'03 WR450F Woodruff Key Blues
Posted February 12, 2003 - 01:16 PM
I just thought your company should be aware of the concerns of the newest WR 450F owners. This is a link to Thumper talk.com. There have been alot of failures of the woodruff keys on the flywheels and many prospective customers are doubting the reliability of your product.
Thank You for your time
Posted February 12, 2003 - 04:06 PM
I own a 2003 Yamaha WR450 VIN # JYACJ04323A000641.
Purchasing Dealer, Extreme Powersports (989)732-4331
Has it been recalled for possible woodruff key failure?
Is there A sevice bulliten pertaining to woodruff key failure?
Thank you for your consideration,
Posted February 12, 2003 - 04:26 PM
I still have my XR400 for backup.
Posted February 12, 2003 - 04:35 PM
hmmmm...can i borrow the XR50 ?????
Posted February 12, 2003 - 04:40 PM
Yes it might be a Yamaha problem,no a 6 thousand dollar dirt bike should not have this problem .But it does.It is a easy fix and I would rather have my bike and fix it myself and go riding than wait for Yamaha or dealer to decide there is a problem.Jet it so it doesn't backfire(thanks for the info Utvols,keep it comming)Lap,loctite and torque the fly wheel
then go ride the heck out of it!
Since I fixed mine three weeks ago no problems .Rechecked
fly wheel nut torque yesterday it was right on.
THESE BIKES ARE GREAT
Posted February 12, 2003 - 04:48 PM
Posted February 12, 2003 - 04:54 PM
I was just searching for that post. You are exactly right about fixing it. Just do it yourself and stop the worry.
What was the heading of the post?
Posted February 12, 2003 - 04:58 PM
I think you are right on. The match up of the taper of the crank and fly wheel must be off a little. When I poped the flywheel off my WR400 there was a very loud pop, that think was on there. The tapers have an enormous amount of hold. The 47 lb vs 61 lbs of tork shouldn't matter if the tapers match up. For the bike to backfire and shear the key just doesn't make sence to me. I bet the pitch of the tapers are off by a bit.
Posted February 12, 2003 - 05:05 PM
thumper talk rules.
Posted February 12, 2003 - 06:26 PM
Posted February 13, 2003 - 05:14 AM
Posted February 13, 2003 - 07:38 AM
Has anyone taken these apart and measured the taper angle on the shaft and the inside of the flywheel? If they are not the same angle, you are not getting the full contact strength of the taper fit.
I know someone mentioned using Dykem layout fluid but I haven't seen anyone report whether or not this was used.
Posted February 17, 2003 - 05:39 AM
Posted February 17, 2003 - 07:00 AM