Preliminary data on woodruff key failures
Posted May 28, 2003 - 08:24 PM
Posted June 02, 2003 - 01:02 AM
Interestingly enough all Yamaha dealers, worldwide, are receiving a bottle of Loctite 648 direct from the Yamaha factory in Japan for the mods. I saw their bottle, label is in Janapese showing its origin.
Had my first ride on Saterday, great enduro bike, love the chassis and suspension, power is not as crisp as the CRF but very good lugging bottom end. Perfect for the offroad application.
Only did 87km, but so far am very happy with my choice.
BTW, fitted a FMF Powercore 4, man this pipe is loud, wishing I had gone for an Akropovic or something.
Posted June 02, 2003 - 10:27 AM
Posted June 14, 2003 - 09:02 AM
Posted June 17, 2003 - 09:53 AM
Posted June 17, 2003 - 01:41 PM
Posted June 18, 2003 - 01:01 PM
Sold a Husky 610 (also will bleed blue)
Posted June 24, 2003 - 02:26 PM
Posted June 24, 2003 - 05:25 PM
From all the info that I have gathered from this site and other means, it really does sound like there was a problem at the factory with a run of bikes. Maybe, and I think should have been caught at the QA/QC dept. They didn't have the flywheel nut tight as called out by the spec. Maybe it was a calibration issue with the equipment no one will say. But once the problem showed it ugly face Yamaha was somewhat forced to do something. Since they most likely don't know exacly what bikes have the issue they put forward a recall/fix for all the WR450s. I think the only real way you are going to know if your dealer first, did the fix and second did it correct is ask them face to face and then see if the dealership sent the paper work back to Yamaha. If they did the right thing I think you are good to go so get your truck down there and get that bike! You know you what it.............
Posted June 24, 2003 - 07:09 PM
Posted June 25, 2003 - 07:58 AM
Posted June 27, 2003 - 12:05 PM
Posted June 28, 2003 - 12:36 AM
Posted June 29, 2003 - 10:15 AM
Ordered my bike before reading of woodruff key problems on this forum. Caught up on the info before taking receipt of machine on june 21st. Enquired about the problems with the dealer - he assured me the problem was only with an early batch of bikes and the only rectification he knew for was the checking of the torque on the flywheel nut.
Not completely convinced by his optimism I decided to follow the manual guidelines on break-in and check the nut as specified after initial running in. No need for a crystal ball to know what's coming next.
Stalled the bike after 11km on clock and it would not restart. Towed bike home investigated problem and found flywheel nut slack and key sheared. Not willing to wait (the shop I bought the bike from is 200 mile away) I manufactured a new key and following the Yam tsb refitted everything back together. I've only pottered about locally since the'fix' with no problems as yet, fingers crossed.
I've noted all theories and concur that
1 the key is for alignment not to transmit torque
2 If mis matched tapers between shaft and flywheel contributes to the load being thrown on key, shearing of key would result.
3 Yamaha don't appear certain as to the cause of the problem Re. belt and braces approach with Lap, loctite and Torque.
As this is the first new bike I've had that has let me down so soon and cost £5495 (approx $8000 -we get stiffed by the taxman good, here in the UK) I feel really sad that more information hasn't been forthcoming from the manufacturer and if it wasn't for this forum I would have thought that my problem was an isolated incident. Anyway the 23km that I have ridden fault free have been superb.
Posted June 30, 2003 - 07:54 AM
Posted June 30, 2003 - 08:59 AM
Posted June 30, 2003 - 10:02 AM
Posted July 01, 2003 - 03:50 PM
I should clarify that the bike odo. actually says 1.1 miles...so it's not really 0 miles but I'm still surprised.