Evening Folks,
I own a 1982 GS650GL, much thanks to the existence of this forum. Eventually I will get photos up. Disclaimer, little to no electrical has been done, cleaning connections was done. Here's the story:
Not so much a problem, but a conundrum to think about. This past season I had problems with getting sporadic changes in fuel consumption despite having rebuilt the carburetor with new seals (including the fiddly little ones on 1 and 4 carburetor). I made sure to bench sync the unit using the guides by bwinger, and use a carbtune when I got it running to tune. I adjusted the four idles a bunch and my idle air knob. Yes I did replace the boot o-rings and checked for vacuum leaks (hot idle rpm creep). I got myself a gunson colortune, and despite my initial chinsy impression it did it's job. I was able to see the spark and fine tune the mixture.
Here I am happily going along and tweaking the mixture, thinking maybe a spark isn't firing. Welp around cylinder 2 I see little to no spark and hear a crackling spark noise still. No the wire wasn't broken, but the spark plug boot resistor was, as I found out later. All that charge had no where to go except my hand when I went to adjust the plastic mirror on the colortune, thinking I misaligned it. Zat, and I sprung my hand off, shutting off the bike afterwards. There was no damaged chord, nothing frayed, spark plug had continuity even if it was worn down. It was
about this time I started looking up replacement parts and right there in the spark plug boot listing was a resistance of 5k. Huh, I can check that and sure enough the spark plug was bad. I was concerned about the coils despite measuring 4.3 ohms and 33 ohms on the primary and secondary. Hence, I decided to buy RMstator brand coils as I had seen recommendations for their stators from this forum. Surely if they build a stator, they can build an ignition coil. They worked, welp the one didn't though nothing showed wrong with the resistance, no problem easy return. Between replacing the plugs, boots, and before replacing the coils my gas mileage shot up to 60 mpg from 45 mpg (multiple weeks). Great, eventually I got working new coils in, and replaced the olds coils (which I still have). Except now my gas mileage tanked back down to 45 mpg (similar routes of course). I did flip the parts in and out to verify, and everytime the mileage switched. It seems to be just the one that powers 2 and 3. All cylinders now have spark and fire, no more shocks to the poor hand Here is where I stopped for the season, as it was November. Too cold to troubleshoot the bike.
Now that it's warm again and parts buying season is here, I am here trying figure out where to get an igniter module, the back up plan being go back to using the old working coils. With that
story pending, any thoughts on places to buy from or other things to try? Also I think these coils are original with a tan color.
Regards,
Kemp
I own a 1982 GS650GL, much thanks to the existence of this forum. Eventually I will get photos up. Disclaimer, little to no electrical has been done, cleaning connections was done. Here's the story:
Not so much a problem, but a conundrum to think about. This past season I had problems with getting sporadic changes in fuel consumption despite having rebuilt the carburetor with new seals (including the fiddly little ones on 1 and 4 carburetor). I made sure to bench sync the unit using the guides by bwinger, and use a carbtune when I got it running to tune. I adjusted the four idles a bunch and my idle air knob. Yes I did replace the boot o-rings and checked for vacuum leaks (hot idle rpm creep). I got myself a gunson colortune, and despite my initial chinsy impression it did it's job. I was able to see the spark and fine tune the mixture.
Here I am happily going along and tweaking the mixture, thinking maybe a spark isn't firing. Welp around cylinder 2 I see little to no spark and hear a crackling spark noise still. No the wire wasn't broken, but the spark plug boot resistor was, as I found out later. All that charge had no where to go except my hand when I went to adjust the plastic mirror on the colortune, thinking I misaligned it. Zat, and I sprung my hand off, shutting off the bike afterwards. There was no damaged chord, nothing frayed, spark plug had continuity even if it was worn down. It was
about this time I started looking up replacement parts and right there in the spark plug boot listing was a resistance of 5k. Huh, I can check that and sure enough the spark plug was bad. I was concerned about the coils despite measuring 4.3 ohms and 33 ohms on the primary and secondary. Hence, I decided to buy RMstator brand coils as I had seen recommendations for their stators from this forum. Surely if they build a stator, they can build an ignition coil. They worked, welp the one didn't though nothing showed wrong with the resistance, no problem easy return. Between replacing the plugs, boots, and before replacing the coils my gas mileage shot up to 60 mpg from 45 mpg (multiple weeks). Great, eventually I got working new coils in, and replaced the olds coils (which I still have). Except now my gas mileage tanked back down to 45 mpg (similar routes of course). I did flip the parts in and out to verify, and everytime the mileage switched. It seems to be just the one that powers 2 and 3. All cylinders now have spark and fire, no more shocks to the poor hand Here is where I stopped for the season, as it was November. Too cold to troubleshoot the bike.
Now that it's warm again and parts buying season is here, I am here trying figure out where to get an igniter module, the back up plan being go back to using the old working coils. With that
story pending, any thoughts on places to buy from or other things to try? Also I think these coils are original with a tan color.
Regards,
Kemp
