Go to the head of the class... great diagnostic work on your part. And yes, 
that is the problem. You could go one step further and swap the pulser inputs 
to be sure. Very low failure rate on those, it might be a possibility to obtain 
used parts safely. 

--- On Mon, 6/1/09, oldschoolgwin <[email protected]> wrote:

From: oldschoolgwin <[email protected]>
Subject: [Nighthawk Lovers] 83 NightHawk 650 no spark on center two cylinders
To: "Nighthawk Motorcycle Lovers!" <[email protected]>
Date: Monday, June 1, 2009, 5:53 PM


Hi, oh my poor Nighthawk.

Well i tried to start up this 83 NH 650 that i bought not running
after 10yrs of stored in garge (allegedly it did not have any issues
when stored dry w/o fuel) and found i have no spake on the the two
center cylinders.

Swapping wires from the ingnition control module to the two coils
shows the (one controls outer cylinders and one the inner cyclinders)
shows the coils are good.  The pulse generators ohm out at the upper
end of teh spec - roughly 360 ohms - so those seem to be ok.

The only thing left is the ignition control module that if the
diagnosis is correct is providing the neccessare inputs to one coil
and not the other.

Does this sound right?

These are pretty expensive - any ideas on where to find one other than
Ebay?

Is there as way to repair these? (I was a reference to someone
replacing the electolytic capacitors in one - but the unit looks
seeled so not sure how to acccess these or even if it is possible.)

Anything else i should check (I've checked all connections and traced
wires for continuity).

Thanks for any help.

Paul







      
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