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post #1 of 7 (permalink) Old 05-07-2011, 08:32 AM Thread Starter
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adjustment screws

Where are the screws to adjust air/fuel mix located on the carbs? Just got the bike and don't have a manual yet. I want to make sure they are set at the recommended 2 1/2 turns out.
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post #2 of 7 (permalink) Old 05-07-2011, 10:14 AM
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At the front of each carb, angled toward the cylinders. If you have a very rare Vn** the previous owner(s) may not have removed the factory "caps" (small alum inserts that block access to the adjustment screw/needle). If so, you'll just see what looks like a round port that is plugged. Just use a very sharp tool and pierce the cap, then gently pry out. The adjustment needle head is pretty far down the hole, and you'll probably need something like a very short pan head screwdriver to get at it. I use a small hex-head bit (the kind that are removable/interchngeable) to fit in the tight space.
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post #3 of 7 (permalink) Old 05-07-2011, 11:03 AM
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K9 welcome to the forum. If you search this site there is a post by Kanuck69 of a "New & Improved Repair Manual" that will answer all your questions. No need to buy one it's all here.

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post #4 of 7 (permalink) Old 05-07-2011, 12:46 PM Thread Starter
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Thanks guys
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post #5 of 7 (permalink) Old 05-07-2011, 12:58 PM
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Here ...see post #16
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post #6 of 7 (permalink) Old 05-07-2011, 02:34 PM
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Quote:
Originally Posted by k9sarky View Post
Where are the screws to adjust air/fuel mix located on the carbs? Just got the bike and don't have a manual yet. I want to make sure they are set at the recommended 2 1/2 turns out.
Here is a link to a picture in the gallery. It is a bit blurry, but you can see where the a/f mixture screw is located.
https://www.vn750.com/photopost/showp...to=681&cat=548

Just a suggestion for setting the a/f mixture screws.
Start at 2 turns out and take a test ride until the engine is well warmed up.

If needed, continue to turn the screw out a 1/4 turn at a time until the popping stops or reduces enough to satisfy you.
The front and rear cylinder may not need the exact same number of turns, but they should be close.

3 1/2 turns out is about maximum. At 5 turns the screw will fall out.
When finished adjusting, re-seal the opening with a dab of silicone.

Gordon

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Purchased May 16, 2008
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post #7 of 7 (permalink) Old 05-08-2011, 01:59 PM Thread Starter
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Got the carb's done yesterday since it was raining. The caps were still over the screws, but easily removed. I was able to use a flat screwdriver hex bit and a 1/4" wrench to turn the screws. Gently bottomed each one then turned them out to recommended setting. Hope to try it this afternoon.
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