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Old 11-07-2011, 07:32 PM   #1
Muddy3 OP
Muddy
 
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Joined: Mar 2005
Location: Estes Park
Oddometer: 38
K75S to K75GS

Truth is I'm much better at window shopping Toxic Britney in Jo Momma than I'll ever be at writing a Build Thread. So just one ground rule - Keep your expectations low and I'll try to over-deliver.

Here is where the problem started...I saw this picture.



Then this one.



I knew a little about these, having owned a K75C back in the early 90's. I remembered it as smooth and pain free to own. For this project I found a one owner, well maintained 1992 K75S with 26,000 miles, less than an hour from my house. Just $3300 later, I had myself a project.

Don't expect a lot of "before pictures". BMW made 10's of thousands of these things...we all know what they looked like. Besides, I hate having evidence of failed ideas around for my wife to use as evidence.

The Build:

The rear wheel was the crux of the project. From what I could gather, most of these conversions used either a R100GS drive shaft w/drum brake or started with the C model w/drum brake. I wanted to keep the disk brake and go with a spoked wheel. Clearance between the caliper and spokes was the issue. Lucky for me Zach at Woody's Wheel Works solved the issue with a different model caliper and rotor. I'm currently using the rear Progressive shock that came on the bike with the upper mount repositioned down to raise the rear of the bike.

Front end is a 45mm Marzocchi Shiver and triples off a GasGas FSE450...FleaBay find. A 1" spacer below the top triple and this thing bolt right on...sort of. Baja Designs dual 8" lights that were sitting around the garage and a new Pro Taper bar finished off the front end.

Exhaust- Kept the 3 into 1 and had Collins Muffler in Loveland bend up a pipe to connect the silencer. The silencer is a Delkevic oval shortened 4".

Center stand - lengthened 2 inches to deal with the longer suspension.

The Ride - My experience is limited to 100 miles so far with about 20 of that gravel and/or easy fire roads. Got to say I'm pretty amazed to this point. It's no 950SE but it has no trouble getting out of it's own way. Still some sorting to do with the suspension but we're not too far off. Needs a skid plate and maybe some engine crash guards.

As projects go this was a 4 on the 1-10 difficulty scale...so far.

A few photos.







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