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Author Topic: 1991 K100RS Rescue  (Read 19226 times)

Offline euromog

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1991 K100RS Rescue
« on: August 08, 2014, 11:16:21 AM »
Hi everyone, New to the site and just bought a K100RS for $500. It has no brakes, two flat tires, dead battery and a small leak on the gas tank that was patched with JB weld. Gas tank has been empty for a long time but the engine oil looks like new. :) It has been sitting outside with a tarp over it for over 5 years. Has 45K miles on it and plan is to getting it running, rebuild the brakes, then little by little work on the cosmetics. This is going to take a while.
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Offline euromog

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Re: 1991 K100RS Rescue
« Reply #1 on: August 09, 2014, 07:08:23 PM »
Removed the tank and filler neck to inspect. Rust and corrosion on the fuel pump and gas guage sending unit. Removed the JB weld from the tank and found a nice hole caused by corrosion. Isn't alcohol in gas great?
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Offline johnny

  • TrailBrakingThrottleWhacker
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Re: 1991 K100RS Rescue
« Reply #2 on: August 09, 2014, 07:15:01 PM »
greetings euromog...

welcome to motobrick.com...

keep this project going... its gonna be expensive...butts its gonna be yeeeeehaaaaaa...

j o
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  • :johnny i parks my 96 eleven hundert rs motobrick in dodge county cheezconsin  :johnny

Offline TimTyler

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Re: 1991 K100RS Rescue
« Reply #3 on: August 09, 2014, 07:24:28 PM »
If it were mine I'd part it out on ebay and buy a bike in better shape with the $$.
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Offline euromog

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Re: 1991 K100RS Rescue
« Reply #4 on: August 09, 2014, 07:44:00 PM »
Now for the good. Borrowed a battery from a Honda ATV. Pulled my Vanagon into the garage next to the K100. Ran a fuel line from the fuel pump on the Vanagon to the fuel rail on the K100. Ran a return line from the K100 back to the gas filler pipe on the Vanagon. Jumpered the fuel pump relay and now have fuel delivery for the K100. Had to crank it a few times but it started up and idled. Engine sounds tight, no bubbles in the coolant. I have not even removed the spark plugs yet and the gas in the Vanagon is a year and a half old. With new plugs, have the injectors cleaned and fresh gas it will run great I think.

https://www.youtube.com/watch?v=tT_OGQPYT0E&feature=youtu.be
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Offline euromog

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Re: 1991 K100RS Rescue
« Reply #5 on: August 09, 2014, 07:45:01 PM »
Quote from: TimTyler on August 09, 2014, 07:24:28 PM
If it were mine I'd part it out on ebay and buy a bike in better shape with the $$.


What fun would that be? :)
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Offline TimTyler

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Re: 1991 K100RS Rescue
« Reply #6 on: August 09, 2014, 10:42:25 PM »
It's going to be a pain finding a driver to follow you in the Vanagon every time you want to go for a ride.  :hehehe
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Offline F14CRAZY

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Re: 1991 K100RS Rescue
« Reply #7 on: August 10, 2014, 12:08:12 AM »
Park the bike in the Vanagon
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  • Grand Rapids, MI
  • '87 K75C
'87 K75C w/ Pichler V1 fairing. LED's, CATZ driving lights, Audiovox cruise, LT top case, tons of other mods by Drake...

Offline rbm

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Re: 1991 K100RS Rescue
« Reply #8 on: August 10, 2014, 12:09:03 AM »
Longer hoses needed.
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  • Regards, Robert
Toronto, Ontario

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Offline pdg

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Re: 1991 K100RS Rescue
« Reply #9 on: August 10, 2014, 03:53:09 AM »
Nobody has any sense of adventure... Parts are cheap, rebuilding is fun - if everyone broke up every rescuable k because of minor issues like these there'd only be 6 left...
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1988 K75S

Offline Bokobob

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  • I am a 1936 Model
Re: 1991 K100RS Rescue
« Reply #10 on: August 10, 2014, 06:26:50 AM »
Looks to me that you are already making great progress..... :clap:
I am in awe of your ability to get the fuel from the VW....I would never
have imagined doing that...

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  • Gastonia, NC
Grace + Peace,
Bob
1995 BMW K75
2104 Honda CB1100 Standard 4 cyl
1994 Honda Magna 750 V4
1996 Kawasaki Vulcan 500

Offline euromog

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Re: 1991 K100RS Rescue
« Reply #11 on: August 10, 2014, 11:07:09 AM »
At least now I know I have a running engine to work with. I am going to have the tank TIG welded and then stuff a new fuel pump, filter (which is plugged up) hoses and a new gauge sending unit. Add a battery and the bike will be running. Not bad for something that sat over 6 years. I will check the valves and complete the  major servicing on it. Including new drivetrain seals. Then will have to rebuild the brake system.  I have already checked into the cost of parts I will need and will still be far below a $2500 to $3000 K bike. Also just because a bike is currently running with no issues doesn't mean the parts I will be replacing won't have to be replaced either withing a few years of purchasing. I will have the confidence that functional parts will be fresh for worry free riding. Off for vacation now and when I get back will be ordering parts.  :yes
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Offline pdg

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Re: 1991 K100RS Rescue
« Reply #12 on: August 10, 2014, 01:54:00 PM »
Quote from: euromog on August 10, 2014, 11:07:09 AM
Also just because a bike is currently running with no issues doesn't mean the parts I will be replacing won't have to be replaced either withing a few years of purchasing.

There's nothing to say those perfectly functioning parts on a running bike won't fail on the way home from buying it either.....

Used bikes bought privately are always a gamble.
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1988 K75S

Offline Scott Shand

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Re: 1991 K100RS Rescue
« Reply #13 on: August 25, 2014, 11:48:05 PM »
Superb work in getting her started and running! I am sure you'll do fine with the rest of the issues, sounds like you're determined and resourceful. I too bought a $500 K bike (an 88 K75S) and with another $300 or so, some scrounging around, plenty of elbow grease and some quiet evenings spent wrenching in the garage I now really enjoy taking the old girl out for a ride. I was out for a ride yesterday afternoon on her and went to Seabeck, WA near where we live. It was great and you'll have a great time with this as well. Keep at it!
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Offline k75newb

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Re: 1991 K100RS Rescue
« Reply #14 on: August 27, 2014, 04:32:37 PM »
Quote from: pdg on August 10, 2014, 03:53:09 AM
Nobody has any sense of adventure... Parts are cheap, rebuilding is fun - if everyone broke up every rescuable k because of minor issues like these there'd only be 6 left...

QFT
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Offline ackgs

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Re: 1991 K100RS Rescue
« Reply #15 on: August 27, 2014, 08:16:40 PM »
Looks like you have some good raw material there. Fix that thing up and enjoy it.
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1991 K75S
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