Stumbling at all RPM after trailering

[sethhope]

Tried the container for fuel flow and it looks normal to me. As for the wiring, where is a good place to start, and how can I tell whats passing current properly or not?

Battery is new and checks out on a seperate load tester.

[sethhope]

On a whim i tried the spritz test for a third time, this time i ran the engine at a bit higher rpm off the choke. Showing 1 and 4 arent firing as hot. Going to check ign. Coils and pu coils.

[sethhope]

Whats the right way to fix this?

[jetmechmarty]

If possible, a short uninsulated butt slice covered by heat shrink. I believe that is best. How are your soldering skills? Also, cover a solder splice with heat shrink. Solder splices are more prone to breakage than a good crimp splice.

If you have to replace wire, it needs to have very fine strands to be flexible enough for the job and the insulation has to be able to tolerate the heat under the cover.

On the bottom, it looks like you just need a terminal. Get an uninsulated one with a piece of heat shrink. Use a proper crimper.

[Radioguylogs]

Yeah!...a smoking gun.

[sethhope]

Ok, coil resistance is in spec, and all wires soldered to the best of my ability. Still have stumbling. Also have developed a jumpy tach??? Uploading a video of current idle status now.

[sethhope]

https://youtu.be/aqKdb-sRXB0

[JeffH]

When is the last time you removed the fuse box & plate and cleaned up the wiring connectors? If that hasn't been done recently then that is something to put on your To Do List. Especially the 3 Whites (behind the fuse box) since when dirty those are prone to getting hot and melting the connector.

Grounds been taken apart and cleaned?

What about a Carb Sync? Carbs pretty close to sync'd up?

If you ride it will it accelerate off idle and up to 40 or 50 mph without issue? Running on all 4 cylinders -or- seems like all 4 cylinders pulling about the same?
While it maybe misses a bit at Idle or low RPM on the Pilot Jets; if you are riding along at a steady 70 mph is everything ok now?

Jeff

[bikerphil]

Have you tried running the bike with the fuel taps in the "prime" position? Sometimes the vacuum hoses to the fuel taps can crack and leak restricting fuel flow.

[sethhope]

Sync looks good on my gauges. Have tried running in PRIME and it doesn't seem to change. Misses occur at all RPM ranges and speeds. Sometimes I can get it into a "sweet spot" where it seems to miss less, but the RPM or speed that that happens at seems to be random and inconsistent. All vacuum hoses and fuel lines were replaced when I cleaned my carbs yesterday.
Checked the carb boots as well, and there isn't any leaking. Sprayed with starting fluid and didn't see any RPM change.
As for the fusebox, a clean and check have been done. My fusebox was replaced with a more modern blade style box and doesn't have any corrosion or loose connections that I can see. I've been all over it with my multimeter and can't find any connections that seem wrong.
It could be a ground. Where are the grounds that I should be looking for? I cleaned the main battery ground and the ground strap on the transmission. Where else should I be looking?
Maybe I didn't fully fix my pickups? Is there a way to replace the whole wire from the coil back to eliminate some of the crappy joints going on? If not, are there replacement coils available?

To my ear, all this sounds like either bad ign coils or pickups, but both seem to be in spec and properly connected.

[soccer4m]

try these

Hi Seth,,,,you been busy,,,,a couple more things to try,
1. pull your plugs and see if any are not clean or damaged or gap is off, also check the plug wires for a short to the engine,,,,just wiggle with rubber handle pliers and look for sparks or engine missing

2. spray instant start again around the carb and carb connectors while running,,,,any change in rpm is a sign of air leaking in,,,also check the vacuum plugs on the carb boots,,,,many have had problems with cracks and are hard to see, without replacing,

3. battery grounds,,,,take off and clean good, or test with a jumper cable to the engine while running

4. jiggle the pickup coil wires while running, any rpm change is sign they are shorting out

5. all these are pretty common, have happened to me over the years,,,just keep knocking out the possibilities and its usually something small and easy..

Rock on,,,Mike in Sun DIego

[skids]

When I did my pickup wire repair on my current xs11, I did something unconventional. As I remember, I did use half of a butt connector on each wire as a crimp. I think that the oem length of the wires causes it to kink back and forth, so I provided a loop of wire on each to prevent kinking. There is some room in the case to do that, you just have to make sure there will be no rubbing. It worked and has been that way for a very long time.

[bikerphil]

It could be a ground. Where are the grounds that I should be looking for? I cleaned the main battery ground and the ground strap on the transmission. Where else should I be looking?

There is a frame ground between the transmission and battery, it is kind of hard to get that Phillips screw out but you may want to check it. Also where several wires are grounded at the voltage regulator mounting bolt.

[JeffH]

Wild & Crazy dumb idea but, JAT .................

The year I rode my xs11 E to Colorado Rally I about took it to a junk yard in Kansas. Had been running stellar but in Kansas it began running awful. I couldn't figure out why. When I got into eastern Colorado and filled up with my first tank of Shell 85 octane (normally run 87 octane 10% ethanol) it once again came to life and ran fantastic again. BA80 said Bad Gas in Kansas. He's had similar experiences there. Have you filled up since arriving in Missouri? If so, wonder if it was bad gas.

Again, dumb idea but mine was running very bad on that tank of Kansas gas I got.

+ what Phil said if you haven't, the Frame Ground at tranny and the frame Ground wire at the Reg/Rec.

FWIW, its certainly a project, but I fabricated a whole new wiring bundle from the Pickup Coils to the Connector by the fuse box. Pulled the wire thru a heat protected shield. While at it ran that pesky Neutral Switch wire separately so the 4 pickup wires traveled by themselves vs. adding a 5th wire there at the shifter. Works great, but it was a Project.

Jeff

[sethhope]

I did get gas here in MO. Might try a fresh tank from across town. Ill check all my grounds when i get off work today. Thinking of doing the pickup wire replacement after all this.