Preliminary data on woodruff key failures
Posted April 16, 2003 - 05:22 PM
Here is the skinney
Production (serial numbers)
From 1091 to 1766 = 100% of the failures in the study group. No failures were reported from 0-1090 or from 1777 or above. The 1766 appears to be a spike in the data. The next highest failure was at 1321.
From 1091 to 1286 = 77.7%
I also noted after reviewing the posts on the bikes that have not failed that the 1000 and above were the first ones delivered to the dealers. Those who received the second shipment of bikes were more like to receive one from 0-1000. With the limited data received, the failure is somewhat related to production number.
Miles to Failure
Of the reported data, 0-130 miles = 100% of the failures. 0-50 miles=55.6% of the failures and 51-100 miles =44.4% of the failures. Based on the limited data, it appears the more miles on your bike, the less likely you will have a failure.
Thanks to all that responded to the post with the information.
Posted February 19, 2003 - 06:01 PM
Posted February 19, 2003 - 06:02 PM
Posted February 19, 2003 - 06:17 PM
From 1091 to 1766 = 100% of the failures in the study group. No failures were reported from 0-1090 or from 1777 or above." [/list] It is interesting that the first batch shipped started with the 1000+ serial numbers, and all failures occured in that batch. Perhaps Yamaha knows they had a production problem, and fixed it before the second batch? This is great work. :)Please continue. Hopefully you will be able to give this data to Yamaha, and get feedback as to what they are doing, if anything, with it..... For those unfortunate to have a serial number in the 1091 to 1766 run, you can expect to have problems... Call your dealer.
Posted February 19, 2003 - 06:33 PM
03 WR450FR-picked up 2/3/03. Works connection alum. frame guards.
Posted February 20, 2003 - 01:56 AM
Posted February 23, 2003 - 11:39 AM
Posted February 24, 2003 - 07:31 PM
Posted February 24, 2003 - 08:22 PM
Posted February 25, 2003 - 05:43 AM
And just another thought, wait til people start removing the neutral switch and the clutch lever switch, and start using the E button IN gear. That small key doesn't have a chance if the flywheel torque is low.
Posted February 25, 2003 - 07:21 AM
Like I've said before, I don't want to replace the crank because of a botched "Over the phone Fix".
Posted February 25, 2003 - 04:30 PM
Posted February 25, 2003 - 04:49 PM
Posted February 25, 2003 - 07:38 PM
Just a note to report that my #0996 WR450 just sheared the key after 54 miles (second ride).
If the dealer balks at doing the repairs, how do I hold the rotor while re-torqueing the nut after I get a new key ?? Its been 45 days since receipt of my bike, so I suspect the dealer will whine.
Posted February 25, 2003 - 09:31 PM
Posted February 26, 2003 - 02:14 AM
When you pull the cover you will see the answer to your question, there is a built in hex on the rotor that uses a 15/16 wrench. It's shown in the manual pages 4-78 and 4-81 you should lap the rotor in just takes minutes.