Cleaning Carbs - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Carbs and Fuel System
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post #1 of 4 (permalink) Old 01-12-2012, 04:38 PM Thread Starter
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Cleaning Carbs

I've only had the bike twelve days now and the bike sat for a couple years. Thought it would be best to pull carbs and clean. I checked the fuel level with a clear tube and they were both 1/8" above screw. Is this good? Going to drill out caps and back out mixture screws. Anything else I need to do with the carbs while there out (hoping this is the last time I have to remove them - PAIN)? One thing that caught my attention is the black soot in the tail pipes and in the reeds. Is it to rich? I was told everything is stock including the jets.. Thanks for you input!
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post #2 of 4 (permalink) Old 01-13-2012, 12:18 AM
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Hope you did really good job at cleaning the carbs, some others thought they did also but found out after installing it was not good enough. These carbs have very small holes that can easily get clogged. Make sure your gas tank is clean and well flushed, and no rust or dirt.Put Sea Foam in the gas when you first try to start it up. I would say that if you see that much black soot in the pipe, it was running very rich or it is burning oil. Check the plugs if it get running at all, also look for black or white smoke after running for a few minutes. Hope all goes well with getting it up and running.

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post #3 of 4 (permalink) Old 01-13-2012, 11:13 AM
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1/8" is a little high, but these bikes are jetted a little lean from the factory, so you may be OK, just check the plugs to see if they're fouling. The front and rear float heights are different, and from memory, the correct values are around .030"-.040" not .125"

If you are at sea level, consider upsizing your pilot jet one size and adding a couple of washer (needle) spacers under the needles, but your plugs can tell you a lot about how your mixture is running. When I did this to mine, I no longer have to touch the idle speed knob with temprature changes, and there is no more surging on the highway.
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post #4 of 4 (permalink) Old 01-13-2012, 08:12 PM
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Quote:
Originally Posted by Kelly2001 View Post
1/8" is a little high, but these bikes are jetted a little lean from the factory, so you may be OK, just check the plugs to see if they're fouling. The front and rear float heights are different, and from memory, the correct values are around .030"-.040" not .125"
Kelly is correct, front a rear fuel levels are different.

Quote:
From the Clymer manual, the correct fuel level reading is as follows:

Front carb: 0.8 mm (0.03") BELOW to 1.2 mm (0.047") ABOVE the upper edge of the lower mounting screw.

Rear carb: 1.2 mm (0.047") BELOW to 0.8 mm (0.03") ABOVE the upper edge of the lower mounting screw.
Hope this helps.

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