Still acting wierd. - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Carbs and Fuel System
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post #1 of 16 (permalink) Old 03-31-2007, 11:39 AM Thread Starter
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Still acting wierd.

Recently I did ear shave, coasters and installed a new tank. Now bike starts fine but something is off. After riding or just reving the engine my rpms level at about 3000 and very slowly drop down to 1100. The throttle is going all the way back, but engine acts like it has its own throttle. After the last ride I found myself adjusting the idle at lightsa to bring it down, only to stall at the next stop cause its now too low. Any ideas? I like doing the wrenching but Im almost to the point of dropping it with a mechanic and saying dont give it back til she runs perfect. As temps warm up outside, my free time is dwindling down to next to nothing thanks to work. Pretty soon if she isnt fixed to where I am not nervous about something going wrong and leaving me stranded, she will either sit all summer or have to be sold to someone with the time. Either way it will be unfortunate.

Tirrell

"Pandora"
2001 VN750
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Coastered
ReJetted
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Chome Oval Mirrors
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Last edited by ryn6609; 03-31-2007 at 11:47 AM.
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post #2 of 16 (permalink) Old 03-31-2007, 12:28 PM
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Tirrell, didn't you say you had some problem with the spring on the throttle linkage? If that spring isn't on right, the carbs will behave exactly as you're describing - you'll hit rpms at wherever you last had the throttle, but upon throttle release, the linkage is only slowly going to go back down. 1100 rpms is the right idle speed, but I'd take a good look at that spring again. Maybe pull your throttle cables and see what kind of action you get on the linkage without the cables attached. Also, as someone here suggested to me, try hooking up the cables one-by-one (after doing the above) and see if one of the two is causing the linkage to respond slowly.

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post #3 of 16 (permalink) Old 03-31-2007, 01:11 PM Thread Starter
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when i had the cables off the spring was good. I did have to play with the cables to get them to spring back when hooked up. Also I did just notice that when the throttle is all the way closed the cable sorta bows at the carb. like the cable is too long.

Tirrell

"Pandora"
2001 VN750
RR Relocated
Ears Shaved
Coastered
ReJetted
NC Street Shield EX
Chome Oval Mirrors
Custom Wood Floorboards
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post #4 of 16 (permalink) Old 03-31-2007, 05:14 PM
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Sounds like you may not have the cables adjusted properly. Either one is too loose, or the other is too tight.
I'd try adjusting the one that bows by using the adjuster up by the throttle end of the cable.


AKA: Tim & 'The Adventure Cycle' VROC #24567, NEVROC, SteelCity VROC


"When life throws you curves,
Aim for the apex."

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post #5 of 16 (permalink) Old 04-01-2007, 06:20 PM Thread Starter
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Well I tried adjusting the cables. First I did the one that had the bow. Once I got the bow out tightened it up and had no more spring. So I decided end my wrenching experience for now and let a professional do it. Found a guy that is working from his garage and can get the bike in immediately. Talked to him today and Im going to try to get it there tomorrow afternoon. He seemed like he knew what he was talking about as I explained what I had done so far. Ill let you guys know how it goes.

Tirrell

"Pandora"
2001 VN750
RR Relocated
Ears Shaved
Coastered
ReJetted
NC Street Shield EX
Chome Oval Mirrors
Custom Wood Floorboards
Stock Pipes Drilled
Dowco Saddlebags and Tank Bag
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post #6 of 16 (permalink) Old 04-01-2007, 07:54 PM
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Quote:
Originally Posted by ryn6609 View Post
Well I tried adjusting the cables. First I did the one that had the bow. Once I got the bow out tightened it up and had no more spring. So I decided end my wrenching experience for now and let a professional do it. Found a guy that is working from his garage and can get the bike in immediately. Talked to him today and Im going to try to get it there tomorrow afternoon. He seemed like he knew what he was talking about as I explained what I had done so far. Ill let you guys know how it goes.
After he's got it all set, make sure to ask him exactly what he did - or, rather, make him show you. I have a heckuva time adjusting cables - motorcycle, bicycle, whatever. But sometimes just having someone walk you through the steps is all you'll need. Glad to hear he can get you in!!!

C
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post #7 of 16 (permalink) Old 04-03-2007, 10:45 PM Thread Starter
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I dropped bike off last night and when I got home today I had this email waiting for me.

your bike is done.
there was some trash in the front cylinder's carb that was holding the float
valve open and flooding the front cylinder. the idle was changing because it
was actually dumping raw gas into the front cylinder and it wouldn't fire at
idle. too much gas. runs perfect now though. synced the carbs, lubed the
throttle and the gas cap. the throttle still sticks a bit, but it's not in
the carbs themselves, it's in the cables. i lubed them and it helped
slightly, but i'd recommend new throttle cables in the near future so it'll
work like new again. your gas gauge sender is shorted out, so it's not going
to work no matter what. i also adjusted your back brake and brake light
switch, it was pretty far out of adjustment. checked the bike over and
everything else seems to be in good shape. even checked the rear end lube to make sure it was topped off. she's ready to be picked up whenever you want to come get it.

I plan on going to pick it up tomorrow and if time permitting take the long way home. Plan on ordering some new cables soon tho. Hopefully Ill be able to get them on, but if not this guy works quick.

Tirrell

"Pandora"
2001 VN750
RR Relocated
Ears Shaved
Coastered
ReJetted
NC Street Shield EX
Chome Oval Mirrors
Custom Wood Floorboards
Stock Pipes Drilled
Dowco Saddlebags and Tank Bag
Kuryakyn Iso-Grips
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post #8 of 16 (permalink) Old 04-03-2007, 11:13 PM
HAWK
 
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Good News

Chad Falstad "Hawk"
Vroc #17649
2011 HD Ultra Classic "angel"
2001 Nomad 1500 Sold March 2012
2001 VN 750 "Sold June with 2008 with 21,000""Serinity"
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post #9 of 16 (permalink) Old 04-04-2007, 04:10 AM
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Sounds like a great guy to know for bike work


AKA: Tim & 'The Adventure Cycle' VROC #24567, NEVROC, SteelCity VROC


"When life throws you curves,
Aim for the apex."

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post #10 of 16 (permalink) Old 04-04-2007, 07:09 AM
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That's great, Tirrell! Happy riding...again!

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