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BAKER Drivetrain

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A B C D E F G H I J K L M N O P R S T U V W Y Z

BAKER Drivetrain

The American company BAKER Drivetrain, founded by engineers Lisa & Bert Baker, achieved in just few years to develop absolute high-end products in their segment for H-D motorcycles. Quality and craftsmanship of Baker drivetrains and transmissions is so outstanding that top-notch customizers and racers around the world more and more often rely on them. Baker ground gears are finished with diamond coated tooling after heat treat so the gear flanks are flawless. This achieves reductions in gear noise and friction losses unknown to this day. Once you experienced the smooth shifting and quiet operation of a Baker transmission you will know that a perfectly functioning gear box for Harleys DOES exist. Buyer beware! Far East copies that arrived on the market lately use inferior gears and shafts made from steel alloys that would be more appropriate for the manufacture of soup cans.

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Products by BAKER Drivetrain in our web shop:

BAKER 4-Speed Handshift Transmissions

The love affair with classic motorcycles will never stop and there’s nothing like putting authentic, vintage styled components on your nostalgic bike. That’s why BAKER has taken the time to reinvent the 4-speed transmission. BAKER 4-speeds are intended as stock replacements and work as bolt-in transmission on most models, whether you’re running a stock closed type primary or open belt drive. While looking like the original patterns on the outside, they are packed inside with improvements and extras:
Gearset is made out of high grade 8620 steel, Gears ride on needle bearings, High tensile cast aluminum (A356-T6) transmission case, designed for roller ball bearing main drive gear, With 1979-83 Big Twin 5 speed sprocket, Stock replacement hand shift top cover, Billet steel machined and case hardened shift drum rides on two Permaglide bushings, With BAKER Klassic kicker gears, Vintage style cast kicker cover, Includes 1939-75 style throw-out bearing and release rod,
Kicker pedal and kicker arm are not included and must be ordered separately. The selection includes transmissions with 1947-1964 handshift tops:
shift lever on transmsission points down, works with 1st gear backward shifter gates,

Gear ratios:

1st - 2.50:1
2nd - 1.70:1
3rd - 1.25:1
4th - 1:1

BAKER 4-Speed Footshift Transmissions

The love affair with classic motorcycles will never stop and there’s nothing like putting authentic, vintage styled components on your nostalgic bike. That’s why BAKER has taken the time to reinvent the 4-speed transmission. BAKER 4-speeds are intended as stock replacements and work as bolt-in transmission on most models, whether you’re running a stock closed type primary or open belt drive. While looking like the original patterns on the outside, they are packed inside with improvements and extras:
Gearset is made out of high grade 8620 steel, Gears ride on needle bearings, High tensile cast aluminum (A356-T6) transmission case, designed for roller ball bearing main drive gear, With 1979-83 Big Twin 5 speed sprocket, Ratchet top cover with linear detent system for smooth reliable shifting, Billet steel machined and case hardened shift drum rides on two Permaglide bushings, With BAKER Klassic kicker gears, Vintage style cast kicker cover, Includes 1939-75 style throw-out bearing and release rod,

Gear ratios:

1st - 2.50:1
2nd - 1.70:1
3rd - 1.25:1
4th - 1:1

The shift drums on FL and Fx style versions are different, while the shift pattern is 1N234 for both. So, on FL style ratchets the shifter lever points downward, while on FX style ratchets the lever points upward.

BAKER 6 into 4 Transmissions

Convert your old rumblin’ mill into a purring interstate mile eater. These transmissions are replacements for stock 4-speed units. They bolt directly into your stock frame and your stock 4-speed primary and dry clutch fit right up.
The BAKER 6 into 4 has a 1:1 fifth gear and a 0.86:1 overdrive sixth gear for a 500 rpm reduction in cruising rpm on the highway. There is no provision for mechanical speedo drive, but the case accepts a sensor. The sensor-triggering gear has 37 teeth.

Gear ratios:

1st - 2.94:1
2nd - 2.21:1
3rd - 1.60:1
4th - 1:1.23
5th - 1:1
6th - 1:0.86

BAKER Overdrive 6-Speed Transmissions

This is the original 6-speed design that revolutionized the American V-Twin industry. Yet, it‘s still one of the best overdrive 6-speeds built to this day...hands down. The BAKER OD6 is built to comfortably handle the power from today's big-inch motors and has the gear ratios to suit your fast highway cruising needs. Example: in 6th gear at 70 mph, the engine revs 2720 rpm compared to 3170 rpm with a regular 5-speed transmission (calculated data based on a 24/37 primary, a 32/70 secondary, and a 25” rear tire).

