Crankshaft Bearing jammed
Posted August 28, 2003 - 01:02 PM
I've been a great reader of all your posts here in the forum. I never had to post anything since now. I used to own a 2003 WRF450 that I put onto road in the summer.
A few weeks ago, me and friend went to the New Brunswick, in Canada, we are from Québec. During the journey, my bike start to do some clacking noise like when your valves need to be adjusted. The sound was going worse and it became really unpleasant. Monday morning, we decide to take my bike to the nearest dealer, in Moncton. There was 3 km left qhen the engine staled. Enough gaz, enough of all, the engine was dead.
So here we are, the dealer take a look and tell me that no wrf450,426,250 crank bearing would be enought strong to support my type of riding, street use. By the way, I had put two more teeth on the counter shaft sproket. He told me that he's rebuilding many of this wrf crankshaft & bearing because people are riding their bike at constant speed for long time, even on the long rocky montain trails. I new that this motor was not specialy designed for that type of road and that's why a was never running at constant speed, releasing the gaz and turning it often. I'm really not rough on the mecanic.
I was really surprised that nobody else on this forum as already got this problem on his bike also. Maybe I never saw the post he had writen too.
Finally, I let my bike to the dealer with its bill of about US$900 and shop for another. That's where I found my new 0KM KTM SM '02 that was much cheaper than my WRF450 with all the stuff on it, US$5000. I had look for ktm before buying my exYamaha, but it was way more expensive. I should have met this ktm dealer in Moncton before!
So this was my first story and maybe the last on this forum unfortunatly.
Thanks guys for your posts!
Posted August 28, 2003 - 01:24 PM
What da hell is zat?
Posted August 28, 2003 - 01:26 PM
I dualsported my '02 YZF 426 about 3000km ago and I haven't stopped since. I rarely hold a particular speed for long and the max I'll run the bike w/my 14/47 gearing is about 70kph.
I too have been thinking about getting a big KTM for increased engine reliability. That said, the thought of less 'flickability' doesn't intrigue me all that much. Maybe I'll test-ride a Katoom first.
Posted August 28, 2003 - 01:41 PM
I unfortunatly had a bad experience with my wrf450 which I now know it's not build for my type of riding. What's getting me mad is that my ex dealer and other one told me I will never had problem with it even if I'm doing long ride.
The wr450f is an awsome bike and it has a lot of power. I would keep it without any doubt if I was not doing so much road.
By the way, I forget to mention that it broke at nearly 4000km, about 1200km after the last check up.
Posted August 28, 2003 - 02:54 PM
Posted August 28, 2003 - 03:22 PM
Posted August 29, 2003 - 08:54 AM
I think you hit the nail right on the head....
Posted August 29, 2003 - 09:24 AM
Posted August 29, 2003 - 09:46 AM
I have another theory:
1.2 qts of oil, and we know at sustained high speed (highway) riding, the WR is gonna blow tons of oil out the breather. Ergo, instant seized motor.
I never liked the idea of a 1.2 qt dirt bike that blows out the breather. All for what, to save 1lb?
Just my 2 cents
Posted August 29, 2003 - 09:57 AM
Posted August 30, 2003 - 03:46 PM
cycle canada recently had an article on converting a wr450 for motard use and also noticed oil venting from the crankcase during a high speed track sesion . if wr's were designed to be ridden on the street they would come with turn signals from the factory .
Posted August 31, 2003 - 06:59 PM
Now how come Yamaha USA can't sell the same bike here at home??? I'd of picked it up without blinking an eye.
I remember seeing a WR250 two stroke that is also street legal down under, and I can understand that 'cause it's a 2 smoke.
Nothing against my WR's but, I'd of loved the opportunity to purchase a street legal CRE250 or a WR250.
Posted September 02, 2003 - 05:43 AM
During my trip, I often looked at the oil level because I'm aware that there is not too much of oil for that kind of motor. I had also plane to change my oil half way just to be sure of its quality, doesn't cost so much to get my mind free...