Gear Case

Opened up the gear case of your just acquired Knuckle or early Pan engine to find a bunch of bits worn beyond repair?
This gear set helps you along. It contains all necessary components, except for the camshaft, to put your gear case back into as new condition. Everything precisely machined and matched to factory specs:
pinion gear, breather gear, circuit breaker drive gear with stud, screw and spacer, generator idler gear with stud, screw and spacer, oil pump drive gear (5 t), oil pump driven gear (25 t), gear shaft bearing seal, gear shaft spring,

Chrome-plated plug as replacement for slotted oil screen plug, that is difficult to open most of the time.

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.,

Stock replacement breather valves by S&S for all OHV Big Twins 1936–up.

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.

Steel thrust washers for original and S&S breather valves.

Chrome-plated plug that installs in lieu of tachmeter drive.

High quality circuit breaker and generator idler gears by S&S for generator Big Twin style engines.

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.

Pinion gears in proven S&S 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.

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.

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.

This kit is needed for installing the hydraulic cam chain tensioner plate upgrade Kit.

Set of 5 different spacers to establish the correct alignment of the cam drive gear.