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The effect of long-term vibration

Grimly

Grimly

Forum Sage
Super Site Supporter
Past Site Supporter
on pillion footpeg securing pins...
From this...
guSkYf8.jpg


To this...

UOVIom8.jpg
 
Not really. The camera picks up and emphasises a lot that looks a lot worse than it is.
The main issue was vibration over many miles. As far as I know, this is the first time the pins
have been replaced. 240,000 miles on.
 
You're 79' 850G has 240'000 miles on it??? if so I'd very much like to hear it's life story. And if that mileage is true, how many valve shim adjustments did it have in that time?
 
No, the '79 has a mere 140K on it, being a standby bike when I bought the '80. Both bikes are guesstimated mileages, as for a cumulative period of months, each had a broken speedo cable. Cables didn't last long in daily use at high speed.
I was (iirc) the third owner of the '79, it came to me in about 1989 with ~25K on it and I got it cheap, because back then, any bike with more than 10K on it was regarded as high mileage (hahahahah).
The '80 came my way a couple of years later, already with well over 150K up, having been used as a courier bike for a while. I made that my No1 bike, it being better sorted and having better brakes. The '79 was starting to show a lot of wear and tear by then, and was in need of a re-build, quite honestly.
So, I put well over 100K on the GN, and ~80K on the GT.
These bikes weren't all that unusual at the time, nor since, as there were and are lots of mid to large capacity courier machines turning in huge mileages each year - the Yamaha XJ900 is one that immediately springs to mind. I know of one that, at last sighting, had been around the clock at least 3 times, still on the original engine, but that had been apart in the hands of a PO to replace an alternator chain, so all gaskets and seals were renewed and it was re-ringed at the time, just in case.
Big Japanese fours just keep going and going if you change the oil every couple of K and don't thrash the nuts off them all day long.
 
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