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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => Project Custom Motobricks => Topic started by: zroadhouse on June 04, 2016, 12:25:05 PM

Title: '85 K100RT Build - "TT" Endurance Racer
Post by: zroadhouse on June 04, 2016, 12:25:05 PM
Hello all!

This is the start of my K100 "TT" build thread on the Motobrick forum. :)

Austin has been the host to two great events for the past several years: MotoGP at Circuit of the Americas and the Handbuilt show. After going to this year's show, I felt inspired to build a bike. In the past I've dabbled with cafe-racering my old Street Triple and built a race bike out of my Daytona 675R. For this project I wanted to start with something older, simpler, and less expensive. A bike that I could tear down, put back together, and modify to my hearts content. I thought about R-bikes and old Hondas, but they are getting harder to come by unmodified and/or for a reasonable price.

A little over a month ago, I found a 1985 K100RT with 77k miles for a very reasonable price to use a the basis of my build. This bike had obviously been dropped on the right side, was missing some fairing pieces, no radio, etc. -- perfect for my purposes. I handed over the cash, and rode it home in a light rain, fairings shaking all the way home. I believe I'm the 5th owner (the 4th bought it to fix and flip it).

Title: Re: '85 K100RT Build - "TT" Endurance Racer
Post by: zroadhouse on June 04, 2016, 12:44:00 PM
Here's the progress on the tear down so far. At this point, everything is disconnected and ready for me to remove the frame. Before I do that, I'm going to test fit the fairings that are arriving today. :clap:
Title: Re: '85 K100RT Build - "TT" Endurance Racer
Post by: zroadhouse on June 04, 2016, 01:22:28 PM
There have been a few small issues along the way.

Title: Re: '85 K100RT Build - "TT" Endurance Racer
Post by: The Dude on June 04, 2016, 04:26:53 PM
"Rear disc was thinner than .14" and was cracked. Rear pads completely worn down."

Thanks for reminding me to have a good look at mine....
Title: Re: '85 K100RT Build - "TT" Endurance Racer
Post by: TimTyler on June 04, 2016, 06:32:15 PM
Might as well take off the front master cylinder and brake lines, and reinstall with new lines when you put everything back together.
Title: Re: '85 K100RT Build - "TT" Endurance Racer
Post by: zroadhouse on June 04, 2016, 06:49:38 PM
Might as well take off the front master cylinder and brake lines, and reinstall with new lines when you put everything back together.

I'm planning on it. Hadn't gotten around to it quite yet. I'll definitely need new lines as I'm planning to have a fairing stay come up and out of the triple tree nut where the current brake line is. Weird that they routed it that way. Is that common on BMWs?
Title: Re: '85 K100RT Build - "TT" Endurance Racer
Post by: zroadhouse on June 07, 2016, 07:27:24 PM
The frame is off. :)

Title: Re: '85 K100RT Build - "TT" Endurance Racer
Post by: zroadhouse on June 07, 2016, 07:29:22 PM
And the fairings are in... :)

Title: Re: '85 K100RT Build - "TT" Endurance Racer
Post by: jjs1234 on June 07, 2016, 07:41:05 PM
ooh! Mind if I ask where the front came from?
Title: Re: '85 K100RT Build - "TT" Endurance Racer
Post by: zroadhouse on June 07, 2016, 07:48:33 PM
Fairings and headlight are from Airtech Streamlining - F1F (XR69) + MORI2 tail + some handcuffs.
Title: Re: '85 K100RT Build - "TT" Endurance Racer
Post by: jjs1234 on June 07, 2016, 07:59:22 PM
So your planning to mod it? I didnt see a k100/1100 fairing on there. But it looks fierce!!
Title: Re: '85 K100RT Build - "TT" Endurance Racer
Post by: zroadhouse on June 07, 2016, 09:15:49 PM
Yes. This is a mod build. I'll be making fairing brackets, stay, etc. I picked this fairing based on style and size.


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Title: Re: '85 K100RT Build - "TT" Endurance Racer
Post by: Elipten on June 07, 2016, 10:55:05 PM
Now this is looking interesting and has my attention.