Harley-Davidson Engines
metal wall sign

Atmospheric | Knucklehead | Panhead | Shovelhead | Milwaukee Eight



Essential lowbrow art for your garage, lounge, hall or ... wherever

Specifications: Steel plate backing. 300mm x 400mm. Printed direct to recycled metal. Original Sump design.


Only 14.99

plus P&P. UK 4.30. EU 6.50. World 11.10


UK P&P 4.30

Royal Mail First Class Recorded Delivery

EU P&P 6.50

Royal Mail Standard International Service


Worldwide P&P 11.10

Royal Mail Standard International Service



Instructions for use:


1. Remove carefully from the packaging.

2. Inspect the sign and feel pleased that you bought it.

3. Find a suitable spot on a suitable wall or door.

4. Position the sign thoughtfully using strips of masking tape if necessary.

5. Carefully mount the sign with nails or screws taking utmost care not to damage any part of the design (Tip: Use fibre washers both in front and behind the sign if you're the particular type or have an obsessive-compulsive tendency).

6. Open a beer, light a fag, hug your partner or favourite pet.

7. Stand back and enjoy the sign and do this as often as time and convenience allows.

8. Drop us an email to let us know how satisfied you are.

9. Wipe the sign occasionally with a soft cloth (and wax it if you're the particular type or have an obsessive-compulsive tendency).

10. Tell your friends.


That's all that's required. The sign should still be fit for purpose long after you're gone, and we hope that's a long time into the future.




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We only sell signs that we

hang on our own walls. If you have a problem with anything you buy from Sump, tell us and we'll sort it out. Pronto.

No fuss. No arguments.


Classic motorcycle signs

Classic bike wall
signs from 8.99

Are Harley-Davidson V-Twin engines consistently the best looking motors on the planet? Some would say so; certainly as far as motorcycles are concerned.

But few would argue that stylewise Harley-Davidson engines are at least among the best, and here at Sump we can comfortably live with that.

We love 'em.

And to pay a modest homage to these great looking (and, in their own way, great performing) engines, we created this metal garage sign.

Five Harley-Davidson engines are illustrated. Top left is the seminal 1909 IOE (inlet-over-exhaust) atmospheric engine. This 45-degree V-twin set the fundamental architecture for most of the other H-D engines to follow.

The capacity is 49.5 cubic inches, or 811cc if you prefer. The horsepower is generally rated at around seven. Harley-Davidson used this crude, but effective motor in a variety of experimental bikes.

Mechanical operation of both valves was just a year or two away courtesy of the F-Head. But for 1909, the atmosphere looked after the induction side leaving a cam operated side valve on the exhaust.

Top right on the sign is the 61-cubic-inch (1,000cc) EL Knucklehead, Harley-Davidson's first production OHV V-twin. The company didn't originally call it a "Knucklehead", note. The buying public came up with this retronym. Regardless, it was/is a great engine and certainly one of the most stylish.

The first was built in 1936. The last was built in 1947. Horsepower was around 40. 100mph was possible. It was superseded by the 74-cubic inch FL Knucklehead (1208cc).

Bottom left is the FL Panhead engine. Built between 1948 and 1965, the Panhead has been variously rated at around 60hp. We've got doubts about that, but who are we to argue? Either way, it was a great leap forward. Aluminium (aluminum) cylinder heads (as opposed to cast iron). Hydraulic lifters. Better oiling. Stronger bearings. And a cleaner, "modern" look.

That illustrious motor gave way to the 74-cubic inch (1208cc) FL Shovelhead (bottom right). Arguably, this wasn't such a radical step beyond the Pan, but it was a move in the right direction.

Horsepower was still reckoned to be around 60. Or maybe even 65. H-D never released such figures, so there's no official number to argue about.

Finally, the larger image in the centre of our sign is the 107-cubic inch Milwaukee Eight motor. Like its slightly larger brother, the 114-incher, these engines are the best (so far) that H-D has produced. They're a development of the Twin Cam engine which was in turn developed from the Evolution (Evo)engine.

Ideally, the Evolution engine ought to be up there with the others. It was certainly a major milestone. But there's only so much space on the sign, and we figured the Milwaukee Eight motor adequately speaks for the Evo.

We hope you agree.

The size of this sign is a generous 300mm x 400mm, which is roughly the size of two A4 sheets of paper. The signs are printed direct to metal in the traditional way. The price is 14.99.

Will you like it when you see it? We think so. If we didn't, we wouldn't be flogging 'em.

We package these signs as well as we reasonably can, and we despatch as soon as possible (usually within 24 hours of ordering, and very rarely longer than 2-3 days if stock has run out and needs to be re-supplied).

Either way, we'll keep you posted. And if for any reason we can't supply your sign, we'll tell you without unnecessary delay and will refund your money in full.

And remember this if you will:

We don't sell anything that we don't hang in our own garages.




Copyright Sump Publishing 2018