85 K100 Ignition Blues - K-Bikes.com - Excellence in Motion
 
LinkBack Thread Tools Display Modes
post #1 of 8 (permalink) Old Aug 23rd, 2006, 6:39 pm Thread Starter
Noob
 
Join Date: Aug 2006
Location: , ,
Posts: 6
Unhappy 85 K100 Ignition Blues

It all started out when I stopped for a construction delay on my way to Durango Co. a couple weeks ago. I shut K bike down to sit in line and it would not start up again. After trying several times to turn the bike on and off by the ignition switch it finnally fired up and ran like normal. I then stopped to fill up wtih fuel and the same thing happened but this time did not start. I took a friends advice and took apart the ground wires on the main part of the frame, cleaned them up with sandpaper (there was no corrosion) wiped them down with CRC electrical solvent as well as the bolt and nut on the frame, resambled them in the ordrer they came off with no luck. I also replaced the ignition switch, no luck.The start relay I ordered from Bobs BMW was the wrong relay and by matching numbers up it could be the horn relay. I did clean all the connectors on the start relay and did not see any corrosion or notice any discoloration from heat. Still no luck in starting.
Having the gas tank off the bike I was able to get into the compartment with the relays. No fried wires however when I turned the ignition key on the horn relay did some clicking made a humming noise as the tach danced around.

The new ignition switch neeted me the idiot lights go on until I hit the start button then they died. Even though the idiot lights were on the headlight did not come on.

This has been a very frustrating experience because the bike is stored 70 miles away and I can only work on it on saturday mornings when the shop is open and I have off from work.

Is there any possibility a kickstand switch or the start switch could be the gremlin in this bike?

Thanks for any suggestions.

GMAN
gmanzk100 is offline  
Sponsored Links
Advertisement
 
post #2 of 8 (permalink) Old Aug 23rd, 2006, 8:23 pm
Veteran
 
Join Date: Jul 2004
Location: , SoCal., USA
Posts: 1,507
Gman
These bikes are notorious for corroding contacts and ignition switches going bad. If the bike cranks over, look near the coil pack. The black grounding wire off the coil pack is grounded directly to the frame under a screw head in that area and is prone to loosen or corrode. Also the two-position kill switch has problems.
For more early "K" information that I can possibly give you, please look thru the following site: www.ibmwr.org/ktech.shtml. You can thank me later.

Bruce C
'04 K1200RS Capri Blue(totaled)
2008 Triumph Sprint ST
brucecha is offline  
post #3 of 8 (permalink) Old Aug 23rd, 2006, 9:23 pm
 
Join Date: Jan 2006
Posts: 67
On a similar problem with my K100, I pulled the starter, disassembled, cleaned the brushes, reassembled, replaced the starter solenoid and it fired right up. The info on how to do this is on the ibmwr.org tech site referenced in the preceding post. Good luck!
bwbcpa is offline  
Sponsored Links
Advertisement
 
post #4 of 8 (permalink) Old Aug 24th, 2006, 3:19 pm
 
Join Date: Jun 2003
Posts: 686
A common failure is for the large plug for the FI computer to get loose under the tool tray. try reseating that too.

BUTT, If you tach needle is jumping around without it running it is very likely the Hall effect sensors have gone out on the front of the motor. It may make noises resembling electrical arcing which is the plugs firing randomly. Some people rebuild those I think which is good since the new ones are expensive

I'm assuming the bike turns over right?
eric2 is offline  
post #5 of 8 (permalink) Old Aug 27th, 2006, 8:46 am
Member
 
NY1200GT's Avatar
 
Join Date: Feb 2006
Location: Gansevoort NY, Burlingame, CA, USA
Posts: 65
GMAN,
Had the exact same problem with my 85 KRS, take apart the starter (a key electrical ground point), clean it out (worn carbon brushes) and replace the brushes.
Ray

Ray
04 GT
BBG1500
NY1200GT is offline  
post #6 of 8 (permalink) Old Aug 27th, 2006, 10:19 pm
 
Join Date: Jan 2006
Posts: 67
Quote:
Originally Posted by NY1200GT
GMAN,
Had the exact same problem with my 85 KRS, take apart the starter (a key electrical ground point), clean it out (worn carbon brushes) and replace the brushes.
Ray
What he said...
bwbcpa is offline  
post #7 of 8 (permalink) Old Sep 20th, 2006, 1:27 pm
 
Join Date: Jul 2006
Posts: 7
If your idiot lights are going out, you must have too much resistance somewhere (a short). Check the wiring to the kill switch for voltage and then make sure the switch works. Then check the wiring downstream until you find the loss in volts or amps.
It's a piece of cake to track these gremlims down with a good multi-meter.
Andros is offline  
post #8 of 8 (permalink) Old Nov 26th, 2006, 5:45 am
 
Join Date: Oct 2005
Posts: 2
Had the same problem...............nearly drove me nuts

After replacing everything but the haddlebars, I by chance, found a broken (cracked) ignition wire.

1985 K100 runs prefectly now
K100David is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the K-Bikes.com - Excellence in Motion forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
K100 Buying Advice? paulstamser Other K-Bikes Discussion 17 May 27th, 2009 1:50 pm
Stuff about my "New" '85 K100 paulstamser Other K-Bikes Discussion 2 Jul 17th, 2006 10:36 am
New 87 K100 question WillR Other K-Bikes Discussion 5 Jun 28th, 2006 1:04 pm
Barbacks on a K100 bwbcpa Other K-Bikes Discussion 8 May 11th, 2006 1:38 am
K100 Buying Advice? paulstamser Bike Talk 6 Jan 3rd, 2006 8:43 am

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome