Question about 1981 Suzuki GS 750 L

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I have a totally stock 1982 GS1100L which ran fine until one day after sitting over the winter it wouldn't rev past 4000 rpm. It idles fine but if you snap it open it just bogs if you open it up slowly it will get to about 4000 and just blubber and make slight missing / popping sounds. I replaced the igniter and that didn't fix it so I completely pulled the carbs apart, cleaned all the jets, made sure the air passages were open, checked the diaphragms and still had the same problem. I am 100% sure this is not a carburetor problem. So today I got it running and revved it and heard a pop near the headlight and all the lights went out but the bike kept running until I shut it off and saw smoke coming from the igniter unit which has obviously been fried. Now when I turn on the key and hit the starter it does nothing, like the battery is missing. I know the igniter is shot but can anyone tell me why before I put another one in and fry that one too. Thanks.

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You are going to need to pull the headlamp unit off and fuel tank and find the wires that shorted together.
Usually if your going to get a sort its in the area of the steering head and headlamp housing,there is suppose to be a rubber ring on the headlamp housing so the sharp edge of the headlamp housing will not cut into the harness if it is not there most likely that's what happen but that's my guess.

Posted on Jun 06, 2010

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I have a problem with a 1982 Suzuki GS1100L. The bike ran fine until it sat over the winter now it starts and idles fine but will not rev past 4000 rpm. It just bogs down and stalls if I don't let off the...

Theres a lot of stuff relating to these bikes (i have an 82 GS%%)l, and have found GSresource website a fantastic place to learn, and get advice. Your particular problem may be more electrical than fuel/air, a fair few common faults with these. A, the 3 phase stator has an unessesary lead going up into the loom for the headlight - it doesn`t need it, it just feeds back down to the r/r. unplug the lead from the stat - find where the lead comes from light back to r/r - unplug it, plug the stat lead directly to the one you unplugged feeding into the r/r. That will save ur stat burning out and enliven some power back to coils. B, look for an ignition relay mod for the gs, it will give you direct feed from live to coil (its a long, long thread) its called `coil relay modifications for the gs` i can`t remember where i got it so i can`t do a link at mo - sorry. C, when you`ve done this check timing with a gun - ur advancer may need attention or be fouled up. If you got cash buy a dyna s for it (and coils if ur really flush). Do all these and you`ll probably be better off than you`ve ever known the bike to be. I also run splitfire plugs in mine, they make a lot of difference too. I hope this helps m8.

Jun 08, 2010 | 1981 Suzuki GS 750 L

1 Answer

Ngine over fueling at all rpm, rough idle, heavy fuel consumption

if the car is stock i would replace your oxygen sensor. you may also need to clean out the MAF sensor.

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