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View Full Version : 450r valve adjustments??



yfz450bk
04-22-2007, 09:04 AM
Does anyone have pic by pic instructions on checking/ adjusting the valves on a 450r? Thanks for the help.

YZ400EX
04-22-2007, 10:09 AM
I found this while searching awhile back.. This will do the trick..

http://webpages.shepherd.edu/ghott01/valveadjustment/valveadjustment.html

Rulz
04-22-2007, 11:00 AM
http://www.hotcamsinc.com/index.cfm?fuseaction=cMedia.viewInstallationVideos

yfz450bk
04-22-2007, 12:33 PM
Thanks a lot.:D

Knarf0486
04-24-2007, 06:39 AM
Do the stock shims wear out over time or do you only have to re-shim when you modify your machine. There isn't a way to adjust them like on the 400ex is there? Just reshim? Im just a little confused on that.

400exrider707
04-24-2007, 06:42 AM
Originally posted by Knarf0486
Do the stock shims wear out over time or do you only have to re-shim when you modify your machine. There isn't a way to adjust them like on the 400ex is there? Just reshim? Im just a little confused on that.

No you cant simply adjust them like the 400ex, however once you do adjust them using the shims, they tend to stay in clearance a lot longer. The stock shims dont really wear out, they are hardened. The hotcams shims are softer, with a hardened coating on them, so they will wear out easier with a big over-lap cam though.