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Primary Chainguards Big Twins 1936-1964

Primary Chainguards Big Twins 1936-1964

Inner Primary Chain Guards for Big Twin 1936-1954
Inner Primary Chain Guards for Big Twin 1936-1954
Inner steel primary chain guard for all Big Twins from 1936–1954.
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Inner Primary Chain Guards for Big Twin 1955-1964
Inner Primary Chain Guards for Big Twin 1955-1964
Inner steel primary chain guards for Panhead models from 1955–1964.
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OEM Style Diamond Primary Chain Guards for Big Twin 1936-1954
OEM Style Diamond Primary Chain Guards for Big Twin 1936-1954
Use as stock replacement or combine with our inner steel primary chain guards. Does not fit models equipped with compensating sprocket.
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OEM Style Smooth Primary Chain Guards for Big Twin 1955-1964
OEM Style Smooth Primary Chain Guards for Big Twin 1955-1964
Authentic reproduction of the original steel primary cover as used on Big Twins from 1955–1964. Features a deeper front cup to accept the compensator sprocket and the small hole to access its grease fitting. The correct longitudinal crease and the footboard mount indent are also there.
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Custom Diamond Primary Chain Guards for Big Twin 1936-1954 Sport
Custom Diamond Primary Chain Guards for Big Twin 1936-1954 Sport
Custom versions of the sheet metal primary chain guards for 1936-1954 Big Twins with the early Diamond design. This sport version has a lower clutch bulge for more ground clearance when cornering. Nevertheless, most clutches fit into the cover. We recommend a height check when using custom or performance clutches.
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Custom Diamond Primary Chain Guards for Big Twin 1936-1964 Compensator
Custom Diamond Primary Chain Guards for Big Twin 1936-1964 Compensator
Custom versions of the sheet metal primary chain guards for 1936-1964 Big Twins which sports the early Diamond design. They feature a deeper bulge at the front so they will fit models with compensating sprocket, too.
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Custom Smooth Primary Chain Guards for Big Twin 1955-1964
Custom Smooth Primary Chain Guards for Big Twin 1955-1964
Custom version of the primary chain guard used on Big Twins from 1955–1964. It is completely smoothed out for a clean Custom look. Very good craftsmanship with a triple chrome layer. Use it with original or similar inner steel primary housings.
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Inner Chain Guard Drain Pipe for Big Twin 1936-1958
Inner Chain Guard Drain Pipe for Big Twin 1936-1958
Exact reproduction of the Big Twin steel primary drain pipe.
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Primary Chain Oilers for Big Twin 1939-1964
Primary Chain Oilers for Big Twin 1939-1964
Reproduction of the original breather tube. Oil mist from the crankcases and lubrication from the oil pump are directed to the primary chain through this tube.
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Reinforcement Plates for Inner Primary Chain Guards for Big Twin 1936-1954
Reinforcement Plates for Inner Primary Chain Guards for Big Twin 1936-1954
Bolt-in or weld-in reinforcement plate for old, torn inner primary chain guards.
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Mounting Kits for Inner Primary Chain Guards for Big Twin 1937-1964
Mounting Kits for Inner Primary Chain Guards for Big Twin 1937-1964
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Tab Washers for Primary Case
Tab Washers for Primary Case
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Replacement Parts
Replacement Parts
Gaskets
Gaskets

Primary chain covers made of sheet steel from 1936 onwards

Progress in terms of oiling came in 1936 with the oil circulation system of the OHV Twins, which became known as Knucklehead. This circulating lubrication later was also integrated into the side valves, and from 1937 all Harley V Twins had a feed and return pump. The engine ventilation was improved and redesigned, and the amount of lubricating oil for the primary chain could be regulated from then on. The primary chain covers were redesigned accordingly and were fitted with a cork seal all round, the inner and outer primary covers of the large Twins were precisely matched sheet metal stampings. Only the small Twins (750 cc Flatheads) retained the cover without a seal.

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