High RPM MISS - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Electrical
Where does this wire go?
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post #1 of 9 (permalink) Old 08-15-2008, 09:38 AM Thread Starter
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High RPM MISS

After resetting pickups,adding cobra slash pipes,rejetting still have a miss at High RPMs..(7500 / 7800)( Not running out of fuel.) Plugs were only a few thousand miles but changed them anyways. were a little lean then rejetted to 142, now a little rich. Wires were changed also. Last winter I took apart All wiring connections, cleaned ,rebent and back together. Now there was no miss before I had done all of these items. I had twisted her at 10,000 rpms when all stock parts were on..Looking for a fix. Coils check out ok. Amsoil man

Marbled
Pick ups reset
Splines lubed
Kenda Kruz tires 110Frt. / 170 rear
Custom saddle seat
Backrest
1500 classic rear fender
Cobra slants /Custom Made turndowns
Diamond Plate Buffalo Leather Bags
Throttle lock
Front bearings repacked
Front shock oil replaced
Led bulbs
Amp meter
Running Boards
Dial A Jet Carb settings
Gremlin Bell (front mount)
Fully Lubed with Amsoil Lubricants
Trailer hitch / Hidden




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post #2 of 9 (permalink) Old 08-18-2008, 10:54 AM
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How old is your battery?

Glenn

1985 VN700
Saddle Bags
Small Sport Windshield
R/R moved
Home built coasters
Kaw touring front fender
1990 Fuel tank
Kenda Kruz 110/90-19 & 170/80-15 tires
NGK Iridium plugs
NGK plug caps and 7mm copper core wires.
Deer Whistles

My VN700 pic's

VROC #7740
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post #3 of 9 (permalink) Old 08-21-2008, 08:43 AM Thread Starter
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Miss

Glenn: Like new, last fall and its a jell. Guage shows its all up to par and even put a second meter on to check..Nope Not Batt..Thanks for responding. This must be tougher then forum can handle.. No responses..Looking for answers as everyelse in this forum does. Amsoil Man

Marbled
Pick ups reset
Splines lubed
Kenda Kruz tires 110Frt. / 170 rear
Custom saddle seat
Backrest
1500 classic rear fender
Cobra slants /Custom Made turndowns
Diamond Plate Buffalo Leather Bags
Throttle lock
Front bearings repacked
Front shock oil replaced
Led bulbs
Amp meter
Running Boards
Dial A Jet Carb settings
Gremlin Bell (front mount)
Fully Lubed with Amsoil Lubricants
Trailer hitch / Hidden




Your Local AMSOIL Connection! Cell#989-329-1225
Amsoil Man is offline  
 
post #4 of 9 (permalink) Old 08-21-2008, 09:51 AM
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Have you checked/cleaned the air filters?
How about carb float level?


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


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Aim for the apex."

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post #5 of 9 (permalink) Old 08-21-2008, 11:35 AM
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The carb vent line; the one that tee's off between the two carbs, needs to be in place in the holder on the back of the air box. If it's exposed, or leaking, and blast of "at speed" air into it will cause a miss/stumble.

You've been here long enough to have likely heard the end of it needs to be cut at an angle before inserting into the holder, so it doesn't plug itself off. But I'm mentioning it anyway, for new folks, lurkers, etc.
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post #6 of 9 (permalink) Old 08-22-2008, 04:04 PM Thread Starter
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Hyper: Yes I have new filters. Does the same with or without filters on. Float levers have not been changed as I have the issue in all gears at same RPM.
Doug: Yes carb vent was one of the first things I had taken care of. I had set the pickups at same time also as I might have to pull cover and recheck the settings.. I had no issues untill the fixes and changes.??? Yup me too??? Ill do pickups this weekend and get back with all interested..Amsoil man

Marbled
Pick ups reset
Splines lubed
Kenda Kruz tires 110Frt. / 170 rear
Custom saddle seat
Backrest
1500 classic rear fender
Cobra slants /Custom Made turndowns
Diamond Plate Buffalo Leather Bags
Throttle lock
Front bearings repacked
Front shock oil replaced
Led bulbs
Amp meter
Running Boards
Dial A Jet Carb settings
Gremlin Bell (front mount)
Fully Lubed with Amsoil Lubricants
Trailer hitch / Hidden




Your Local AMSOIL Connection! Cell#989-329-1225
Amsoil Man is offline  
post #7 of 9 (permalink) Old 08-22-2008, 04:17 PM
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Steve
Try this, unhook your vent line and "T" from the two vent lines coming out of the carbs, just leaving the two short hoses. Take it for a run and see what happens.

Glenn

1985 VN700
Saddle Bags
Small Sport Windshield
R/R moved
Home built coasters
Kaw touring front fender
1990 Fuel tank
Kenda Kruz 110/90-19 & 170/80-15 tires
NGK Iridium plugs
NGK plug caps and 7mm copper core wires.
Deer Whistles

My VN700 pic's

VROC #7740
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post #8 of 9 (permalink) Old 08-22-2008, 11:36 PM
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I was having a similar problem, and it turned out to be a hairline crack in the vacuum line from the petcock to the carb. Something to check I guess.

Chris
Wayne, NJ
1989 VN750-A5
VROC #27781
-Replaced/Fused Stator & Replaced/Relocated R/R (15K mi.)
-MF Battery
-De-Goated/Re-goated
-Coastered
-Splines Lubed
-Stebel Nautilus Horn
-AutoMeter 2" VOM
-Silverstar Headlight
-Refinished Gauge Rings and Mirrors(Flat Black)
-Refinished Swingarm/Lubed Pivots
-K&S Turn Signals Clear Cover/Amber Bulb
-Kenda Kruz 110/90-19 front 170/80-15 rear
-Clear Alternatives LED tail light
-Plexifairing III
-Willie & Max Saddlebags and SissyBar Bag
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post #9 of 9 (permalink) Old 09-08-2008, 07:38 PM Thread Starter
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I finally had a chance to reset coil pickups. Yes they were off . Runs a bit smoother but ya there is always a but, still have miss.. Ill check vacuume line tomorrow as business and weather this past week put me behinder then I was. I had replaced line last winter as I had replaced all lines.Next will be disconnect lines as Glenn mentenioned. Thanks for all your responses..Amsoil man

Marbled
Pick ups reset
Splines lubed
Kenda Kruz tires 110Frt. / 170 rear
Custom saddle seat
Backrest
1500 classic rear fender
Cobra slants /Custom Made turndowns
Diamond Plate Buffalo Leather Bags
Throttle lock
Front bearings repacked
Front shock oil replaced
Led bulbs
Amp meter
Running Boards
Dial A Jet Carb settings
Gremlin Bell (front mount)
Fully Lubed with Amsoil Lubricants
Trailer hitch / Hidden




Your Local AMSOIL Connection! Cell#989-329-1225
Amsoil Man is offline  
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