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ok, carb? or coils?

  • Thread starter Thread starter rusted
  • Start date Start date
R

rusted

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I just put the bike together after purchasing it about 6 weeks ago. its a 80 850G, and was running great yesterday. I drove for about 20 min and jumped on a hwy. I reached about 70 and the bike just lost power. I drove home and pulled the carbs. To my surprise, the jets were all brand new, but they are 115, I don't know under the rubber plug, and the jet in the front was a 190. this is not correct for an 80 850 is it? But that shouldn't cause a sudden loss of power, and the bike has not come back to life scince. I have gone through the carbs, did I miss something?Helprusty
 
Before tearing into the carbs again, go through the full list of other verifications (visually verify spark, check compression, blah, blah, blah...) listed extensively in other posts (some by me) - use the search feature. One of these is bound to reveal the problem.
And yes, coils (and/or any of the other ignition components - igniter, pulse generator, etc.) can fail suddenly or gradually - especially if they are the original 25+ year old equipment.
 
It sounds like an electrical issue, often the bike will run fine until it gets too hot, than it will run poorly, or not at all.
 
Could be a petcock, coils or igniter.
I'd start with the petcock.
The 190 pilot air jet won't make you lose power.
 
You need to be really specific. What does "not come back to life" actually mean?

Is it turning over? Do you have lights on the dash? Is there charge in the battery? Does it turn over, cough, but not fire? etc. etc. etc.
 
Sudden death?

Make sure you have a good charge on the battery first. Pull the plugs and ground them to the block, turn the engine over and make sure you have a good blue spark in each plug, turn the lights off if you have to. This will pretty much eliminate electrical. While you're at it go ahead and check your voltage on the + side of the coils to make sure you have 10 to 12v of juice, 13.5 with the engine running, the more the better, but below 10 is getting bad.

If the ign is good then check your petcock diaphram. Pull the vac hose to the carbs, and the fuel line. Apply a vacuum to the small hose and fuel should pour right out.

Mine died just like that and it was a bad connection on the main coil + wire.
 
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