=2.533

New Tranny ratios.......

1st gear=2.727
2nd gear=1.789
3rd gear=1.363
4th gear=1.080
5th gear=.925
Reverse=2.428

Final Reduction ratio=2.785



I plugged these ratios into a gearing calculator that i found (heres the link)http://www.everything2stroke.com/resource/gear.php.
I found that the newer 400exs actually have higher top end speeds then the older models. I found this interesting because most people i talk to seem to think the older models have a higher top end speed since the new ones have 14 tooth front sprockets.

Anyway i just found this interesting and wanted to provide everyone with this info. I hope im not just posting on a subject thats already been braught up too much. Feel free to plug in the ratios and check for yourselves.:D

krt400ex
03-24-2007, 11:03 AM
cool