Air/mix screw plugs - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 7 (permalink) Old 09-22-2016, 12:23 PM Thread Starter
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Air/mix screw plugs

Hi,

So, I have some popping during deceleration, and want to adjust the air/mix screws to see if that helps. My question is, without a drill, how in hell do you remove the metal (lead?) plugs? The carbs are oriented in such a way that I can't get to the plugs straight on. I'm thinking I can lightly hammer in a screw to create a hole and then use a pick to pull the plug out? I just don't want to brake anything expensive, and if i hammer in at an angle that may put a lot of force to the back of the screw housing. I really don't want to pull the carbs, haha. This bike had been coastered with a black epoxy by the previous owner that looked like they were leaking air, so i recently bought and installed proper metal coasters. I also think I may have to replace the exhaust pipe crush gaskets (especially the right side as it is popping far more than the left and seems to be getting worse) and I will get the Harley gaskets and do that later this week. Thanks in advance for your advice!


Brett
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post #2 of 7 (permalink) Old 09-22-2016, 12:59 PM
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The plug is kind of thick maybe around 1/8 inch I forgot. The angle is really weird and will be hard if you don't want to remove the carbs. Maybe you can use a small sharp screw to pierce the plug and then yank the screw out.

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post #3 of 7 (permalink) Old 09-22-2016, 01:06 PM
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Hitting it with a hammer might drive the plug further in, and the edges of the hole are thin cast aluminum, which you can easily break.....

So be careful!

(You don't own an electric drill?)

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post #4 of 7 (permalink) Old 09-22-2016, 02:06 PM Thread Starter
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I don't own a drill, haha. I've never worked on any kind of machine before. I just asked a buddy if I he had one and he does, So I will use his ( very carefully). Since I'll be going in at an angle, I will drill a shallow hole, and then use a screw to pull it out. Hopefully that works!
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post #5 of 7 (permalink) Old 09-22-2016, 04:36 PM
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Put a piece of tape or a tiny length from a straw, or something on the drill bit to make sure you don't drill in too far. The plug is like less than a 1/8 inch thick, and you don't eat to drill in any farther....
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post #6 of 7 (permalink) Old 09-22-2016, 05:38 PM Thread Starter
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Awesome! I'm going to do the air/mix screws and a carb back flush tomorrow. I'll let you guys know how it goes.
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post #7 of 7 (permalink) Old 09-23-2016, 06:39 AM
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In the pictures are the external air valves. Replace the diaphrams inside of each one. They could also be your problem.

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