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Shop Engine Lower End
Gear Case

Gear Case

Gear Case Parts for IOE Models
Gear Case Parts for IOE Models
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Gear Case Parts for 45” Sidevalve and Model K
Gear Case Parts for 45” Sidevalve and Model K
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Gear Case Parts for Sportster
Gear Case Parts for Sportster
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Gear Case Parts for Big Twin Flatheads 1937-1948
Gear Case Parts for Big Twin Flatheads 1937-1948
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Gear Case Parts for Big Twin OHV 1936-1953
Gear Case Parts for Big Twin OHV 1936-1953
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Gear Case Parts for Big Twin 1954-1969
Gear Case Parts for Big Twin 1954-1969
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Gear Case Parts for Big Twin 1970-1999
Gear Case Parts for Big Twin 1970-1999
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OEM Type Oil Screen Case Plugs
OEM Type Oil Screen Case Plugs
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Custom Oil Screen Case Plugs
Custom Oil Screen Case Plugs
Chrome-plated plug as replacement for slotted oil screen plug, that is difficult to open most of the time.
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Pinion Shaft Oil Pump Drive Gears for OHV Big Twin 1939→
Pinion Shaft Oil Pump Drive Gears for OHV Big Twin 1939→
Pinion shaft drive gears for the oil pump. Indicated years refer to the stock application. 1973-1984 gears can be used in 1954-1972 engines If you follow this rule:
5 tooth gears on the pinion shaft require 25 tooth oil pump shaft drive gears. , 6 tooth gears on the pinion shaft require 24 tooth oil pump shaft drive gears.,
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OEM Breather Valve for Big Twin 1977-1999
OEM Breather Valve for Big Twin 1977-1999
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S&S Breather Valves
S&S Breather Valves
Stock replacement breather valves by S&S for all OHV Big Twins 1936–up.
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S&S Crankcase Breather Reed Valve Evolution
S&S Crankcase Breather Reed Valve Evolution
The Evolution style S&S breather reed valve replaces the standard rotary breather valve in 1993→ Evolution Big Twin style engines. Installation is fast and simple. No aligning timing marks, and no rotating parts. There is a +.030“ oversized reed valve for engines with heavily damaged breather bores.
How does it work?
Unlike the rotary breather valve that has been used in Harley-Davidson big twin engines since the 1920‘s, the S&S crankcase breather reed valve is not dependent on the rotation of the crankshaft to make it open and close. Therefore the opening and closing times are not determined by crankshaft position. The functional part of the reed valve consists of three steel reeds that are normally in the closed position. When the pistons travel downward in the cylinders, the air in the crankcase is compressed and pressure in the crankcase below the pistons increases. This pressure causes the reeds to open, allowing the air, oil and oil mist in the crankcase to escape into the cam chest. When the pistons change direction and begin traveling back upward in the cylinders, a vacuum is created in the crankcase. The vacuum causes the reeds to close, preventing air from entering the crankcase. The effect is that a slight vacuum is maintained in the crankcase and oil scavenging is greatly improved. This is most significant at high rpm when the time available to get the air out is the shortest.
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Thrust Washer Sets for Breather Valve
Thrust Washer Sets for Breather Valve
Steel thrust washers for original and S&S breather valves.
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Individual Thrust Washers for Breather Valves
Individual Thrust Washers for Breather Valves
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Thrust Washers for Plastic Breather Valves
Thrust Washers for Plastic Breather Valves
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Tachometer Block-off Plug for Sportster
Tachometer Block-off Plug for Sportster
Chrome-plated plug that installs in lieu of tachmeter drive.
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S&S Circuit Breaker and Generator Drive Gears
S&S Circuit Breaker and Generator Drive Gears
High quality circuit breaker and generator idler gears by S&S for generator Big Twin style engines.
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The Cyclery Pinion Gears Big Twin Flatheads 1930-1936
The Cyclery Pinion Gears Big Twin Flatheads 1930-1936
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Pinion Gears OHV Big Twin →1953
Pinion Gears OHV Big Twin →1953
Pinion gears in proven quality. Like it was the case before 1954, these are not color coded and a bit on the small side so they should work in most situations.
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Jims Pinion Gears for Big Twin 1954-1989
Jims Pinion Gears for Big Twin 1954-1989
Pinion gears in proven JIMS quality. The color code is identical to the factory  codes so they can be used as stock replacement. If the color code is unknown we recommend to order a gear in the middle size range. These sizes fit 9 out of 10 engines and provide adequate clearance under most circumstances. As a rule of thumb it is preferable to allow slightly more gear lash than too little.
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Cam Drive Chain Tensioners Twin Cam
Cam Drive Chain Tensioners Twin Cam
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Timing Chains
Timing Chains
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Hydraulic Cam Chain Tensioner Plate Upgrade Kit
Hydraulic Cam Chain Tensioner Plate Upgrade Kit
This kit updates the cam chain tensioner of your early-model Twin Cam 88 engine to the latest design, as featured on the Twin Cam 96 engine. The billet cam support plate has been designed to allow the installation of the late-model hydraulic cam chain tensionser to early Twin Cam-equipped models. These hydraulic cam chain tensioners will significantly outlast the spring loaded tensioners, and are an ideal addition to an engine modified for improved performance. In addition, '02-'06 models use the included late-model single row front cam chain and sprockets ('99 - '01 models use the existing front silent chain). The kit includes the improved late-model oil pump that increases flow by 8% and scavenging by 22% to enhance other performance upgrades.
Installation requires the separate purchase of a spacer kit.
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Cam Bearings Twin Cam
Cam Bearings Twin Cam
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Spacers for Cam Shafts Twin Cam
Spacers for Cam Shafts Twin Cam
This kit is needed for installing the hydraulic cam chain tensioner plate upgrade Kit.
Contents (1 each):
0.307” (7.80mm), 0.317” (8.05mm), 0.327” (8.30mm), 0.337” (8.56mm), 0.347” (8.81mm), 0.357” (9.07mm),
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Spacer Shims Twin Cam
Spacer Shims Twin Cam
Set of 5 different spacers to establish the correct alignment of the cam drive gear.
Contents (1 each):
0.287” (7.29mm), 0.297” (7.54mm), 0.307” (7.80mm), 0.317” (8.05mm), 0.327” (8.30mm),
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Gaskets for Gear Case
Gaskets for Gear Case

Parts in the timing case

The timing case is an integral part of the right-hand engine case on Harley-Davidson air-cooled V engines. The timing case contains the gears for the camshafts, the oil pump drive and the ignition and, of course, for the generator, as well as the bearing bushes or needle bearings for the gears and shafts. In the Twin Cam and Milwaukee Eight OHV engines, this also includes the timing chains. And on all models, the engine is vented via the timing case. The timing case is closed by the timing cover.

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