1983 KZ1000P bobber build ... MUTT #3

One more pic with tank mounted

The coils should be bolted to a frame member or tab. Heat sync.
Steve

Hmm you'd think if it's using the Frame as a heat sync, there'd be more of it touching the frame than just two standoffs. They're currently in an area where it should get good airflow over them when on the move ... will def. keep a watch for excess heat buildup. There's plenty of space there for the stock brackets to be mounted side by side too.

They should be bolted to something solid. The center core dissipates the heat, plus the coils work better this way.
Steve

My understanding is that an ignition coil remains equally functional even if suspended in mid-air, and doesn't require a heat sync.

However, I vaguely recall that KZr member loudhvx has posted information about how securing the coil in the factory manner whereby the core is conductive to the bike frame does serve to slightly improve the function of the coil.
But I don't recall the specifics, or maybe didn't comprehend or absorb the electronic mysteries involved as to how securing of the coil has any effect on collapse of the magnetic field causing high tension voltage throughout the secondary loop.










Coil charges while primary winding is grounded through the points or electronic ignition.

Coil fires when primary wiring becomes ungrounded .


Good Fortune!

Well I would expect the coil to need to be grounded for the above reasons, but the heat dissipation I see as secondary.

The bike did run fine idling while I had the coils just hanging off of the wiring harness.

I fried some coils that way. Tar started coming out of one of them. I fasten them solidly now.
Steve

Battery box/bracket done today. Now to start mounting the electronic bits

Are you sure the battery will work on it's side?
Steve

swest wrote: Are you sure the battery will work on it's side?
Steve

Yes it's a splillproof AGM battery for powersports, and was recommended by the battery store.

One more update. Welded on some brackets for the ignitor, rectifier and rear brake resorvior. Now to start wiring!

Not much happening except some wiring. Bought a project box from RadioShack and am stuffing it with all the electrical stuff I can get in there. Then I'll mount it to the front of the battery bracket.