56610-52 Carb Control Coil Clamp Screw

Production K Models

56610-52 Carb Control Coil Clamp Screw

Postby starcain » Fri Aug 10, 2018 11:58 am

Recently there has been some discussion among a few of us about the 56610-52 carburetor control coil clamp screw. There seems to be some confusion as to what this screw actually is. Once again the parts book is misleading. It calls it a screw and the illustration almost makes it look like a slot head. What we believe to be the correct fastener is actually a 1/4"-20 shoulder bolt with a 7/16" head. Dimensions in pic. If anyone has information that the bolt pictured is not the correct one please post it.
The picture of the motor is out of the 1954 KH sales folder and pretty clearly shows the shoulder bolt.
Stan
Attachments
56610-52 Shoulder Bolt (800x600).jpg
56610-52 Shoulder Bolt (800x600).jpg (76.35 KiB) Viewed 12393 times
56610-52 & Clip (8x6).jpg
56610-52 & Clip (8x6).jpg (148.12 KiB) Viewed 12393 times
Throttle Cable Clip Shoulder Bolt 56610 (a).jpg
Throttle Cable Clip Shoulder Bolt 56610 (a).jpg (339.52 KiB) Viewed 12393 times
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Re: 56610-52 Carb Control Coil Clamp Screw

Postby JerrryR » Fri Aug 10, 2018 2:42 pm

Thanks for the info Stan. On a side note did you notice the factory photo shows a steel gas line. I checked the pictures of Jim Gs' OP 54 and it also has the steel fuel line. From this I am starting to think that it was a running change in 54 to the rubber gas line?
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Re: 56610-52 Carb Control Coil Clamp Screw

Postby starcain » Fri Aug 10, 2018 3:03 pm

The HD-20061 factory photo of the 1954 KH along with the 1954 Enthusiast announcement issue both show the steel gas line. I looked at my notes from the 1954 KH museum bike and it had the rubber gas line. It also has the thick horn cover on it so I'm starting to wonder about that bike being an early 1954 example. I believe the horn cover and the gas line were both running changes in 1954.
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Re: 56610-52 Carb Control Coil Clamp Screw

Postby Mutt » Fri Aug 10, 2018 3:44 pm

I saw a Knucklehead at the H-D museum and there was LOTS of stuff incorrect on it..............
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Re: 56610-52 Carb Control Coil Clamp Screw

Postby chuckthebeatertruck » Fri Aug 10, 2018 5:25 pm

The HD Museum bikes are a mix of pre-production, production, and restored or purchased "original" bikes. As such, some are more accurate than others -- especially for pre-war bikes.

I know I've stared at a few of them recognizing immediately what isn't quite "right"

However, literature at the Museum makes it sound like all the models on display were pulled right off the assembly line and preserved for posterity. It's true that many were taken from the line (or rejected because of some flaw) . . .but you have to dig deeper to find out whether you're truly looking at an original machine or a restored machine. They aren't always forthcoming. And, like all things, any particular machine represents a snapshot and we all know about running model year changes.

The other thing to keep in mind is that the HD museum is a FOR PROFIT museum. Their mission isn't originality -- their mission is promotion of Harley's heritage as a way to keep you connected to their products and hopefully buying a new HD. It can cause them to make "interesting" decisions about what goes on display.

For example, they recently wrapped up a "Race of Gentleman" photo show featuring snaps from the last few TROGs. Not exactly "history" or HD specific or even something that needs professional interpretation -- but certainly motivating for buyers who fancy their new sporty a way back machine.
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Re: 56610-52 Carb Control Coil Clamp Screw

Postby thefrenchowl » Fri Aug 10, 2018 6:27 pm

Any screws at H-D that has got a proper part number like 56610-52 was made in house, ie had an in house drawing, ie machined, ie special, ie is not a std screw bought in from a supplier's catalogue...

Patrick
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Re: 56610-52 Carb Control Coil Clamp Screw

Postby EKHKHK56 » Tue Aug 14, 2018 6:30 am

Yes I noticed many small parts, special fasteners that look hand turned from basic materials. The Nut welded to the Rear Axle end caught my attention first many years ago..Erik
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Re: 56610-52 Carb Control Coil Clamp Screw

Postby hennesse » Tue Aug 14, 2018 9:29 am

starcain wrote:the 1954 KH museum bike ... I'm starting to wonder about that bike being an early 1954 example.


A few issues back, the AMCA magazine had an article about the Archives - with an interview with Bill Rodencal. In the article, he mentioned that the 1954 KH did not have any engine internals. I can't remember exactly what he said, but something like "We had original examples of most every year and model, but some we just didn't. So we had to go buy them".

If you only own a few antique bikes, you can take great pains to make each one totally correct. If you have thousands of them...
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