86 VN750 No spark in the back Cylender

hi i have spark in the back 2 spark plugs for only a min or 2 when i
first start my bike

then the spark goes away, i put new sparkplugs, wires and also
switchen the coil packs from the front to the back and still nonthing

The front is A ok

1986 VN750 2cylender 2 spark plugs per cylender

any ideas

 

I suspect your problem is just loose connections. The female spade
terminals on the coils have to be clean, corrosion free, and they have
to be tight. Maybe you just need to carefully squeeze the female spades
a little tighter with a pair of pliers. Also, check the wire where it
is crimped into the rear of the spade terminal. Crimping is a fast,
cheap way to hook terminals onto a wire. It takes less time and money
than soldering. But corrosion will eat up the copper wire inside the
insulation and you can't tell what's going on unless you start wiggling
wires where they crimp into the terminals...

Go to www.partsfish.com and register so you can look at the parts
fiches for your motorbike. Select the Kawasaki motorcycle link and it
will lead you the the whole list of Kawasaki models. Click on the
VN-750 link, then on the next page select the year of your bike. When
you get to the 750 Vulcan page, select IGNITION...

59026 COIL-PULSING is the two signal generator pickup coils. You might
try
swapping the two pickup coils and see if the symptom goes to the front
cylinder. Also, very carefully demate the plastic connector on the end
of the wire harness leading to the two pickup coils. Look for corroded
spade terminals and corroded female terminals in the two plastic plugs.


Also, check the connectors on the 21119 IGNITER ignitor box itself.
They might have loose or corroded terminals. The igniter box is solid
state, it usually either works or it doesn't. There is rarely any
"in-between" that you can blame on the solid state components inside...

There is some stuff called Tarn-X that I use use to clean off corrosion
on connector pins, but it's a little rough on them, it takes off the
plating on the pins leaving just the bare copper. A guy on an e-mail
list told me about some stuff called DeoxIT Power Booster.

 

On 4 Jul 2005 13:12:06 -0700, "krusty kritter"

snip

DeoxIT is good shit. Have been using the same little bottle-with-brush
for 10+ years on aircraft/avionics connectors.

They've changed the names of the different products over the years, I
haven't quite kept up. The higher percentage solution is good for
"low-tech" connections, the lower percentage solution is the stuff to
use on the gold-plated electronic connections.

I don't work/pimp for the company, just have used their goods to
successfully fix a lot of flakey electrical/elecronic systems.

TC