Ignition Units Cooling

[Larry Zimmer]

Anyone who has had a seat off has noticed those three little things with the fins sitting behind the air inlet to the air filter. Ever wonder why the air inlet is the shape and location it is? That's so that the air inlet can pull cooling air over those three thingys: the ignition pulsar units. At 4200rpm, the air is moving between 25 - 30 mph into the air box through that opening. That's pretty good airflow around the ignition units. Should you decide to go to individual air filters, eliminating the stock filter/intake box and this cooling air flow, consider the type of riding you do and where you might be doing it: hot weather, stop-and-go, long stretches at high speed, etc. Just could be some heartburn. You've heard of problems with the pulsars: the problem is heat. Not saying that changing the air intake is a guaranteed failure. BUT, you might keep it in mind. Nothing helps electrical units like cooling! Alternators, rectifiers, AND, ignition units.

[alimey4u2]

Good point Larry, by pure luck I went with the full Dyna S setup which eliminates the stock ignition unit....

[Larry Zimmer]

And, that will, certainly, work. Also, eliminates any concern about the pulsars. Some day, I'll get over the 'cheaps' and get a Dyna unit, too.

[EMS]

Interesting observation, Larry. But....
On my 81 Prolink the "OKIs" are mounted exactly as you describe, on my 79, however, they are hidden below the battery box. No cooling air flow there. Or at least very little.

[cbxtacy]

and I've seen a lot of early units where the black stuff has just oozed out of them. Never seen any late models though.

[glencbx]

I have two coils that are firing and one that is not.
Can any one HELP.
Glen

[alimey4u2]

Welcome to the site Glen....
Firstly, switch coils to isolate the problem with the possibility of other component/s/wiring...