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Gearbox sprocket

What started as a quick oil seal change turned into something more major but Ive seen kickstarts, sprockets and gear levers welded to their shafts but this takes the biscuit!

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Apart from being worn out, as long as it's been competently done don't see a problem? The engine sprocket on my ES2 has been welded at some time in the past and it seems OK.....

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The whole sprocket ring was welded on to the splines and it isn't aligned properly,you can see by the side wear, let alone the weld quality, but whatâs the point when sprockets are and have been available!

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Hi Dan,

From memory this sprocket should be held on with a big left hand thread nut. Are the threads damaged as well.

Patrick

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I've seen worse.....

These bikes were just cheap transport for most of their lives and were often worth less than a proper repair would cost. That one does seem to have lasted long enough to hook the sprockets....

I'm not suggesting it should be done now but understandable in the past to keep on the road.

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Previously ian_soady wrote:

I've seen worse.....

These bikes were just cheap transport for most of their lives and were often worth less than a proper repair would cost. That one does seem to have lasted long enough to hook the sprockets....

I'm not suggesting it should be done now but understandable in the past to keep on the road.

If the teeth are off centre and you put it back on the other way it may line up and you can use the un-warn side of the teeth, lots of life in it yet. (just joking)

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Andy tells me that gearbox sprockets were like hens teeth a few years ago so I guess that was the only way to keep it running, so I forgive the po, but he could have done a better job welding it!

Patrick the mainshaft threads and nut are good .... fortunately! Iâm doing the chaincase seal and drive side crank seal while Iâm in there.

Cheers dan

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That's good news then, Dan. I've changed the oil seal a couple of times but don't recall much about it which probably means it is pretty much a screw off/screw on job but as Uli will probably vouch for nothing is ever a simple screw off/screw on job on a Jubilee/Navigator !!!. Mr Honda probably keeps one in a glass display case in his office just to remind himself how superior Japanese technology ( C50 ) was. How do you say Vorsprung durch Technik in Japanese ??.

Yes Jubilees were worth nothing or a bit less back in the seventies/ eighties and not much more now. But we still love them - they are better than the average jigsaw puzzle (with a few bits missing).

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The biggest challenge was getting the new seal in, the original was encased in metal, the new one is rubber and the edge of the casing is sharp, ideally it needs easing but I didnât want Aluminium filings in the mainshaft bearing!

Oh and I had to drill one of the chain case screws which even an impact driver couldnât shift, that needs a nut welding on the remaining stub.

so yes, nothing is quite straightforward !!

 



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