Kickstart Shaft Seal Tutorial

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I don't recall what seal I used when I rebuilt the gearbox on my 750. I think I just used an O-ring. https://www.accessnorton.com/NortonCommando/gearbox-teardown-with-plenty-of-pictures.5107/post-53593

The 850 is definitely leaking and it's got an O-ring. I picked up some SKF 9815 (actually not SKF but same size and should be equal quality) seals. Since I have the cover off this is a good time to address is. Although it should be an easy process I may still make a video tutorial.

Given the availability of these seals why would anyone machine the cover for a different sized seal? You can readily order them from Amazon or eBay all day long. I happened to buy them locally because I was hoping to button up the gearbox today.

I'm not going to bother with the shifter shaft. There's no evidence of gearbox oil even getting close to that area.
 
I've used the skf seal and had it work really well on one bike, but on another I had one fail. I replaced it with the Andovour quad ring seal and it seems to be working. I've also used the quad ring on another bike and it is dry so far. Be sure and use some fine emery paper and polish the shaft. Also, lube the seal with some grease. One nice thing about the quad ring is you don't have to remove the seal retainer to install it.
 
Has anyone had issues getting the kickstart retainer not want to come out? I tried a heat gun first. Now it’s in the oven and it’s not budging. Even tried a little ice to cool it off. Nothing. My adventures is a kickstarter seal replacement are quickly coming to a screeching halt.

So far the tutorial is what not to do. :confused:
 
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Kickstart Shaft Seal Tutorial

At least I have the seals.
 
Has anyone had issues getting the kickstart retainer not want to come out? I tried a heat gun first. Now it’s in the oven and it’s not budging. Even tried a little ice to cool it off. Nothing. My adventures is a kickstarter seal replacement are quickly coming to a screeching halt.

So far the tutorial is what not to do. :confused:
Did you take the kickstart shaft bush out? Once that is out the seal should come right out. I used a heat gun and the bush dropped out fine.
 
Did you take the kickstart shaft bush out? Once that is out the seal should come right out. I used a heat gun and the bush dropped out fine.

Bush (or retainer as I was calling it) will not budge, first I tried a heat gun and then broke out the oven. Nothing.
 
A punch from the other side, perhaps - though that might damage the bush.
FWIW, X-rings work for me. Removing the outer cover is a 15 minute task that I'm willing to do every 5 years or so.
And yes, oil can get to the shifter shaft too.
 
Might require a specific order of cuss words before the bushing loosens up. Trial and error.

If all else fails, you could MacGyver a tool using threaded rod or a bolt, nuts, washers, and a metal tube or socket the right diameter that pushes, or pulls it out.
 
A punch from the other side, perhaps - though that might damage the bush.
FWIW, X-rings work for me. Removing the outer cover is a 15 minute task that I'm willing to do every 5 years or so.
And yes, oil can get to the shifter shaft too.

I have a brass punch.
 
Never needed to. But I'll ask this - if you do get it out how will you get it back in without melting the seal?
 
Never needed to. But I'll ask this - if you do get it out how will you get it back in without melting the seal?

Oil seals should typically be able to withstand oil temps, correct? How hot does the oil get?
 
Won't you need to use an oven again to get the bushing back in?

You're only suppose to get the parts to 250˚F max to get the bush back in, oil gets hotter than that. So no, I'm not worried. Seals are meant to operate up to 250˚F or more, depending on the material.
 
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