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post #1 of 5 (permalink) Old 03-24-2010, 09:45 PM Thread Starter
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Hello from beautiful L.A. (lower Alabama)

Just finished going through an 82 Goldwing when my nephew brought an 85 Vulcan vn700 that had been given Him. The P.O. had made a mess of the wiring and the battery box was gone. The P.O. rode the bike to my nephews yard and could not get to restart. There it sat until it was brought to me. He tried to fix the problem but was limited in ability. I got another harness and box from e-bay and spent the day installing said items. Found a shop manual and parts and wiring diagrams in PDF format on the net so I thought I was set. Well the wiring seems to be right but I have no spark. Motor turns over fine and a compression is 140 in both cylinders. I could not find any markings for + or - on the coils so I hooked them up any way. I thought I would first check the safety switches first but ran out of daylight. Tomorrow I will start testing. All bikes have their special problems and I noticed that the rectifier connections were damaged on both the old and replacement harness were damaged. Is there something problematic that I should check first? I have found that users groups are the best place to start. Thanks, Cosmo
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post #2 of 5 (permalink) Old 03-24-2010, 09:53 PM
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Welcome to the forum. You've come to the right place, lots of knowledgeable folks here. I'll just comment on the connector damage. The stock location for the r/r is underneath the wet cell stock battery (and above the heat producing "goat's belly") and since they tend to leak, many of the connectors are corroded by acid. That is why relocating the r/r and installing an AGM battery are recommended here. Installing iridium plugs helps with both hot and cold starts.

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 03-25-2010, 02:57 AM
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Location: Lethbridge, Alberta, Canada
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Welcome to the Vulcan madness Cosmotg, from Northern LA, (Lethbridge, Alberta).

If the vn still has a stock exhaust system, relocate the R/R from the oven like temps above the belly of the goat and under the battery box, to the frame by the left passenger footpeg. If the connectors and wires are cooked or corroded, check to see if you can cut off the brittle wire and still have enough length to reach the relocated r/r with new connectors.

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

Last edited by OlHossCanada; 03-25-2010 at 03:00 AM.
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post #4 of 5 (permalink) Old 03-25-2010, 09:25 AM
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Check the frame under the battery for acid damage too.

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 #5 of 5 (permalink) Old 03-28-2010, 03:59 PM
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Join Date: Feb 2010
Location: Essex
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Welcom to the forum.

As you say all bikes have their own set of problems and the VN750 is no exception. Luckily for you and me there is no shortage of knowledgable types around here to help sort them out.

Mine is a Red one.
Colour matched Bungee straps
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