95 VN750 throttle hesitates running rich.. - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 10 (permalink) Old 08-16-2012, 07:49 PM Thread Starter
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95 VN750 throttle hesitates running rich..

Hi, I'm new to the forum.. I picked up a 95 Vulcan 750 w/63,000 miles on it a few days ago..I knew going in that it needed a little TLC so I put new spark plugs, wires, fuel system cleaner, oil and filter change, and about 3 hours worth of cleaning/detailing..Its a beautiful bike with chrome to spare! While doing the above maintenance I noticed it was running really rich and hesitates off the line.. Its cold blooded also but it hesitates after its warmed up too.. As far as I know the bike is all stock.. Original pipes, carb jets, etc,,etc.. My question is where are the fuel/air mixture screws and whats the best way to adjust them..I love the bike and really want to do my own work on it.. If anyone can give me advice it would be awesome..

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post #2 of 10 (permalink) Old 08-16-2012, 08:11 PM
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hold on im gonna get a pic for you
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post #3 of 10 (permalink) Old 08-16-2012, 08:14 PM
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that is the air fuel screw at the tip of my finger of course there is one on the other side as well on our vulcans going in is leaner and out is richer 2 1/2 turns out is stock settings and if they have never been fooled with there may be metal caps covering them you only have five turns before they fall out hope this helps

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post #4 of 10 (permalink) Old 08-16-2012, 09:24 PM Thread Starter
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Cool..Thanks

I'm working on removing the lead plugs right now..Unfortunately it just started raining cats and dogs here so a test drive will have to wait till morning,. Thanks for the picture too!! So far the forums have been WAY more helpful than any other place i found on the internet.. Glad i signed up.. Thank Again.. Hopefully my next post will be about how awesome she's running..
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post #5 of 10 (permalink) Old 08-16-2012, 11:57 PM
Crap, I WAS in 5th gear.
 
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I'm not trying to be a downer, but you may need to go through the carbs. Before you take them off, check the float levels. Before you do much else, clean your air filters and wring as much oil out of them as you can- that may lean it out a tad.
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post #6 of 10 (permalink) Old 08-17-2012, 12:55 AM
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Quote:
Originally Posted by Kelly2001 View Post
I'm not trying to be a downer, but you may need to go through the carbs. Before you take them off, check the float levels. Before you do much else, clean your air filters and wring as much oil out of them as you can- that may lean it out a tad.
damn good advice but on the air filters it would be best to just throw the stock ones away and bite the bullet to buy a set of k&n filters your bike will thank you in the end if the stock filters get too wet they fall apart and suck right into the carbs

if your bike is stock i wouldnt touch the air fuel mix if it still has the caps on you shouldnt have to adjust them unless you are doing mods to the bike
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post #7 of 10 (permalink) Old 08-17-2012, 12:57 AM
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Quote:
Originally Posted by Kelly2001 View Post
I'm not trying to be a downer, but you may need to go through the carbs. Before you take them off, check the float levels. Before you do much else, clean your air filters and wring as much oil out of them as you can- that may lean it out a tad.
Welcome to the Vulcan madness bmonty777.

X2 to what Kelly says above, EXCEPT DO NOT WRING OR TWIST THE FOAM FILTERS TO REMOVE EXCESS OIL.
The foam pieces are glued together and mechanical stress of wringing or twisting may cause the seams to come apart prematurely.

Put the filter between layers of a clean shop cloth on a shop bench and PRESS the filters repeatedly until a clean cloth doesn`t show any noticeable amount of oil after pressing.
Too much oil in the filter will restrict air flow and cause a rich mixture.

A dab of silicone sealant over the fuel/air screws after adjustment will keep the screws in place and prevent loss of same.
It is easily removed later if needed too.

Gordon

1991 VN 750 -"Cosmic Lady" or "Bad Girl"?
Purchased May 16, 2008
Approx.19,300km (12,000 miles)

H-D windshield
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July 13, 2016, Riding on the DARKSIDE now, Classic Radial 165/80-15


TOP TEN THINGS A NEW RIDER/OWNER SHOULD DO. Click on link.
https://www.vn750.com/forum/11-vn750-general-discussion/9127-top-ten-items-you-would-suggest-new-owner-do-his-new-ride.html

Last edited by OlHossCanada; 08-17-2012 at 01:04 AM.
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post #8 of 10 (permalink) Old 08-17-2012, 03:42 PM Thread Starter
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Thanks guys.. I'm gonna clean the air filters now..Making sure to be careful with them while drying.. I have another issue with the engine oil drain plug..The previous owner stripped it down to a nub.. Is the larger bolt on the bottom of the oil pan another drain plug? Cause its in dyer need of some fresh oil.. I tried everything to get the side plug out with no luck..Heat, penetrating lube, vise grips, and a hammer..(to gently tap the vice grips after the heat was applied).. My GF and I have a trip planned for this weekend and I really don't want to drive my truck if I can help it,..lol Thanks again..
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post #9 of 10 (permalink) Old 08-17-2012, 04:15 PM
Crap, I WAS in 5th gear.
 
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Quote:
Originally Posted by bmonty777 View Post
Thanks guys.. I'm gonna clean the air filters now..Making sure to be careful with them while drying.. I have another issue with the engine oil drain plug..The previous owner stripped it down to a nub.. Is the larger bolt on the bottom of the oil pan another drain plug? Cause its in dyer need of some fresh oil.. I tried everything to get the side plug out with no luck..Heat, penetrating lube, vise grips, and a hammer..(to gently tap the vice grips after the heat was applied).. My GF and I have a trip planned for this weekend and I really don't want to drive my truck if I can help it,..lol Thanks again..
Yes- that is a drain plug. But it is a good idea to check the oil screen when you change your oil, as you can get evidence of a balancer problem, or worse. Just use the bottom plug and fix the side one later.
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post #10 of 10 (permalink) Old 08-17-2012, 06:03 PM Thread Starter
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Smile I got lucky!!

After several attempts i was going to give up.. I decided to grab the washer looking part just behind the mutilated plug head that holds the O ring..It came loose and I'm happy to announce the spring and inner screen were clear of any tell tale signs of damage..The filter fought me every step of the way as well.. I ended up hammering a flat head screw driver through the side near the non-threaded end (to avoid damaging the inner threads) then put a breaker bar on it to get it to turn.. I put anti seize on the drain plug and plan on ordering a new one later tonight after the ride,,.. Thanks for the help!! I'm sure you'll see more posts and more questions from me in the near future.. Have a great weekend,.I'm heading out for a ride..
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