Gear ratios:

1st - 2.94:1
2nd - 2.21:1
3rd - 1.60:1
4th - 1.23:1
5th - 1:1
6th - 0.86:1

BAKER Kicker Arm offset

A super strong kicker arm which has a twice as thick cross section compared to stock counterparts. Features a 45 mm offset design to clear most exhaust systems.

BAKER Kicker Arm straight

A super strong kicker arm which has a twice as thick cross section compared to stock counterparts. Since this kicker arm is straight, make sure it´ll clear your exhaust before ordering.

BAKER Kicker Pedal

This kicker pedal is cast from bronze and reinforced throughout. It features a heat treated spindle with 5/8” diameter (stock = 1/2”) to prevent breaking.

BAKER Billet Steel Shift Forks

The BAKER Shift Fork Kits include all three forks and are a direct replacement for the standard OEM 5-speed transmission forks but with much needed improvements over the stock design. Cross section is three times thicker than stock.

BAKER High Torque Ball Bearings

The OEM 34091-85 inner bearing race has been used on Big Twins since 1985. The inner primary bearing rides on this race. By design, this race press-fits onto the transmission mainshaft. This system works fine for stock motors, however, 100 HP+ motors will make this bearing walk on the mainshaft. If it walks inboard, it will damage the maindrive gear seal and cause a transmission oil leak. If it walks outboard, it will cause a primary oil leak. Our high torque bearing kit eliminates this condition. Kit includes a precision honed bearing and seal.

BAKER Shifter Lever

BAKER improved the shape of the splines, to prevent stripping, and a thicker truss style cross section offers a stronger overall design.

BAKER Ratchet Pawls

The stock ratchet pawl used from 1980 to 2000 utilized a scissor spring that was well known for breaking. Each time an upshift or downshift is made the pawl spring is cycled. After many cycles, the spring leg breaks. The unfortunate side effect of this failure is the broken spring leg going through the transmission gears and destroying the transmission. The BAKER ratchet pawl utilizes a more substantial, rectangular cross-section spring like the 21st century Big Twins. Other improvements include:
Lever ‘beak’ for overshift protection, Pawl shaft lever splines are hobbed on a gear cutter just like our gears for high strength,

BAKER Transmission Dipstick

Have you ever heard of a 5-speed transmission dipstick breaking off and working its way into the transmission with disastrous results? Ask any seasoned technician; he’s seen one. Over time, the low frequency firing pulses of the American V-twin make the stock zinc die-cast dipstick break off and now you know the rest of the story. Bigger motors make this situation even worse. BAKER redesigned the dipstick with the largest radius possible between the stalk and the head. This radius stiffens the dipstick and increases its natural frequency.

BAKER Speedo Sensor Hole Plug

If you need to cap off the speedo sensor hole for whatever reason, you need this plug. Some other companies do this with a steel plate and a gasket, just like old 4-speeds. BAKER plugs are machined from 6061-T6 and include a no-leak o-ring and a chrome button head screw for a clean look.

BAKER Pulley Spacer

Over time and miles with dirt and grit, the stock 33344-94 spacer is too soft and it gets gouged by the seal that rides against it. As the spacer gets gouged, the seal relaxes. When the seal relaxes, the leaks begin. The BAKER sprocket spacer is a direct replacement for the stock spacer except it is case hardened steel that has a Rockwell ‘C’ hardness of 55. No more gouging, no more leaks.

BAKER 6 into 4 Adjuster Screw for Performance Clutches

When using aftermarket clutches like Barnett Scorpion and Rivera Pro-Clutch with 7/16”-20 adjusters you require this special adjuster screw and locknut.

BAKER 6 into 4 Adjuster Screw for OEM Clutches

When using stock clutches you require this special adjuster screw.

BAKER Handshift Top Covers

Performance transmission top assemblies for handshifter Big Twin models by the US company BAKER.
They feature billet steel machined and case hardened shift systems that rotate on Permaglide bushings and a linear detent system for a smooth repeatable shift each time. The lids are cut out of Aircraft grade 6061-T6 billet aluminum. A hidden top cover vent design eliminates clogged vent screws.

BAKER Ratchet Tops

Performance transmission top assemblies by the US company BAKER. These stock replacement Ratchet Tops are available in your choice of an FL or FX shift system, with the FL systems set up as bottom pull and FX systems set up for top pull.
All tops feature billet steel machined and case hardened shift systems that rotate on Permaglide bushings and a linear detent system for a smooth repeatable shift each time. The lids are cut out of Aircraft grade 6061-T6 billet aluminum. A hidden top cover vent design eliminates clogged vent screws. The shifter pawl backing plate is hard anodized for wear resistance.

