Engine dies when hot

[Fil]

Hello,
I Bought my cousin a 1983 GS650L last summer for his first bike.
I went thru it all and it ran great.
This summer when the engine gets hot, on the highway 55-60, the engine shuts down, off. Wont start back up until it cools down some.
What should I look for?
Thanks,
Fil

[quakeholio]

I'm thinking that the coils or some other part of the electrical system has failed, and only shows itself when it's warmed up.

[semerm]

Or it could be running lean and then heat up when it has been on higher rpm for a while. What is he color (no kidding) of the exhaust pipes? Have then recently turned a blue hue? If so I'd suspect a lean carburation issue.

[tconroy]

Hello,
I Bought my cousin a 1983 GS650L last summer for his first bike.
I went thru it all and it ran great.
This summer when the engine gets hot, on the highway 55-60, the engine shuts down, off. Wont start back up until it cools down some.
What should I look for?
Thanks,
Fil

how long does it take before it shuts down.if you ride slower does it still happen?Have you looked for any hot or discolored wires anywhere?

[Guest]

Old failing igniters can be heat sensitive.