Throttle response - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 12 (permalink) Old 06-21-2012, 08:22 PM Thread Starter
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Throttle response

I've noticed for a while that when I rev the throttle while in neutral, the revs take a few seconds to come back to idle. Like if I rev it up to about 5k, it takes about 3-4 seconds to come back to 1k. I notice that with most other bikes, it's much faster, like a second or so. I only became aware of it in the last few months, but for all I know it may have been going on the entire time I've had the bike. Is this normal for the Vulcan, or is there something going on with my carbs and/or throttle cables?

'95 Vulcan 750 - Purchased 8/2003 w/ 21,124 miles - passed 50K 9/3/15
* VN900 seat * Daytona handlebar * Converted ACCTs to MCCTs * Relocated R/R * Drilled clutch basket * Coastered * Repainted *
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post #2 of 12 (permalink) Old 06-21-2012, 09:51 PM
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Mine drops pretty fast. It could be somewhat lean causing it to be slow on deceleration.

Mine was hanging up a bit, but I am not sure what I did to fix it. I retightened all the boot clamps, etc.

Make sure you have no cracks in the carb boots, or airbox. Make sure the air filters are in good condition, etc.

1986 Kawasaki Vulcan 750
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post #3 of 12 (permalink) Old 06-21-2012, 10:16 PM Thread Starter
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The filters are new from when I put in the motor. I think the boots are all fine, but I'll check them to be sure.

'95 Vulcan 750 - Purchased 8/2003 w/ 21,124 miles - passed 50K 9/3/15
* VN900 seat * Daytona handlebar * Converted ACCTs to MCCTs * Relocated R/R * Drilled clutch basket * Coastered * Repainted *
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post #4 of 12 (permalink) Old 06-21-2012, 11:12 PM
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let me know what you come up with. i have the same problem with mine. i adjusted the air fuel mixture screws and it didn't fix the problem. everything is tight and nothing is damaged. not sure what the problem is either

- 1998 Vulcan 750
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post #5 of 12 (permalink) Old 06-22-2012, 01:42 AM
Crap, I WAS in 5th gear.
 
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Check your coasting enrichers.
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post #6 of 12 (permalink) Old 06-22-2012, 01:50 AM Thread Starter
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Check them for what?

'95 Vulcan 750 - Purchased 8/2003 w/ 21,124 miles - passed 50K 9/3/15
* VN900 seat * Daytona handlebar * Converted ACCTs to MCCTs * Relocated R/R * Drilled clutch basket * Coastered * Repainted *
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post #7 of 12 (permalink) Old 06-22-2012, 08:07 AM
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Quote:
Originally Posted by DaveT319 View Post
Check them for what?
Tiny Elves.

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post #8 of 12 (permalink) Old 06-22-2012, 09:14 AM
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Quote:
Originally Posted by thtanner View Post
Mine drops pretty fast. It could be somewhat lean causing it to be slow on deceleration.

Mine was hanging up a bit, but I am not sure what I did to fix it. I retightened all the boot clamps, etc.

Make sure you have no cracks in the carb boots, or airbox. Make sure the air filters are in good condition, etc.
TH didn't yours get better after you did the work on the T connection for the petcock??
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post #9 of 12 (permalink) Old 06-22-2012, 10:35 AM
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are the carburetors synchronized?
If your air/fuel screws are too lean it will be slow to drop RPM's.

I had similar issue and it turned out that the sync was off and the front carb was set too lean.

as mentioned above....check for air leaks in the vacuum system and carb boots...and chase away the tiny elves
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post #10 of 12 (permalink) Old 06-22-2012, 05:11 PM
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Try to turn your idle adjuster (black knob on left side) counter clockwise a little at a time then rev...does it go back to idle quicker or still hang? If its set to far clockwise on mine it will do the same thing and drop rpms slowly.

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