BAKER N1 Shift Drum Kit

The N1 shifter drum by Baker converts a standard FL shifter cover (ratchet top 1952-1979) from the stock 1N234 shift sequence to 4321N (Neutral all the way up). This is very helpful when drag racing or at traffic light "encounters", because you just stomp down on the shift lever from Neutral to upshift. Jockey shifters and suicide clutch users also benefit from this set-up because the "all the way forward" neutral makes quick stops safer.

BAKER Kicker Cover Billet for Cable Clutch

This kicker cover is milled from solid aluminium, which guarantees high stability. Cracks, as they occur more frequently in cast iron covers, are therefore almost excluded. It features an integrated Evo type ramp and ball release mechanism for smooth and easy clutch actuation and is designed to work with 1987→ clutch cables. The clutch release lever and clutch cable bracket are omitted. Kicker shaft, high-strength BAKER Klassic starter gear are pre-assembled.

BAKER Kicker Cover Function Formed for Hydraulic Clutch

High performance kicker cover which features a show polished BAKER "Function Formed" design and which is machined from Aircraft Grade 6061 Billet aluminum for strength and increased part life. Included with this cover is a pre-installed 1-piece kicker shaft bushing plus smooth and strong BAKER Klassic kicker gears.

BAKER Klassic Kicker Gear Set

The time honored 1936 design, re-engineered by the US company BAKER. These gears are CNC-machined and heat treated, which results in smooth rolling and high wear resistance. No more broken-off stop pegs and deformed kick-back plates. These are the last kicker gears you will buy for a long, long time. Each kit consists of five pieces and fits all 1936-85 four speed transmissions.

Clutch Pushrods for BAKER Kicker Covers

BAKER starter covers use thinner than stock pushrods.

Baker Pulley Locking Tool

The pulley locking tool is clamped to the pulley as shown and prevents pulley rotation while torqueing the 1-7/8” pulley nut to the proper factory spec. of 50ft-lbs +35o. Anodized candy apple red. Works on 29-34 tooth pulleys.

4-speed transmission by BAKER Drivetrain; for aluminum primary covers; fits Big Twin 1965-1969; FL style ratchet; cast aluminum / steel, bare; with 23 tooth sprocket; replaces OEM HD 33011-65, and 33011-68; USA; gross weight: 18.1 kg

4-speed transmission by BAKER Drivetrain; for aluminum primary covers; fits Big twin 1970-1985; footshift; FL style ratchet; cast aluminum / steel, bare; with 23 tooth sprocket; USA; gross weight: 18 kg

4-speed transmission by BAKER Drivetrain; for aluminum primary covers; fits Big twin 1970-1985; footshift; FX style ratchet; cast aluminum / steel, bare; with 23 tooth sprocket; USA; gross weight: 19 kg

6-speed transmission »6 in 4« by BAKER Drivetrain; fits Knucklehead 1936-1947, Big Twin Flathead 1937-1948, Panhead 1948-1964; cast aluminum / steel, black; with 23 T sprocket, chrome-plated kicker cover; USA; gross weight: 22 kg

6-speed transmission »6 in 4« by BAKER Drivetrain; fits Knucklehead 1936-1947, Big Twin Flathead 1937-1948, Panhead 1948-1964; cast aluminum / steel, polished; with 23 T sprocket, chrome-plated kicker cover; USA; gross weight: 22 kg

6-speed transmission »6 in 4« by BAKER Drivetrain; fits Knucklehead 1936-1947, Big Twin Flathead 1937-1948, Panhead 1948-1964; cast aluminum / steel, bare; with 23 T sprocket, chrome-plated kicker cover; USA; gross weight: 22 kg

6-speed transmission »6 in 4« by BAKER Drivetrain; fits 4-speed Shovelhead 1970-1984; cast aluminum / steel, black; with 23 T sprocket, chrome-plated kicker cover; USA; gross weight: 20 kg

6-speed transmission »6 in 4« by BAKER Drivetrain; fits 4-speed Shovelhead 1970-1984; cast aluminum / steel, polished; with 23 T sprocket, chrome-plated kicker cover; USA; gross weight: 21.9 kg

6-speed transmission »6 in 4« by BAKER Drivetrain; fits 4-speed Shovelhead 1970-1984; cast aluminum / steel, bare; with 23 T sprocket, chrome-plated kicker cover; USA; gross weight: 22 kg