82 GS850 running on two cylinders

[Steve]

Lost cylinders 1&4 while on vacation in Colorado a week and a half ago, bike came home in a U-Haul truck. :x

Dealer in Durango, Colorado (Fun Center Cycles) was very accommodating, taking the bike in on Friday afternoon. Worked on it for a couple of hours, then continued Saturday morning. For all the time they spent on it, only charged us for two hours.

Determined that it is NOT the plugs or wires. It is NOT the coil. Suspicions are that it might be the pick-up on the end of the crank or the amplifier box by the battery. Any suggestions on troubleshooting these two items?

[Steve]

Wow, this post has been here 2 1/2 days and has been viewed by 38 people, but NO repies.

With all the "wizards" on this board, I was hoping somebody might have a suggestion or two. I am busy right now changing the driveshaft on my Voyager, but will soon be turning my attention to the 850 and was hoping for some clues on where to start.

[Tool]

See this topic for starters:

http://www.thegsresources.com/_forum/viewtopic.php?t=10926

(search forums on "troubleshoot" and " ignition")

The easiest way with electronics if static tests are OK is to substitute suspect components - as long as you're sure something's not going to blow the replacement.

Another thing to check is moisture around the ignitor. That puts two of my cylinders out of action (under load) after an over-enthusiastic wash. Spray with WD40 or similar.

[samova]

Clymer Manual Has A Test

Clymer manual has a test for the igniter. You can do it with a voltmeter or a regular flashlight battery. I will send you a copy if you request.

[rustybronco]

First get a wiring diagram, a broken wire is a possibility do you have voltage at the coil? is there spark or not on 1 & 4? i assume that there is not, but i have to ask!