Are the wr and yz cams interchangable? Has anyone done it yet?
03 WR and YZ cam difference
Started by emcdan, Mar 04 2003 12:08 PM
2 replies to this topic
Posted 04 March 2003 - 12:47 PM
the '03 YZF and '03 WRF cams are NOT interchangeable per se. yes, they both fit into the head, but the result is a different relationship between the lobes and the auto-compression release.
in other words...
if you want auto-compression release AND YZF timing, you need a '03 YZF cam.
if you want auto-compression release AND WRF timing, you need a '03 WRF cam.
it is possible to rotate the '03 WRF cam one tooth and get YZF timing (a la the '01/'02 WRF cam mod), but the little nipple which opens the valve for compression release is then in the wrong place. so you can't have both features (YZF timing and auto-decompression) with the WRF cam. but so what -- it's $105 if you want to fix it.
jim aka the wrooster
'01 wr250f
in other words...
if you want auto-compression release AND YZF timing, you need a '03 YZF cam.
if you want auto-compression release AND WRF timing, you need a '03 WRF cam.
it is possible to rotate the '03 WRF cam one tooth and get YZF timing (a la the '01/'02 WRF cam mod), but the little nipple which opens the valve for compression release is then in the wrong place. so you can't have both features (YZF timing and auto-decompression) with the WRF cam. but so what -- it's $105 if you want to fix it.
jim aka the wrooster
'01 wr250f
