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TOPIC: '64 Cyclone

'64 Cyclone 5 years 9 months ago #1311

  • gstridr
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My current project is a '64 A50 Cyclone. I must admit that it was missing much and in the process of restore I have encountered difficulty in figuring out the switching in the headlamp shell. BSA evidently used the Lucas MC66 small headlight bucket for this year only, then went to the elongated Lighting bucket for '65. Unfortunately, I have not been able to determine what the layout or the types of switches that were incorporated in the 5 3/4" shell. If there was no Lucas ignition switch in the bucket either, then where might it have been?

I know that OV raffled off '64 Cyclones in 2007 & 2014, and I am hoping that anyone involved might be able to guide me in the right direction so that my restore can be accurately completed.

I'll also post this in the Technical Forum in case one might be reading one or the other. Many thanks in advance for any help that comes my way.

Doug Giffin
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'64 Cyclone 5 years 9 months ago #1319

  • Rich B
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The dual carb twins of 64/65 can be a bit of a challenge to figure out what is correct or incorrect for a given bike. There were a lot of variation in those 2 years. Here is my take on the switches. It may or may not be accurate.

Info I am using is from parts book 5118.

Strange thing, the parts book doesn't even list the small shell. Just the 2 versions of the large shell. But it does list the switches.....strange since I know the switches won't fit the large shell.

Light switch is Lucas P/N 31620, the rotary light switch more commonly found on the wet frame bikes. The dip switch is Lucas P/N 31306, this is a push button switch with all of its working bits fully exposed on the back side.

Somehow, I have accumulated a couple of those headlamp shells with switches. They do show up at swap meets and fleaBay. They were used on a number of singles and twins that were dirt oriented.
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'64 Cyclone 5 years 9 months ago #1321

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Rich,

Many thanks for the reply. I to, am using parts catalog 5118 and have found it confusing from time to time, especially regarding electrics.

The book lists p/n 19-8352 as the dipper switch with a Lucas number of 31620 and a light switch p/n 19-8351 with a Lucas number of 31306. Neither of these appear to be of the socket connect types as were used on the Lightning, which also eliminates the listed wiring harness with socket connectors for ignition and lights.

My confusion follows: using the socket connector switches and harness I doubt whether there would be close to enough room in the 5 3/4" bucket; using the aforementioned non-socket switches, what wiring harness might be needed; and if the 31620 and 31306 switches are used, then where might the ignition switch be located.

On a side note, I have attempted to locate 31306 (19-8351) with no sucess. British Only lists the part, however, the picture is of the standard blade type light switch.

I am hopeful of a solution to the conundrum as I should have the frame back from paint in a few weeks and will be ready for re-assembly.

Thanks again for your info.
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'64 Cyclone 5 years 9 months ago #1322

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Neither of those switches are for a socket type harness. Both use wires inserted into a terminal with a set screw to retain the wire.

I do not think a 64 Cyclone would use an ignition switch at all with ET ignition. A kill button is as good as it got.

There have been some Hornet harnesses on fleaBay of late. IMO that would be correct for a 64 Cyclone. Or at least close enough. 1 year models can be tough to get the exact bits.......
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'64 Cyclone 5 years 9 months ago #1323

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Rich – thanks again for the input. Are you of the opinion that both the road model and the competition model used an Energy Transfer system? I know that both models were available in ’64 (at least in the U.S. market).

You mentioned that you’d accumulated a few buckets with these switches. Would you have a salvageable 31306 and might you sell it to me?

By any chance, were you involved with the 2007 or 2014 Cyclone raffle bikes?

Thanks, again.
1964SalesBrochure.jpg
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'64 Cyclone 5 years 9 months ago #1328

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i would have to sit and look at parts list and schematics to give my best opinion. Just a gut feeling, the road model would have been more like the other dual carb road bike electrical system. Rectifier, 88SA switches, and that strange coil switching for regulation.

The competition oriented Cyclone would have been ET ignition like the Hornet.

I have 2 buckets with switches and 2 bikes for the bucket and switches. I wish I had a few more, makes for a dirt simple head light install. Would have been nice for a Bultaco project.

There was a switch on fleaBay very recently. It was mixed in with a lot of other pieces in a package deal. I know that switch was used on Enduro Stars, Some Victors, and a number of Triumphs. So they do exist. One will show up.
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