Wont run good under 3k

[Bulldogx11]

Hi on my 1994, i changed my plug wires ,caps and ,plugs . Number two plug was stuck finally got it out after two weeks of spraying ,and patience. Had run it on 3 new ones and the stuck old plug and it ran bad i figured the penetrating oil fouled the plug. Got all 4 new plugs in and it stiil ran bad... Changed some of the caps and seem like it was alittle better. Oh and bike has been sitting over winter full tank with stabilizer.. Test drive was rough no real power till i hit 3 k ish then it ran great. I used 7mm solid core wires ngk caps and ngk plugs . When i took out number two wire from the coil there was alittle oil on it ,spray it out with contact cleaner,does tiny bit of oil mean coil is fried?? Might be stupid question but if the plug wires are touching is that a problem?? Cant really check spark on number 2 and 3 cyl cuz you got to hav battery in , hard bike to work on... I have irdium plugs but didnt want to put in till it was running rite ... Im kinda lost here and everytime i got to work on coil area gota take radiator back out... So to sum up rough and no power like it running on 3 cyl till i hit 3 grand . And bad idle. At my breaking point , thanks for any advice in advance... Mike

[Nails]

I chased a similar problem that turned out to be a stuck piston ring secondary to a damaged spark plug. My problem might be cropping up again, so far as a rough idle. Perhaps like yours. I'm about to replace the plugs/wires, and interested to see what the plugs look like.
There are only about a brazilian possible sources.

You might be able to narrow down the problem by identifying the bad cylinder -- if there actually is one -- by looking for the exhaust pipe that is slow to get hot. You can check the plugs for evidence of poor fuel mix. You can try swapping wires (same coil) or even swapping coils (they're identical except for a reversible bracket) to see if that identified bad cylinder changes. You can check compression -- takes a long adapter tube. (Fuel, spark, and compression mantra.)

Good luck.

[Bulldogx11]

I just remebered while i had the fairing off ,i figured i would clean the big ten or thirteen (cant remember) pin connector . Could messing with that give me a weak spark at low rpm ...

[Bulldogx11]

Oh and i used dialectric grease , probably to much, .always thought it was ok but i googled it and people are saying it can make a bad connection. I have read on here to hard wire and solder that connecter but not a good solderer lol . Can screwing with this connector cause weak spark?

[cushman eagle]

Just a thought Bulldogx11,see if your voltage is low at low RPM,giving weak spark.

[SgtSlag]

Yes, a bad connection can cause stumbling. The engine vibrates, when running. A loose connection can pull apart and reconnect, several times per second. When the cap and wire pull apart, it will either be open (no spark), or it will arc across the gap, robbing the plug of the energy it needs to fire. If you are not comfortable with making solid connections with the caps and wires, it would be best to take it to a professional, to eliminate the possibility of this being a problem.

On my CB750, the OEM coils were weak, from the factory (1979). When I bought it (2006), the coils were even weaker. I considered installing new, high-output coils (x2, like the Voyager, they fire during the exhaust stroke), but they were expensive. I opted to install NGK Iridium plugs, instead.

With the old plugs (good condition, but not Iridium), I would have to grind the starter for 5-6 seconds, give it a rest, then grind again, to get it to fire. After I installed the Iridium plugs, I touched the starter button, and the bike was running, instantly! I actually jumped -- it never started instantly, before... The NGK Iridium (platinum) plugs require less enegy to fire. They gave that old Honda new life. I installed Iridium plugs in my Voyager because I knew they were far superior to regular plugs -- and my Voyager never had issues starting with regular plugs. Those Iridium plugs will rarely fail to fire. Piece of mind is worth every extra penny they cost me to install in my Voyager. Cheers!


PS:

In a car, platinum plugs will last for 100k miles. In a bike, I hope they last 100k -- that will be longer than I will last... Just sayin'.

[Bulldogx11]

I have putting the plug caps on the plug wire down pat, pretty simple after you do it ten times lol. I was talking about soldering the ten pin big connector. I checked voltage on both sides ,no drop in voltage. I cleaned that connector anyway. Must have to be a great solderer to do that on the bike , kawasaki didnt want to waste any wire the connector has a two inches play on both sides. I changed the plugs to the iridiums yesterday and redid the spark caps .Checked the secondary loop on the coils that was ok could quite get to the input wires for the coils to check that side yet. Guna test it out tommorrow again thanks

[dr_makoki]

I also mounted the iridium plugs in my Voyager and, really, the good result they give is surprising, the start is instantaneous and the need to keep the starter on cold mornings is only a matter of seconds, almost immediately you can maintain the idle without need to close the air

[cushman eagle]

I like messages of good results thank you

[SgtSlag]

Now that the running issue is out of the way... Ride! Cheers!