Front OEM shock spring specs for '79 GS850G

[sarathchandars]

For my ever ongoing rebuild of my GS850G, I'm looking to get the front fork sorted with progressive springs. However, I don't know the OEM spring specs. I'm getting a good deal on Progressive Suspension PS1145 but not sure if it will work for the '79 GS850G forks. Can anyone help?

[bwringer]

Looking at an application list, I'm pretty sure those Progressive springs (if you have a set of 11-1145 springs) are intended for much larger forks with a 41mm outside diameter (for example, they fit most years of the SV650). Your bike's forks have a 37mm OD, so they'll need much skinnier springs to fit inside.

After some assorted poking around in dark corners, I turned up this Progressive part number for Progressive fork springs for all years of the the 850G/GL. 1000G/GL, and 1100G/GL: 11-1129

It appears to be in stock here:

https://www.jpcycles.com/product/progressive-front-fork-springs-honda-kawasaki-suzuki-yamaha-bmw-ducati-1976-2009?sku_id=903064

If you are large and/or ride fast (guilty on both counts), you'll want straight-rate springs. Race Tech and some other suppliers have these. The Progressive brand springs are a good all-around choice for the more average-ish rider.

[sarathchandars]

Thanks bwringer. Fortunately, I'm not guilty on both counts So I guess I shouldn't get too excited about the great deal that turned up for the what would be useless set of springs.