I've got a 1981 GS550L with a re-starting problem that I'm hoping someone might have some ideas about.
First, the basics: The bike starts up immediately (with choke on) if it's been sitting for a while (like overnight). I let it warm up with choke for a few minutes, and then can push the choke in and it will idle perfectly (~1100-1200rpm). No issues at all while I'm riding. Other maintenance items: brand new AGM battery this year, disassembled and cleaned the carbs last year, adjusted valve clearances last fall, new spark plugs and spark plug caps.
The problem: After I've been out for a ride (it can be as short as 15 minutes or as long as 1 hour), if I stop and turn the bike off (like to get gas), it won't start back up. The starter sounds like it's turning over well, but it just won't start. When this happens, I can push start it and it will catch and idle just fine. Alternatively, if I let it sit and cool down a little (usually >30 minutes), I can also then get it started again using the starter button.
My thought is that when the bike is hot, there's greater resistance in the electrical wires so that I'm getting some voltage drop before the coils that I don't get when the wires are cool. That might explain why it will push start (the starter isn't drawing current then), but I'm not entirely sure about this.
Any ideas?
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