1990 k100 LT - BMW Luxury Touring Community
  • 1 Post By alabrew
LinkBack Thread Tools Display Modes
post #1 of 3 Old Jan 11th, 2018, 7:03 pm Thread Starter
Junior Member
Join Date: Jan 2018
Posts: 2
1990 k100 LT

Howdy. Thanks for allowing me in the forum. I am a newbie to the K bike. I have an airhead currently and a k1600. I picked up the K from a gentleman that let it go into disrepair. I have had some keys made and am getting it to crank, but no pop. Was told it has a new fuel pump. Was wondering if the seat switch has to be pushed in( I was trying to start it with the seat up because I had just installed a new battery)? Also wondering about the keys. The ignition keys don't seem to fit the radio box cover or other right side "glove box". Could these just need lubed up or were they typically different keys? Open to input and thanks again.
maxmillion is offline  
Sponsored Links
post #2 of 3 Old Jan 24th, 2018, 1:46 pm
Lifetime Supporter
Join Date: Jul 2002
Location: Pelham, AL, United States
Posts: 548
Re: 1990 k100 LT

Max, Welcome, sorry, you got lost in a seldom frequented area.

No, The seat does not have to be down. You may be seeing an seat alarm button. I would think that the alarm would not allow cranking w/o it being turned off, but it does crank (and not start) if the side stand is deployed, so i may be wrong as none of mine has ever had an alarm.

You should hear the fuel pump cycle at key on.

Not too sure about the keys, the '85 has different keys for the bags but the '91 are all the same. Would expect the '90 LT to be all the same.

Have you checked out Motobrick.com? Great old k bike forum. Reading there will get your bike started, just have to go through the repair tree.
ljjohns likes this.


Kim Thomson
Motorcycle Cigar Smoker
05 K1200LT - The Golden Rocket Ship
91 K100RS - The White Stallion
85 K100 Standard - Big Red
79 R65 - "The Bee" is a buzzin' again!
06 525i - Premium, Sport, Comfort, Xenons

Gone, but not forgotten...
02 K1200LTC - Big Blue (accident at 40k)
88 K100RT - Chocolate (it was brown, melted - fire)
85 K100RT - (wore out)
82 Yamaha Vision - (electrics)
72 Yamaha R5C 350 - (broke trans)
alabrew is offline  
post #3 of 3 Old Jan 28th, 2018, 2:29 pm Thread Starter
Junior Member
Join Date: Jan 2018
Posts: 2
Re: 1990 k100 LT

Actually, found out that the alarm went out when I pushed down that seat button so I taped it for now. Also found that the fuel pump was shot and I had to replace it-along with some fuel supply lines that were not gas impervious. Cleaned up the plugs and it popped off and ran. Will work on those fairing box keys to get them freed up. Thanks for the reply, alabrew. Guess not much traffic on here for the k75 and k100. As for Motobrick, I tried for the last 2 weeks to get on there-no reply. I am going to try again today.
maxmillion is offline  

Quick Reply

Register Now

In order to be able to post messages on the BMW Luxury Touring Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

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


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

Email Address:


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
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
Dirty Oil Glass indicator K100 RT 1990 scoozy Other K-Bikes Discussion 4 Oct 24th, 2013 9:10 am
K100 issues martin280s Other K-Bikes Discussion 1 Jul 14th, 2013 2:36 pm
'85 K100 problem, battery hook up shutterbug1024 Other K-Bikes Discussion 3 Apr 25th, 2009 11:20 am
1990 Bmw K100lt, New Drive Shaft BREWSTER Bike Talk 4 Jul 2nd, 2007 10:21 pm

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