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Picked up a new bike!


bigd

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Spray starter fluid around the boots between the carbs and motor. If it revs, you have a leak.

That too, it will sound doggy at low rpms but run ok at higher rpms.

And then be ok when sprayed. Another clue is it might run ok in the rain, which seals the leak.

Edited by ReconRat
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These bikes are finicky and require routine carb cleaning unless you're absolutely fanatical about maintaining the fuel system.  That's why they turn up with relatively low miles from time to time.  Somebody buys one, lets it sit for a long winter without prepping the fuel system, and in the spring it either won't start or runs like shit and they let it sit in some back garage.  TheGSResources.com is the all around best site.  Get a can of dip, buy an o-ring set on the site, pull the carbs, and follow the carb clean procedure to the letter.  It's a one day job and anyone can do it.  Just do your homework first and take your time.  

 

You can try spraying carb cleaner around the boots and make sure they're not old and cracked and leaking, you could get lucky.

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Sudden loss of power? That can come back? -> running on two cylinders - electrical

 

two coils, right? Each runs two cylinders - one of them isn't firing for whatever reason

 

it will feel like a funky 25% - 50% power, but will still make it home

 

edit: two of the header pipes will be cold

if it is all four pipes, it's probably a fuel problem or battery or whatever

 

I had the spark plug wires rot off my coils, I went to NAPA and got replacements

and replaced stock coils with Blue Goose hot firing coils - don't think those are available any more

 

 

Winner, winner! One of two coils was bad, because it was intermittent...after a ride, all 4 pipes would be hot...but on startup it was quickly apparent that 1 and 4 were cold. Replaced the coil, back on the road! Thanks all!

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Winner, winner! One of two coils was bad, because it was intermittent...after a ride, all 4 pipes would be hot...but on startup it was quickly apparent that 1 and 4 were cold. Replaced the coil, back on the road! Thanks all!

yup, it happens a fair amount on older bikes. Sometimes it's just the connections at the coil (or the other end). Glad you found it. Intermittent electrical isn't fun to trace. At least it cooperated for you.

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