got a good one, who can figure it out? - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Electrical
Where does this wire go?
Includes Electrical mods, Lights, Stator,
Rectifier, Diagrams, etc

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post #1 of 38 (permalink) Old 04-06-2015, 08:50 PM Thread Starter
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got a good one, who can figure it out?

Thanks to everyone for their contributions to the knowledge here I've got the bike running fairly well for an old girl. around town and less than 60 mph is nearly flawless operation. the power is improved at all rpms but let me start from the beginning. my wife rode this bike for two years and we never did much to it since buying it she said it had issues at highway speed. I did the fuel cap cleaning for poogs and she said there was some improvement. we also gapped and checked plugs and did some seafoam. mild improvements she said. I got the bike and my analysis was there was a bog at 4500-5500 rpm and as long as I got above that quickly and shifted to 5th I could go just fine from 65-85mph. and I continued the sea foam the bog got better but not completely gone.

this fall I pulled the carbs and cleaned and checked everything and replaced the vac petcock with a tw200. the power increase was immediate and noticeable and no bog so I thought everything was great, however after beating the bike through a few corners it begins to hesitate and on the highway it will go fine right to 75 but then after 60-80 seconds begins to miss and lose power and cant maintain 55 barely down shifting does nothing and opening the gas cap does nothing

I have so far:
cleaned the carbs
replaced petcock
cleaned the tank vent
checked the bowl vents (45 deg, in right ear)
cleaned air filters
checked carb boots (had a slight leak gone now no change)
replaced plugs
checked coil wires
checked grounds
checked battery connections
cleaned ignition contacts
wiggled key and turned on/off no change
rode with tank open

when it occurs it will cut in and out and have full power for a split second, almost causing a buck, rolling off and on the throttle doesn't help. it sounds like a dead cylinder or a decel almost.

even though I have cleaned the tank vent and it seems to flow, when I open the cap, I hear a hiss briefly, like it is sucking in air, but I don't think its related because the problem is present when the cap is open and if I ride her gently around at 35-45 mph she goes great with no apparent problem for many miles and the tank vents fine. this may be electrical but it could be a carb issue I will post in both maybe?? thanks for any insights guys!
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post #2 of 38 (permalink) Old 04-06-2015, 09:33 PM
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if yuo still have the ears check this! https://www.vn750.com/forum/showthread.php?t=57369

1986 vn 750 aka "Huck Farley"
42,000 miles
Rick's stator and rr
Tuxedo stator cover mod
pickup coil mod
dampers replaced
agm m/f battery
Harley sportster exhaust, degoated
Hid conversion
splines lubed
custom "vn750.com" grill cover
NGK Iridium spark plugs


acct to mcct mod https://www.vn750.com/forum/showthread.php?t=17917

rekeying locks, https://www.vn750.com/forum/showthread.php?t=7309

stator replacement walkthrough, https://www.vn750.com/forum/showthread.php?t=11369
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post #3 of 38 (permalink) Old 04-07-2015, 07:19 AM
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Yep sounds like the carb vent line is flapping in the wind.

2003 vn750
1988 Pontiac Trans Am (project/driver)
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post #4 of 38 (permalink) Old 04-07-2015, 08:16 AM
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Quote:
Originally Posted by M_Angell View Post
Yep sounds like the carb vent line is flapping in the wind.
That's where I was headed too.

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post #5 of 38 (permalink) Old 04-07-2015, 08:38 AM Thread Starter
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yup already checked that, twice, I will triple check I guess, sometimes I'm sure it's fuel and others I swear it's electrical from the way it cuts in and out, in a few seconds it can cut in and out several times, there seems to be full power, but only lasts for a fraction of a second, it feels like the bike is on one cylinder 90% of the time and it seems to come on and go away totally and quickly after beating through a few corners or highway for 1 min or so...
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post #6 of 38 (permalink) Old 04-07-2015, 09:09 AM
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Try to wiggle your key next time. While riding, turn it ever so slightly to the right.

Also, put that carb vent tube on the nipple under your gas tank. It does best there.

If it was electrical, you could tell by the tachometer slamming down to 0rpm
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post #7 of 38 (permalink) Old 04-07-2015, 03:35 PM
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Make sure your ignition PUCK is tight.

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post #8 of 38 (permalink) Old 04-07-2015, 04:50 PM
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Hehe he said puck

ONE RATS ASS GIVEN PER POST
Support your local FREEBIRDS MC
1986/5 Vn700/750 Frankenfook cross eyed bitch "Mellisa Fayhe"
I am a BIKER and i'm proud.FREEBIRDS MC CENTRAL NY

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post #9 of 38 (permalink) Old 04-07-2015, 08:16 PM
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Quote:
Originally Posted by OleDirtyDoc View Post
Hehe he said puck
I said nipple!!!
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post #10 of 38 (permalink) Old 04-07-2015, 08:20 PM
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Quote:
Originally Posted by crowley1027 View Post
I said nipple!!!
What the puck is wrong with me.I didn't catch that

ONE RATS ASS GIVEN PER POST
Support your local FREEBIRDS MC
1986/5 Vn700/750 Frankenfook cross eyed bitch "Mellisa Fayhe"
I am a BIKER and i'm proud.FREEBIRDS MC CENTRAL NY

lowered with progessive 412 10" shocks
rejetted for K/N Pods part#rc 2340
sportster seat

'I didn't lose my mind.i gave it away

BRING BACK WOLFIE."Peace and Carrots"RIP
"And I'm free...as a bird"John Lennon Free as a Bird
"I only carry when I have my pants on"Joe Robinson RIP aka Old Dog
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