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View Full Version : 18s what sprocket size?


jbm0121
03-19-2007, 11:16 AM
im in need of a new front sprocket so i figured i would use it to compensate for my 18 inch tires

what size should i go to reach around stock gearing? or a little higher than stock gearing
Pipeless416
03-19-2007, 11:22 AM
Originally posted by jbm0121
im in need of a new front sprocket so i figured i would use it to compensate for my 18 inch tires

what size should i go to reach around stock gearing? or a little higher than stock gearing

what year do you have? older style, go up to a 16 tooth sprocket. thats as close as you can get without touching the rear sprocket. new style, move up to a 15.. i think. dont quote me on that one. :macho
OnTheEdge
03-19-2007, 11:24 AM
http://home.earthlink.net/~gellett/400ex.htm
jbm0121
03-19-2007, 05:14 PM
its a 2000
northwest Texas
03-19-2007, 06:25 PM
Stock 20's with 15/38 = 2.53
New 18's with 15/38 = 2.81
New 18's with 16/38 = 2.64

There's no way you're getting as tall unless you change the rear sprocket.

FYI 15/34 = 2.52 w/18's

I run a 15/35 = 2.59 w/18's and 2.33 w/20's
exrider49
03-19-2007, 07:29 PM
i run stock gearing on my 400 with 18s..try a 36 in the rear
ProComp
03-28-2007, 02:31 PM
since were talking sprockets, so if I have 22s on my 03 400ex with a 36 rear sprocket, I'm just killing the acceleration right?
Pipeless416
03-28-2007, 03:48 PM
Originally posted by ProComp
since were talking sprockets, so if I have 22s on my 03 400ex with a 36 rear sprocket, I'm just killing the acceleration right?

basically, yes.