Join Date: Jul 2002
Location: Pelham, AL, United States
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.
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)