K100 electrical gremlin - K-Bikes.com - Excellence in Motion
 1Likes
  • 1 Post By Honolulu
 
LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old Aug 23rd, 2019, 9:58 pm Thread Starter
Noob
 
Join Date: Aug 2019
Posts: 2
K100 electrical gremlin

I have an issue with my 1989 K100. Bike was running perfect until a few days ago. Riding on highway and throttle stopped unexpectedly and then kicked back in.
Did this a number of times until it finally quit altogether. Got the bike home and I fear I have a ground issue somewhere. I noticed the fuel pump wasn't running when hitting the starter. Tried picking up the tank and as soon as there was movement the fuel pump kicked in. When moved again it kicked out. I fear the tank itself is acting as a ground to the frame. I am thinking this is due to a faulty fuel sending unit as the connector seems to be making good contact underneath the tank. Any help would be greatly appreciated.
bcoe is offline  
Sponsored Links
Advertisement
 
post #2 of 3 (permalink) Old Jan 25th, 2020, 6:21 pm
Member
 
Join Date: Sep 2008
Location: Honolulu, HI, USA
Posts: 119
Old thread, but my '85 K100RS would occasionally quit at inopportune moments, such as entering the freeway. It drove me nuts until I accidentally discovered that although the main ground wire from battery negative to trans case LOOKED good, there was sufficient corrosion between the wire strands and the crimped connector at the trans side, that it went discontinuous occasionally. Replaced the wire and alles gut!

It's a known problem on K100 bikes, although they are getting a bit scarce, so the knowledge is dying out.
Beech likes this.
Honolulu is offline  
post #3 of 3 (permalink) Old Jan 25th, 2020, 11:32 pm
Noob
 
Join Date: Sep 2016
Location: Invercargill, Southland, New Zealand
Posts: 13
Had same with my original K-RT ... on long trip, all OK. Stop for break, ign on & all looking normal - start & all goes out ... & relatively new (BMW!) battery. Can't remember how I swa it - think I was rechecking the battery terminal bolts - but found copper rust in crimp where earth cable went down to gearbox. Wiggled & everything behaving & starting again.

After this ALWAYS added extra earths onto all my Ks (except the K1200 which has it by default finally) - extra earth leads from the battery to all the high current users - starter, alt, frame earth ...
maxfnz 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



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