Well, I don't know.

[Van]

I'm rebuilding thr forks of my GS1100GKZ and I'v ran into somthing I don't know about. It was bought used or abused, and it does not have the air balance tube. The 82 modle is suposed to have. The forks look good and fit good. I supose some one has traded them out with some from another bike or at least the part that the air fill valve is in. How can I tell if I have the right lenth tube to order 1107 progerssive springs?
Van

[TheCafeKid]

I thought the GKs had 39mm forks??? I know the trees are different because of the fairing??

[lucabond]

I have 31-7/8 top to bottom on mine full extended with progressive springs in them not sure which would have to find the slip . I don't have the air tube (didn't know I need 1) and I'm pretty sure my arn't stock either. I think my bike was crashed at 1 time. My axle is inline not offset either leading or trailing. Hope this helps, good luck.

[Marine36]

My Clymer manual says only the 1983 1100 G had the air balance tube. Do you have air valves at the top of the fork tubes?. I think Josh is correct that the GK tubes were 39MM.

According to Progressive Suspension the part number for 82GK is 11-1129

http://www.progressivesuspension.com/productsearch.aspx

[Van]

Well, I don't know.

I have an air valve on the left fork, but not on the right.
Van

[chef1366]

If you get the Progressives you won't need to run air anyway.