Posted December 17, 2006 - 09:35 PM
Posted December 17, 2006 - 10:12 PM
I don't know why they have the exhaust cam timing the way they do on the WR's when YZ exhaust cam timing is so much more awesome! The YZ exhaust cam provide an awesome mid range punch and makes riding the bike so much more fun.
What is the low-down on YZ cams for WR's? I've heard about them, and read a lttle but not sure about how much they improve the bike. Anybody installed them? How difficult? Price? Overall worth it? Any info appreciated.
Installation is extremely easy, they cost ~$90. Worth it? You bet ya!
Posted December 17, 2006 - 10:16 PM
The bike seems to rev-out a little more and the powerband hits a little harder.
Cost is anywhere from $125 - $200
Installation is not difficult, but time consuming - about 1.5 hours
Pros: A little harder hit, faster revving (or at least feels that way)
Cons: None that I have found so far. Other say it looses its tractability in the slick stuff, but throttle and clutch controll can solve that.
Posted December 17, 2006 - 10:33 PM
Posted December 18, 2006 - 05:13 AM
Posted December 19, 2006 - 06:18 PM
Posted December 19, 2006 - 07:27 PM
I was told by a local dealer that you could advance the exhaust cam timing one tooth and then it would be the same as the YZ. Anyone know if that is true?
Nope. The pre '03 WR's could do that but if you do it on the '03 -'07's the auto decomp will not work correctly. Do a search. There's lot's of info on this.
Posted December 20, 2006 - 06:14 AM
8mm socket and small wrench.
Any special knowledge or tools needed for this job ?
Maybe torque wrench for the 4 cam cap bolts, but not necessary.
Job is very easy. Just read your manual first. Set your bike up as you would check valve clearances, then take out the auto chain tentioner. Take the cam cap off (watch for cam clip!) and cam comes out.
Posted December 21, 2006 - 07:17 AM
Posted December 21, 2006 - 02:00 PM
I have a 06 wr 450. I had a shop retard exhaust cam now engine makes loud timing type noise. Any one heard of this.
I Guess You did not read the sticky note at the top of the forum!
"A word to Newbies"
There are three threads for you to read (soon) at the top of this forum:eek:
If the Yamaha Dealer really did that you might not want to go back.
Posted December 21, 2006 - 08:35 PM
Posted December 22, 2006 - 09:37 PM
Posted December 23, 2006 - 04:15 PM
I put a yz cam in mine, had to jet her some more to get her to start fine with the magic button, but worth it, she wheelies much better now........
What jets did you change? I have a YZ cam sitting on my bench collecting dust because the e-button wouldn't start the bike reliably anymore. Would love to put the YZ cam back in, but don't want to sacrafice the button.
Posted December 23, 2006 - 05:30 PM