On Tuesday, January 25, 2011 10:03:38 am andy pugh did opine:
> On 25 January 2011 10:16, Mark Wendt <mark.we...@nrl.navy.mil> wrote:
> > Great Scott! �What did you do to that poor thing? �;-)
>
> I am not sure. All I noticed was that the battery wasn't charging. No
> idea how long I rode it with an engine full of bits of magnets.
>
> My best guess is that the problem was caused by the starter motor,
> which had lost a commutator segment and which gears to the back of the
> magnet drum.
>
> Yamaha had no ideas at all.
>
> The bike it still running well 15,000 miles later (total 75,000 miles,
> which is quite a lot for a Yamaha R1 :-)
My SWAG is that the sealing coating on the magnets failed, which if exposed
to the elements, will self destruct by the sintering falling apart.
Perhaps some component of modern high detergent motor oil might damage the
surface coating, with nominally a 60,000 hot miles timetable?
I suspect Yamaha _does_ know what happened but won't allow as how they do
else they might be faced with recalling them all at x miles to replace it.
Most rice grinders don't get to 50k miles. There is always the exception
to the rule though, I had a Honda 350F that had 57k on it, running well but
leaking oil (they all did, the head gaskets leaked near the OHC chain from
day one), at 57k miles. I had put 33k of them on it in 19 months when I
swung my leg off it the last time & handed the key & title to the next
owner. Used it for a chair car in the northern CA high Sierra's in the
81-82 time frame. As the license plate said, my other car is a 28' Pace
Arrow. It got about 2.1 mpg. :(
That R1 was a sweet looking and running bike, I would like to have one
myself if I were still riding. I sold my last bike about 12 years ago when
I realized my reflexes were slowing and that if I kept riding the way I
liked to, I _was_ gonna kill myself.
--
Cheers, Gene
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
There is a secret person undamaged within every individual.
-- Paul Shepard
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