Engine, Transmission

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

The main challenge during restoration and assembly of Flathead engines is the exchange and alignment of the bushings in the right crankcase and the gear cover. Nine bronze bushings need to be installed and line reamed to ensure that four cams and the pinion shaft with its gears turn smoothly. This is a major task and requires several special reamers, which your average workshop does not have. The problem increases when case and cover were not factory matched.
These Cannonball cases for 1937-1948 Big Twin Flatheads feature a pre-fitted gear cover with all bushings and pins installed and are line bored for a set of Andrews cam gears, which are also included. This work is performed in Germany on a coordinate line boring machine, which is superior to reaming. The cover also has its flutter valve and spring-loaded oil separator seal ring installed. All this will cut the working time for the complete engine assembly at least in half and guarantees a quietly running motor, just as if assembled in Milwaukee, provided that the remaining valve train is in good order, too.

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

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

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.

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.

This Heavy Duty kick starter by Cannonball is boss! For the high strain that Evolution and Twin Cam engines place on the kicker assembly, Cannonball has developed a kickstart kit that can stand up to the highest loads. The often used 4-speed components of conventional kicker kits are not sufficiently dimensioned for large engines or such with high compression. In the Cannonball Kickstarter kit those weak stock components have been eliminated one by one and the typical problem spots were replaced by much stronger parts. For example, the kicker shaft has twice the cross section than stock and the starter wheel has replaceable lead-in ramps made of hardened steel. The kicker cover is made of forged aluminium. If you want a kicker that works reliably when the electric starter fails or if you have a kick-only bike, the Cannonball kicker kit is the best choice.

Fitment hints:
The kit fits all 5-speed Big Twin models 1987-1998 without additional components (except kicker pedal and kicker arm). , Models 1985 and 1986 require the 1987→ clutch cable and the 1987→ steel balls for the release mechanism (3x WW 80-822). WW 22-223 is required to accommodate the cable in the clutch lever. , Dyna models require modification of the interference tube.,

The Cannonball StealthStarter system converts your classic kickstart-only motorcycle to electric start. After installation you just push the button or turn the key to fire up your classic Big Twin.
The Cannonball SSK electric start system bolts between kicker cover and transmission case. The stock kick starter can be retained. Due to the system’s low profile, only ¾” (19 mm) wide construction the overall appearance of your motorcycle will remain virtually unchanged. Primary drive, primary housing and oil tank will stay untouched.
Installation is fairly easy and straightforward. The kit includes everything needed for the conversion except for the extended throwout bearing, battery, wires and starter button/switch.
If the bike is still equipped with an early stock 6 V electrical system, you will have to convert this to 12 V. Depending on the configuration some other options are available separately.
Since the kicker cover moves 19 mm to the right the following modifications may be necessary:
A stock 2-1 exhaust system will have to be routed slightly outward to compensate for the offset of the kicker cover. , A longer clutch release lever will be necessary on rod actuated configurations like Moustraps or Footclutch. A longer lever can be ordered seperately if needed., A extended throwout bearing must be ordered seperately for your type of clutch pushrod since the stock pushrod will be 19 mm too short.,
A longer brake crossover shaft will be necessary on all bikes using the original mechanical rear brake in conjunction with the original 2-1 or similar exhaust. A longer crossover shaft can be ordered separately if needed. , Original rear fenders need to be slightly dented for starter motor clearance. Alternatively, an aluminum “Dent” can be ordered separately. In this case the fender needs to be cut out to allow the “dent” to be mounted with the original lower fender mount bolt and the two oil tank/battery tray bolts.,

The Cannonball StealthStarter system converts your classic kickstart-only motorcycle to electric start. After installation you just push the button or turn the key to fire up your classic Big Twin.
The Cannonball SSK electric start system bolts between kicker cover and transmission case. The stock kick starter can be retained. Due to the system’s low profile, only ¾” (19 mm) wide construction the overall appearance of your motorcycle will remain virtually unchanged. Primary drive, primary housing and oil tank will stay untouched.
Installation is fairly easy and straightforward. The kit includes everything needed for the conversion except for the extended throwout bearing, battery, wires and starter button/switch.
If the bike is still equipped with an early stock 6 V electrical system, you will have to convert this to 12 V. Depending on the configuration some other options are available separately.
Since the kicker cover moves 19 mm to the right the following modifications may be necessary:
A stock 2-1 exhaust system will have to be routed slightly outward to compensate for the offset of the kicker cover. , A longer clutch release lever will be necessary on rod actuated configurations like Moustraps or Footclutch. A longer lever can be ordered seperately if needed., A extended throwout bearing must be ordered seperately for your type of clutch pushrod since the stock pushrod will be 19 mm too short.,
In case your bike uses the older 47698-58A transmission mounting plate with the extension for the primary adjuster screw, the extension needs to be removed or our Cannonball SSK-S transmission mounting plate needs to be used.

Precise reproduction of the factory cam as used in 61” OHV Knuckleheads 1936-1939. All measurements and specs were taken from an original example. It features the distinctive six lightening holes in the gear, hence the nickname "Light(e)ning" cam. Fits all Knucklehead 61” and 74” models and years.

After the successful introduction of the FLH Super Sport Solo Panhead in 1955, the factory felt that its high compression motor needed a special cam to deliver the full potential, or Z-O-O-M in Milwaukee speak. So for the following model year the FLH received a performance cam, called "Victory" or "H" cam. The works magazine "The Enthusiast" claimed a significant increase of 12% in horsepower and torque over the FL models that would make the motorcycle "take off like a guided missile". As a unique feature the H cam has different intake lobe profiles for the front and rear cylinder (see chart). This was done by the MoCo to even-out the fuel distribution and the power between the front and rear cylinders. The Cannonball reproduction of the Victory cam is precisely manufactured, with measurements and specs taken from a perfect original example.