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Cannonball Big Twin Flathead Crankcases

Reproduction crankcases which meet or exceed highest restoration demands. Cast from state-of-the-art materials and machined on CNC equipment for strength and precise fitment. Intended to work with stock or identically constructed engine components. Finished and detailed like the original counterparts so these cases will smoothly blend into your old mill to give it a new life. For ease of installation both case halves are carefully matched and feature pre-installed case bushing which are line bored and lapped for standard rollers. Cam bushings are already in place, too, reamed to standard size.

The selection includes cases with a smooth, uniform glass bead blasted finish and cases with an NOS (new old stock) finish. The latter means the finished cases are not bead-blasted but treated in a traditional process which gives them the appearance of new factory cases that had been sitting on the shelf for 50 years. Perfect for those "patina restorations".

All cases feature laser-engraved CB production numbers, which are registered and filed.

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Crankcases by Cannonball, fits Big Twin Flathead 1937-1948, cast aluminum, replaces OEM 24515-37, Germany
W&W# Picture Price incl. VAT* Available from warehouse Germany?
63-405 Cannonball Big Twin Flathead Crankcases bead blasted 2,234.70 € each
in stock
63-415 Cannonball Big Twin Flathead Crankcases "NOS-finish" 2,234.70 € each
in stock
* The price includes German VAT (19% or reduced rate of 7% for Books).

Accessories:

  • 84-830

    84-830 Stud kit by Colony, for Cylinder base, fits Big Twin 1930-1977, steel, parkerised, length: 2-5/32”, thread: 7/16”-14 / 7/16”-20, replaces OEM 16831-30, gross ...

  • 83-126

    83-126 Bolt kit, for Crankcases, fits Flathead Big Twin 1940-1948, steel, cadmium-plated / parkerised, hex head, replaces OEM 444-30, 446-37, 447-30, and 0177, gross ...

  • Tappet Guides for Flatheads

    Tappet Guides for Flatheads Accurate reproductions of the front and rear cylinder tappet guides as used on Big Twin and 45 cui. Flatheads.

  • James Gasket Kits for Engines: Big Twin Flathead 1936-1948

    James Gasket Kits for Engines: Big Twin Flathead 1936-1948 Each complete kit contains all necessary gaskets, oil seals and O-rings for the complete overhaul of one engine. All gaskets are available individually, too.

  • Crankcase Roller Bearings - Big Twin 1936-1954

    Crankcase Roller Bearings - Big Twin 1936-1954 Reproductions of OEM  bearing retainers, thrust washers and spacers for all Big Twins 1936-1954.

  • Cannonball Cylinders for Big Twin Flathead

    Cannonball Cylinders for Big Twin Flathead Make your old trusty Flathead mill run again as if shot from a cannon. These authentic reproductions of the highly sought after 80 cui. cylinders spell relief ...

See also:

  • Andrews Cams Big Twin Flathead

    Andrews Cams Big Twin Flathead These stock replacement cams for Big Twin Flatheads of the U series are similar to original parts but the lobes have been redsigned using modern computer cam ...

  • Truett & Osborn Flywheels

    Truett & Osborn Flywheels Worn flywheels are a major obstacle during the rebuild of an engine, mostly with big expenses required to put them back into service. In such a case it is ...

  • Ignition Systems Flathead, K-Model, Sportster 1937-1965

    Ignition Systems Flathead, K-Model, Sportster 1937-1965 Accurate repoductions of the factory circuit breaker assembly as used on Flathead, K-Model and Sportster 1937-1965. They come complete with breaker points and ...

  • Aluminum Cylinder Heads

    Aluminum Cylinder Heads Aluminium cylinder heads for Flatheads. Harley-Davidson decided to use aluminium cyclinder heads in 1940, as these have much better heat dissipation abilities ...

  • VG Big Twin Frames

    VG Big Twin Frames Reproduction frames which can be used as stock replacements or as a basis to build a bobber or chopper from scratch. Dimensions and details closely follow the ...

Have any questions?

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    Phone: +49 / 931 250 61 16
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