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Shop Engine Top End Cylinder Heads for Knucklehead
Cannonball Aluminum Cylinder Heads for Knucklehead

Cannonball Aluminum Cylinder Heads for Knucklehead

Price and stock:
Item №
62-306
Price incl. VAT
4,026.96 €
Available
0
Temporarily out of stock
The price includes 642.96 € German VAT.

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  • Cylinder head set »Knucklehead« by Cannonball
  • fits OHV models 1936-1947
  • cast aluminum, bare
  • net weight: 5.35 kg
  • nominal bore: 3-7/16 ”
  • exhaust flanges G: Knucklehead
  • head bolt pattern: Knucklehead
  • intake manifold flanges: Knucklehead plumber type (1940-1947)
  • oil supply: external
  • plug threads: 1 x M18 x 1.5 x 12.7 mm
  • replaces Harley-Davidson part number HD 16700-40, and 16697-40
  • Germany
  • gross weight: 8.59 kg

Reproductions of Knucklehead style cylinder heads, cast from aluminum. The advantages of this material are obvious: besides the significant weight savings of approx. 4 kg per head, they dissipate heat much better than their cast iron counterparts. That's why the Motor Company implemented aluminum heads on the follow-up Panhead series.

On the down side you have a somewhat lower robustness, which is not really relevant on stock motors, however, when high revs and compression rates, or nitrous and supercharging come into play, well, that’s a different story. So, as always, race oriented riders and their mechanics have to decide which route they would follow.

The design closely matches that of 1940-1947 heads with large intake ports. But technically the Cannonball heads are not just 1:1 copies of the cast iron patterns. That wouldn't work. For a safe operation of both valve seats and guides the manufacturer established additional material around them to securely hold everything in place. Valve seats are pre-installed and sized for stock intake and exhaust valves, but unmachined. They are hardened for the use of today’s unleaded fuels. Steel inserts for the head bolts feature factory threads. The heads show all the small details like cast-in number tags and foundry markings, so they make for excellent stock replacements or for building a performance engine with factory look when you camouflage them with black paint.

Installation of Valve Guides and Tins

Unlike cast iron heads, Knucklehead aluminum heads need to be pre-heated and the valve guides be cooled for proper installation. Important: temperature for the heads must not exceed heat resistance of the valve tin sealant.

Accessories:

60-954

60-954

Valve springs by Kibblewhite Precision Machining; fits Knucklehead 1936-1947, Panhead 1948-1965 (exc. 1955-1965 FLH); chromium-silicon steel; max. travel: 0.415 ”; pressure closed valve: 120 lbs; pressure open valve: 260 lbs; 8 pieces; replaces OEM HD 168-36, 169-36, 18203-36, and 18204-36; USA; gross weight: 376 g
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67-052

67-052

Screw-in nipple; for Cylinder head / Manifold; fits 61/74 cui OHV 1940-1954 and WLDR, WR, K, KR models 1940-1965; steel, parkerized; height: 3/4”; inner Ø: 1-9/16 ”; thread: 1-3/4”-20 / 1-15/16”-20; with 3/16” and 1/4” Ø rivet; replaces OEM HD 27039-40, 27039-48, 27045-32, and 27046-48; gross weight: 60 g
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Nuts for Rocker Housings OEM Style

Nuts for Rocker Housings OEM Style

Exact duplicates of the large rocker shaft nuts. They feature the low profile design of the original counterparts.
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Cannonball Rocker Housings

Cannonball Rocker Housings

Authentic reproductions of Knucklehead rocker housings as used by the factory from 1938-1947. You can install them as they come or brush and polish to your personal liking. Precisely machined on CNC equipment for a perfect fit.
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Cylinder Head Bolts Kits: Knucklehead

Cylinder Head Bolts Kits: Knucklehead

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James Gasket Kits for Top End: Knucklehead 1936-1947

James Gasket Kits for Top End: Knucklehead 1936-1947

Include all gaskets for top end overhaul.
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Knucklehead/Panhead Manifold Nipple Conversion Kit

Knucklehead/Panhead Manifold Nipple Conversion Kit

To convert 1940–54 Knucklehead/Panhead cylinder head inlet fittings from plumber style to o-ring style manifold.
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S&S Rocker Arms and Shafts

S&S Rocker Arms and Shafts

Hard to find rocker arms and shafts remanufactured by S&S. These high quality rocker components are the same as S&S uses in the KN- Series engines, and will fit stock Knucklehead engines as well since they feature the the stock 1:1 rocker ratio. Each complete set comprises four rocker arms, rocker shafts, washers, spacers and special O-ring seals. The shafts are also available separately but are not compatible with stock rocker arms.
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Cups and Covers for Valve Springs/Rocker Arms

Cups and Covers for Valve Springs/Rocker Arms

Complete kits of tins for the valve springs and rocker arms. The selection includes the early "baby food jars" and the later 1938-1947 covers, which include all small parts like bolts, strips and gaskets. These exact reproductions are ready-to-install with oil lines and nuts attached....
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OEM Type Valve Collars

OEM Type Valve Collars

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KPM Black Diamond Valves - for Knucklehead 1936-1947

KPM Black Diamond Valves - for Knucklehead 1936-1947

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KPM Cast Iron Valve Guides - for Knucklehead 1000+1200cc 1936-1947

KPM Cast Iron Valve Guides - for Knucklehead 1000+1200cc 1936-1947

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See also:

Cannonball Knucklehead Crankcases

Cannonball Knucklehead 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 bushings, which are line bored and lapped for standard rollers. Cam bushings are already in place and reamed. (For exact measures pls see facts)....
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Cannonball Cylinder Heads for Knucklehead

Cannonball Cylinder Heads for Knucklehead

These Knucklehead style cylinder heads are precise reproductions of the stock counterparts and show all the small details like cast-in number tags and foundry markings. Thus they make for great replacements for your worn top end or to build a factory look-alike engine. They are manufactured after 1940-1947 heads with large intake ports. The pre-installed, but unmachined valve seats are sized for stock intake and exhaust valves and hardened for the use of today’s unleaded fuels.
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Cannonball Knucklehead and Panhead Manifolds 1940-1954

Cannonball Knucklehead and Panhead Manifolds 1940-1954

Reproduction of the stock intake manifold for Knuckleheads and Panheads in lightweight cast aluminum. Made extra wide (97 mm), which is excellent when you build an engine with longer cylinders or stroker plates. Requires to be shortened to match the respective situation.
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Cylinders for Knucklehead

Cylinders for Knucklehead

Replacement cylinders for orignal barrels which have reached their wear limit. Design, finish and workmanship exactly correspond to the stock counterparts.
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Have any questions?

Our service team will be glad to help out: Mondays - Thursdays 08:00-17:00 CET, Fridays 08:00-16:00 CET, Phone: +49 / 931 250 61 16, eMail: service@wwag.com