ignition systems

 Pull up a chair, and have Shirley serve you your favorite on my tab.

Me and a friend left last Wednesday heading for North Carolina. Made plans
on hitting the Wheels Through Time museum, and then traveling the Blue Ridge
Parkway north to D C for Rolling Thunder. In Tennessee, my rear cylinder
started cutting out. Would run, then stop, then run, then stop. If I let the
bike sit a while, it would then run for a while. The longer it sat, the
longer it would run before f***ing up. Long story short, limped into
Asheville NC. Shop there swapped out coil, then tried it. Same thing. I have
a Crane HighFire in there. Wrench called Crane, and they asked him how old
it was. He tells 'em five years, and they said Yup, its the module. He nosed
around, and got a Dyna S ignition from the local stealer, put it in, and I
made it home (with other and sundry adventures, but that's another tale).

Two questions for the assembled Wise Ones:

Is the Dyna S a single-fire system?

And #2, did I have a bummer, or do Crane modules only last five years?

Thanks, and now I'll have a 'Bucca


--
DaPlumba

1969 Honda Superhawk ...  the learner
1971 Norton Commando.. I was young, and damn it was fun
1979 Ironhead XLCH...... once the ride, now the project
1994 FXRS..................... my mistress

 DaPlumba wrote:


In my experience, the Crane modules that live in the nose cone are
subject to gradual, and sometimes not so very gradual, deterioration
from heat/vibration.  In the two that I've run, five years' worth of
life is on the long end of the lifespan.

I try not to run internal modules any more because of that.
--

Spunky Hussein Tuna
radical ChristoIslamic fundamentalist Pescasupremacist...
but not at all bitter

 DaPlumba wrote:

  Pretty sure it was a Dyna-S that I had in the Shovel , and it was wasted
spark . I seem to recall hearing of a single fire model too , so it could go
either way . Pull both plugs , ground the bases (with coil leads on them ,
of coarse) and turn the motor over . If they both spark at the same time ,
it's wasted . If they alternate it's single fire .
--
Snag
'90 Ultra "Strider"
'39 WLDD "Popcycle"
Buncha cars and a truck

 

Another way to tell is,
a single fire only has two wires from the coil to the module,
a dual fire has 3 wires from the module to the coil and a dual coil
will have 3 primary terminals.

You can use a dual fire coil on a single ignition by tying the front &
rear negative leads together but that will drop the ohms down very low
and may smoke the module.
--
Ryder Rick

 wrote:


I've got one in my wife's Superglide and one in my Shovel.  The one in
the Superglide is dual fire, the one in the shovel is single fire.  
I've had my bike 6 years and she's had the S/G for 7 with no problems
except she had a coil go out about 3 years ago.
--
Old Crow
'82 FLTC(P)
'87 FLTC
'95 Wrangler YJ
BS#132, TOMKAT, SENS, SLOB#13
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