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Front forks

  • Thread starter Thread starter bmac
  • Start date Start date
B

bmac

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Replaced my front fork seals on my 82 gk2 and found that they differ from my 82 850. I could not understand why I couldn't remove the inner tube with a 19 mm nut and rod attached. Upon removal of the tube with a speared piece of oak to stabilize the inner tube, I seen that the inner part to secure to, is equal to a 15/16 's nut. So, this is just FYI. All little heads up! Bob
 
bmac said:
Replaced my front fork seals on my 82 gk2 and found that they differ from my 82 850. I could not understand why I couldn't remove the inner tube with a 19 mm nut and rod attached. Upon removal of the tube with a speared piece of oak to stabilize the inner tube, I seen that the inner part to secure to, is equal to a 15/16 's nut. So, this is just FYI. All little heads up! Bob
Click to expand...

Good to know! I encountered this problem as well, and wondered what size hex was actually in there. Sounds like 24mm. (15/16" = 23.8mm, so close enough).

We had to extract and replace the seals without removing the tubes. Very touchy business. :eek:

The mighty GK has 41mm fork tubes, while the other shafties make do with 37mm.
 
17mm outer - 14mm inner

17mm outer - 14mm inner

I bebuilt (read fought) my GKs forks this winter and learned that a 17mm nut will fit the outer "star" on the damping rod and a 14mm nut will fit the inner one. The metric threaded rod was the expensive part.....
 
There must be variations out there? The metric nut I used fit a 15/16 open end wrench. A 22 metric wrench, largest my set goes to, was still small, but not by much. In any event, just a heads up for someone tackling front fork seals on a gk2. Difference between a gk and a gk2? I don't know. I can't see that being different. Bob
 
14mm nut measures 22mm diameter

14mm nut measures 22mm diameter

I measured the nut I used, to put in the damping rod on the GK, and found it measured 22mm "outside" diameter. I was sure I had bought 14mm nuts so I looked it up (gotta love the Internet for getting info like this)

http://www.boltdepot.com/fastener-information/Nuts-Washers/Metric-Nut-Dimensions.aspx

And what do I find? A 14mm nut measures 22mm across the flats!!
So why are they called 14mm then???? I guess because a nylock nut height is 14mm?

Who comes up with this stuff?
 
Last edited:
d_hoffman said:
I measured the nut I used, to put in the damping rod on the GK, and found it measured 22mm "outside" diameter. I was sure I had bought 14mm nuts so I looked it up (gotta love the Internet for getting info like this)

http://www.boltdepot.com/fastener-information/Nuts-Washers/Metric-Nut-Dimensions.aspx

And what do I find? A 14mm nut measures 22mm across the flats!!
So why are they called 14mm then???? I guess because a nylock nut height is 14mm?

Who comes up with this stuff?
Click to expand...

I think you will find that "nut" size is the thread size.
 
Ah - didn't know that. Makes sense though because that's the only thing that would be consistent between different kinds/applications of the same nuts.

Still learning something every day
 
Very good to know. I will keep that in mind. 14 does ring a bell though when I bought the nut and rod. I really wasn't paying attention to the sales person, I just needed a nut to fit. I got standard coarse threaded rod and brazed the nut to the rod. Bob
 
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