Home
Basic Dirt Bike How-To's - Video
Dirt Bike How-To's - Video
Living The Moto Life - Video
Bike Tests | Shoot-Outs - Video
Forums
What's new
Latest activity
Log-In
Join
What's new
Menu
Log-In
Join
Navigation
Install the app
Install
More options
Close Menu
Forums
Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
WR250F goes "Boom!"
Reply to thread
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Message
[QUOTE="Humai, post: 165057, member: 17287"] [b]Crank Failure Update[/b] As I wait for the new main bearings to arrive from Japan, I spoke yesterday to the local Yamaha Motor Company tech rep about this problem. In our country (pop. 3.5 million), four WR250Fs have had crankpin fractures like mine. Extrapolated to US proportions, that suggests something in the order of 300 WRs failing in the US, if bike population and people population are proportional (which they probably aren't, but I digress . . .). Interestingly, no crankpin failures have occurred on YZ250Fs in this country. I understand that this may be at variance to what is happening in the US and other countries, based on one or two reports of YZ250F crank failures on various message boards. The four WRs have all failed relatively early in their lives - my 600 mile failure is typical. This suggests that higher mileage bikes that have survived a good thrashing are probably not going to fail. This WR-but-not-YZ crank failure phenomenon has got the technicians looking at things like crank harmonic vibration and the effect of the much heavier WR flywheel on crank reliability. Suffice to say that, according to the tech rep, the technical guys are still working on the problem. Yamaha has accepted full responsibility and will cover WR crankpin fractures for as long as it takes, according to Yamaha. I have been impressed with their response to this problem so far. [/QUOTE]
Verification
Which ocean is California closest to?
Post reply
Forums
Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
WR250F goes "Boom!"
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top
Bottom