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Discussion Starter #1
Question for you, Steve -

I'm suspicious of the funky old coils on this 450 project of mine.
I'm going to order a couple of the XS650 replacements from Mike's XS place.
Also getting new wires and caps - question is, do I need the resistor caps, or the non-resistor caps??
 

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Sensei
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Resistor caps (or wires) are simply to reduce static discharge in nearby radios.... The stranded copper or steel wires will fire cleaner, and non-resistor caps will promote a hotter spark as well.... (think "hot rod")....
 

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Which style of cap should a guy use if going with an old Prestolite Electronic Ignition on a 74 450? I've heard talk of only using resistor caps, but I'm not sure?? I was planning on picking up some Dynatek or Accel 3 ohm coils to match the ignition, but again I'm not entirely sure if it's necessary?? Any other tips or tricks?

Any thoughts guys? I'd appreciate it. ;)

P.S. Sorry to threadjack here Bill...

GB :mrgreen:
 

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Sensei
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An electronic ignition usually has different component requirements than the stock points set-up, mostly dictated by its internal circuitry..... For instance, you are going to be using 3 ohm coils, whereas the E-ignition I am modifying/trying to modify for the little 90 cc uses a .03 ohm coil....... A factor difference of one hundred!......
I am NOT familiar with the prestolite version, but recommend you follow the manufacturers specs as closely as possible.... I'm sure there are specs available about your system SOMEWHERE online..... Hopefully (Maybe) someone here has experience with them...
Steve
 

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They were sold as an aftermarket accessory back in the day. I just happened to find one for the 450, new in it's original box, plus if that fails I've always got the Dyna. The Prestolite is made for the 450 though so it's a "bolt on" when compared to the Dyna. I really did'nt want to modify/retrofit the Dyna unless completely necessary.

The thing is with the Prestolite, it does'nt say anything about coils in the original instruction booklet. I suppose since it's a vintage part, that I'll run it with the stock coils to start with.

GB :mrgreen:
 

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GB, That sounds like a reasonable assumption, but I'd give it a week or so, so someone can volunteer any info they have on the subject....Meanwhile, the VJMC and VJMOG may be able to answer this as well.... Seems to me we ran stock coils on the Goldwing units, but they were Dynas..... Steve
 
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does anybody here have info on using the xs400 e-ign on one of these honda twins? I would say stock coils are probably a safe bet unless prestolite also made a coil upgrade.
 

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Sensei
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I originated the idea and prototype while over on the 450DOHC site..... We did get it working , but some modding is required, and it's not perfect (different advance curve).... If you want specifics, I can provide the links or answers..... Feel free to e-mail me direct at [email protected] .... Steve
 
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