Join Date: May 2019
Location: Lake Macquarie, NSW, Australia
Welcome to Tengai ownership. Great versions of a great bike.
All generation 1 KLRs share the same basic wiring the only difference for the B Model Tengai to the normal A model bikes are some minor variations around the instruments to suit their different set up. So download any of the ones available on the web. My favourite is one labelled "Professor Jim's 1995 KLR 650-A9 model" - being in colour it is much clearer than any of the ones official black and white ones.
The problem could be the coil or the CDI but I think it is highly unlikely, being electronic items these do not suffer from just sitting, unlike the more mechanical bits of the bike. The more likely cause is bad earth's (very possible), bad connections and or broken wires. I think you now need to check all the wiring of the ignition circuit thoroughly checking for continuity as you go. Good luck this is one of those jobs that is easier said than done, but at least when you do find the fault is usually easy to fix.
One specific area I have had problems with on several old KLRs are the safety switch circuits designed to stop you starting in gear/riding with the side stand down. These are fiddly to check. A simple way to by pass them totally is to join (use a Scotch-Block or similar) a new length of wire to the red-black wire coming out of the CDI unit and then connect this wire to earth. If this solves your problem you at least know which part of the wiring to concentrate on (or simply leave it in place, mine has been there for years).
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