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Answer me this!
- tri650
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After rebuilding carbs (stock jetting) and petcock I would get a bad stumble after 6 miles. Next time it would start up and run great until I hit 6 miles. Cleaned carbs again. Rebuilt petcock only to find the crappy K&L rebuild kit was a culprit. It would not stop fuel when on On or Res. I ended up putting in old parts and that seemed to fix that problem.
Anyway, today I thought I would give it another try. It started to run rough shortly after take off and after about 3-4 miles I had the throttle pinned and was only able to go about 35 MPH. I flipped petcock to prime to make sure it was getting fuel. Still ran like crap for another mile or two then I switched it over to Run. I was about 100 yards from home and it started to perk up. I decided to keep riding and went about 25 miles without any issues. Ran fairly strong - slight stumble off of idle. It took it home and opened the pilot air screws a 1/4 turn and took for another ride. That helped the off idle stumble. Now running great.
This is what I don't like (or understand). After 3 weeks of tinkering, cleaning, adjusting, etc., it is now running great. I kept doing the same thing over and over expecting different results (definition of crazy person) What suddenly happened? I am afraid to take for a long ride given that I don't know what magically fixed itself after 20 hours of tinkering, etc.,
Guessing it was a fuel problem all along, just don't know what magically got fixed.
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- SWest
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- 10 22 2014
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Steve
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- Nessism
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I'd replace the petcock with a new OEM version or rebuild it with OEM parts. Also, make sure your fuel cap is venting properly.
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- tri650
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I will go with factory petcock replacement parts. The K&L stuff was shit. And $35.
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- SWest
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Steve
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tri650 wrote:
I will go with factory petcock replacement parts. The K&L stuff was shit. And $35.
I've had terrible issues with K&L brake system parts. It doesn't surprise me you had problems with the petcock parts.
BTW, I told Z1 Enterprises about one particular K&L master cylinder issue and they basically told me to stuff it. I still buy stuff from them but have not forgotten this.
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- SWest
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- tri650
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- bountyhunter
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But the flaky coil culprit is another prime candidate.... and NO, there is no way in hell you can bench test a flaky coil. It will read good then start arcing down after it warms up.
Guess how I learned that.
1979 KZ-750 Twin
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- Z1Driver
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Blue 1975 Z1B
Red 2009 Concours 14
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- tri650
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One more thing. The plugs all look normal. I did notice before that the 4th plug was not registering any color - just bare metal. I messed around with the plug wires to make sure there was a connection. Now that plug is tan.
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- SWest
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Steve
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