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See-through spark plug caps

  • Thread starter Thread starter brownford
  • Start date Start date
B

brownford

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Finally got around to working on my GS1100GK again. To recap, Cylinders 3 and 4 are doing most of the work, while 1 and 2 are doing very little. I don't believe it is the carbs because they were cleaned last fall. Cylinders 2 and 3 has fancy see through caps where you can see the spark. Would this detract from the intensity of the spark at the plug? I'm leaning toward an ignition problem(s) as cylinder compression is good and injecting propane into the synch port of 1 and 2 carbs does not effect idle speed.
 
I would think that the connection should be very snug to the tops of the plugs and not be arching around inside any of the caps. How would one expect the plugs to be getting the right electrical flow to have a hot spark...they wont.

Dude...as for OPEN SYNC PORTS...you got one massive vacuum leak on the cylinders...so why would you expect it to run right????
 
Last edited:
chuck hahn said:
I would think that the connection should be very snug to the tops of the plugs and not be arching around inside any of the caps. How would one expect the plugs to be getting the right electrical flow to have a hot spark...they wont.

Dude...as for OPEN SYNC PORTS...you got one massive vacuum leak on the cylinders...so why would you expect it to run right????
Click to expand...

I'm not stupid enough to try to run it with open vacuum ports. I run a hose to each port one at a time to my propane torch. Same basic priciple that is used by mechanics all over the world to locate vacuum leaks. I figured if it's a carb not supplying fuel then it should run better on the propane confirming I had carb issues. Since no change was seen then that leads me to believe something else (ignition) may be the problem. The caps themselves are not see thru, but the plastic above the cap where it attaches to the coil wire. Looks like some kind of novelty crap to me.
 
Put the sync bolts back in and get a can of starting fluid and give little squirts around the intake manifolds to see if there are vacuum leaks. Have a fire extinguisher always in the garage too.

The bike wont be able to get enough gas from the carbs properly with or without your tube sucking solid propane or air or any combinnation of the two. Button it up, start it, and then use the starter fluid around the seams.
 
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