13" or 14" Progressive 12 series

[Kanon08]

Hey all, this is my first post and consequently a first Thread as well.

I'm in the midst of Restoring/Slightly Modding a 78 GS750. My intentions for the bike will be a time period correct racebike while trying not to lose much of the original feel of the thing.

My question is do any of you know what length some of those old racebikes were running in the rear and or have photos of a build using 13" or 14" 12 series progressive rear shocks?

Any help will be much appreciated; thanks.

[mrbill5491]

I'm installing the 14" 12 series on my 750, they are the stock length though the springs are rated at 105/175 I believe or 15% firmer then stock ones. As for the length on the old race bikes haven't a clue.

Hey all, this is my first post and consequently a first Thread as well.

I'm in the midst of Restoring/Slightly Modding a 78 GS750. My intentions for the bike will be a time period correct racebike while trying not to lose much of the original feel of the thing.

My question is do any of you know what length some of those old racebikes were running in the rear and or have photos of a build using 13" or 14" 12 series progressive rear shocks?

Any help will be much appreciated; thanks.

[Kanon08]

Hum, I swear when I measured the length of the shocks I have, which appear to be stock, were a 11 something from the Clevis to Eye. In hind sight maybe thats due to the fact they were still bolted up to the bike..... Anyway it appears I'll probably just roll with the 14's thanks for the advice.

[rwcfrank]

The photos can be misleading because they shock mounts have been moved alot back in the day. If you look at Cooleys 1000 they moved both upper and lower mounts forward. Its more about the angle of the swingarm and spring rates than anything else.

[BassCliff]

Greetings and Salutations!!

Hi Mr. Kanon08,

I do believe the stock length for the GS750 is 13.25 inches. Please check your manual to be sure. Progressive says 13 inches.

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