any feedback on these coils?

[cyclon36]

Found this on ebay: http://cgi.ebay.com/ebaymotors/Honda-30 ... 500wt_1182

Ohio Cycle sells NOS for around $90 each so this seems like a good deal. Not sure what brand the OEM coils were though or if having two rights is really a non issue. Feedback? Please don't steal them from me if it is a good deal :D

[teazer]

AFAIK, the coils are the same left and right. The difference is the bracket - one is designed to take the condensors.

[e3steve]

Teazer is spot-on; the coils themselves aren't handed.

[cyclon36]

Thanks for the info. All my brackets are in good shape so that doesn't worry me. I want to put new coils in though b/c there was some home made fixes done to mine that ruined the caps. Any feedback on the bridgestone coils in general? Is a coil a coil or are we running into odd issues from brand to brand?

[e3steve]

Thanks for the info. All my brackets are in good shape so that doesn't worry me. I want to put new coils in though b/c there was some home made fixes done to mine that ruined the caps. Any feedback on the bridgestone coils in general? Is a coil a coil or are we running into odd issues from brand to brand?

Yes, in truth (and physical differences aside), a coil is a coil is a coil. Although one from a Type-2 (dual HT) is unsuitable.

Those Bridgestone coils should do the job perfectly.

There are different types of coil out there, electrically speaking, that will produce varying impedance (resistance) reading to suit different types of ignition system but, essentially, any 12V coil of a suitable physical size and with +ve (supply) and -ve (Low Tension) connections will work. Here's a brief testing tutorial, and this Wiki topic is very informative.

This webpage contains a very clever and interactive practical schematic! The 'knife switch' in the demonstration module there is shown as being in the positive line of the circuit; for the purposes of our bikes and all modern, post-1960s vehicles you should imagine that the polarity of their battery is reversed and place an ignition switch in the then-imaginary positive line. IOW, negative ground (earth) return.

[Hotshoe]

Your diagram may have provided me with one of those "Ah Hah!" moments Steve.
I've never really understood why/how a coil provides spark when the points break, that always seemed counter-intuitive to me.
So basically, the condenser acts as the capacitor storing the electricity until the points break letting the current flow through the coils where it's magnified and supplied to the plugs?

[brewsky]

Good links, Steve.
Now how does an AC supplied coil/points setup work (no battery/no rectifier)?
Can't seem to get that thru my thick skull!