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Carbs and Fuel System
From the gas tank to the carbs
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post #1 of 5 (permalink) Old 04-21-2012, 10:55 AM Thread Starter
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Red face Petcock

This is a stupid question but if I don't ask I won't know. What position is off for the petcock on my 86 VN750?
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post #2 of 5 (permalink) Old 04-21-2012, 12:23 PM
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You may not have an Off position. I believe the first few model years had On, Prime and Reserve. Later they dropped the Prime and added Off.

I'm keepin' all the left over parts. I'm gonna use 'em to build another bike!
_____________________________________________
"Black Beauty"
1989 VN750 acquired December, 2008, 6,711 miles
Currently 23,298 miles

Old Blue
2001 Honda CMX250 Rebel acquired July, 2008

1987 VN750 project bike, acquired August, 2009, 33,000 miles and balancer sticking out of the case, currently awaiting attention and parts
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post #3 of 5 (permalink) Old 04-21-2012, 07:06 PM
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flite is right, no OFF on models from 1985 to `88 IIRC.
No vaccuum to the middle nipple is an automatic OFF whenever the engine is not running.

The only time this might be a problem is if the petcock diaphram become brittle/worn/torn and starts to leak. Others report it can leak through the carb and fill the crankcase. Doesn`t seem to happen very often though.

Gordon

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

H-D windshield
Relocated R/R
MF-AGM battery
Fiamm Freeway Blaster horns
F&S luggage rack and engine guard
Kury Offset Hiway pegs
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
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post #4 of 5 (permalink) Old 04-22-2012, 07:46 PM
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Mine clanks like a bad lifter on a car. With a low tank its even louder. took me a while to figure where the noise was coming from. Gonna replace inards soon
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post #5 of 5 (permalink) Old 04-22-2012, 09:15 PM
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I went through 2 petcocks and ended up purchasing and installing a PINGLE Fuel Valve.

1986 Black Kawasaki Vulcan VN750 "Black KAWK"
VN750 #9300 & VROC #33453

EMGO Handlebar, V&H Exhaust, Drop Shocks, Raised/Painted Fork, MeanStreak Seat, Tank Bib, ME880 Oversize Tires, Engine Guard, Custom Mirrors, Chris Products Turn Signals, Ear Shave, 150/42 Jets, PINGEL Fuel Valve, MCCT, Volt Meter, Shendegen R/R, AGM Battery, Coastered, .020 Coils, Relo Gauges & Headlamp, SilverStar Ultra, LED Flashing Brake Light, Center Stand Delete, WOLO Airhorn.
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