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The pertronix unit is not that durable. Leave the key on for a few minutes without the engine running and the Pertronix unit will burn out. Major design flaw.
The pertronix unit only replaces the contact points to trigger the coil. But the trigger mechanism in the pertronix unit does not do a good job at the higher rpm pulses needed for a 2 stroke (twice the frequency of a 4 stroke).
What a 2 stroke really needs is a hotter spark. This can be achieved by a better coil (what Saab used in the later 2 strokes) or a different type of ignition, like Capacitive Discharge like the Trionic IDM. With a CDI ignition the coil is triggered by a transistor that is switched on and off by a very low current across the ignition points, thus making them last much longer. The transistor switches a capacitor that supplies a very high voltage to the coil, resulting in a much hotter spark. This ignition system requires really good secondary ignition components (cap, rotor, plug wires and plugs.)
In my own 2 stroke cars I use a Delta Mark 10 CD unit that was made in the early 70's as an add on ignition box. They work really well but their one flaw is the same as the Saab IDM - they fail like a burnt out light bulb. I have never had a Mark 10 fail but I don't drive that much (5k a year? )
The ignition points last much longer. The only issue is the timing inaccuracy caused by the distributor drive gears and advance mechanisms. A crank trigger would be ideal, but ignition points are super simple to make functional.
As far as setting the timing -- you should always use a timing light, it is the only way you can see how much timing variation you have.
In regards to the throttle shaft -- a bushing can be machined and installed to correct this, it is not cheap to do. Much simpler to just find another carb set.
What are your reasons for wanting a Pertronix? Do you have driveabilty issues ?
Good Luck!
posted by 97.123.166...
, Wed, 26 Jan 2022 18:20:19, Wed, 26 Jan 2022 18:29:40, Wed, 9 Feb 2022 04:06:44, Thu, 17 Feb 2022 11:39:18, Thu, 24 Feb 2022 12:30:30
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