Motorcycle Transmissions & Parts
![Motorcycle Transmissions & Components](https://ic.motorcycleid.com/motorcycle/pages/transmissions-components/motorcycle-transmissions-components_collage_0.jpg)
- Andrews Products®Transmission Close Ratio Gear Combination (201020)Transmission Close Ratio Gear Combination by Andrews Products®. For peak RPM through the quarter mile, this gear set will provide the super close ratio shifting to handle it. Will work on street or drags with any size motor. With...Precise engineering provides great longevityPeak accuracy and effectiveness$270.99
- Andrews Products®Transmission Close Ratio Gear Set (299110)Transmission Close Ratio Gear Set (299110) by Andrews Products®. Allows you to convert stock 1st gear into a 2.61 close ratio. Plus 7 mph of usable 1st gear. All speed gears are made from high nickel alloy and heat treated and...Precise engineering provides great longevityPeak accuracy and effectiveness$217.98
- Andrews Products®Transmission Close Ratio Gear Set (203375)Transmission Close Ratio Gear Set (203375) by Andrews Products®. Gear Stage: 3. Allows you to convert stock 1st gear into a 1.35 close ratio. New design drive slots include lead in ramps for quicker, more positive shifting. All speed...Precise engineering provides great longevityPeak accuracy and effectiveness$262.34
- Andrews Products®Transmission Close Ratio Gear Set (203365)Transmission Close Ratio Gear Set (203365) by Andrews Products®. Gear Stage: 3. Allows you to convert stock 1st gear into a 1.35 close ratio. New design drive slots include lead in ramps for quicker, more positive shifting. All speed...Precise engineering provides great longevityPeak accuracy and effectiveness$273.89
- Andrews Products®Transmission Close Ratio Gear Set (296110)Transmission Close Ratio Gear Set (296110) by Andrews Products®. Gear Stage: 1. Allows you to convert stock 1st gear into a 2.94 close ratio. All speed gears are made from high nickel alloy and heat treated and shot-peened to give...Precise engineering provides great longevityPeak accuracy and effectiveness$192.78
- Andrews Products®Transmission Countershaft (299170)Transmission Countershaft (299170) by Andrews Products®. Transmission shafts are made of super alloy material for maximum strength and durability for this most critical part. This top-grade product is expertly made in compliance with...Precise engineering provides great longevityPeak accuracy and effectiveness$114.21
- Andrews Products®Transmission Countershaft (296700)Transmission Countershaft (296700) by Andrews Products®. Transmission shafts are made of super alloy material for maximum strength and durability for this most critical part. This top-grade product is expertly made in compliance with...Precise engineering provides great longevityPeak accuracy and effectiveness$117.63
- Andrews Products®Transmission Countershaft (259010)Transmission Countershaft (259010) by Andrews Products®. Transmission shafts are made of super alloy material for maximum strength and durability for this most critical part. This top-grade product is expertly made in compliance with...Precise engineering provides great longevityPeak accuracy and effectiveness$132.08
- Andrews Products®Transmission Countershaft (207800)Transmission Countershaft (207800) by Andrews Products®. Three types of countershafts fit transmissions through 1985. Countershafts are not interchangeable, take care in ordering. This top-grade product is expertly made in compliance...Precise engineering provides great longevityPeak accuracy and effectiveness$39.11
- Andrews Products®Transmission Countershaft (207770)Transmission Countershaft (207770) by Andrews Products®. Three types of countershafts fit transmissions through 1985. Countershafts are not interchangeable, take care in ordering. This top-grade product is expertly made in compliance...Precise engineering provides great longevityPeak accuracy and effectiveness$35.67
- Andrews Products®Transmission Countershaft (207650)Transmission Countershaft (207650) by Andrews Products®. Three types of countershafts fit transmissions through 1985. Countershafts are not interchangeable, take care in ordering. This top-grade product is expertly made in compliance...Precise engineering provides great longevityPeak accuracy and effectiveness$39.11
- Andrews Products®Transmission Countershaft Gear (253030)Transmission Countershaft Gear (253030) by Andrews Products®. Gear Stage: 3. Transmission gears are made from high nickel alloy steel which is heat-treated and shot peened for maximum durability. Shot peening greatly improves the wear...Precise engineering provides great longevityPeak accuracy and effectiveness$124.53
- Andrews Products®Transmission Countershaft Gear (251060)Transmission Countershaft Gear (251060) by Andrews Products®. Gear Stage: 1. Transmission gears are made from high nickel alloy steel which is heat-treated and shot peened for maximum durability. Shot peening greatly improves the wear...Precise engineering provides great longevityPeak accuracy and effectiveness$129.12
- Andrews Products®Transmission Countershaft Gear (252040)Transmission Countershaft Gear (252040) by Andrews Products®. Gear Stage: 2. Transmission gears are made from high nickel alloy steel which is heat-treated and shot peened for maximum durability. Shot peening greatly improves the wear...Precise engineering provides great longevityPeak accuracy and effectiveness$123.05
- Andrews Products®Transmission Countershaft Gear (296440)Transmission Countershaft Gear (296440) by Andrews Products®. Gear Stage: 4. All speed gears are made from high nickel alloy and heat treated and shot-peened to give maximum durability and strength. Also, where applicable, lead-in ramps...Precise engineering provides great longevityPeak accuracy and effectiveness$45.86
- Andrews Products®Transmission Gear (206330)Transmission Gear (206330) by Andrews Products®. Gear Stage: 3. Replacements for stock main and countershaft 3rd. The design of drive slots on mainshaft gear has been upgraded to include lead-in ramps for quicker, more positive...Precise engineering provides great longevityPeak accuracy and effectiveness$156.43
- Andrews Products®Transmission Gear (299103)Transmission Gear (299103) by Andrews Products®. Gear Tooth Count: 28. All speed gears are made from high nickel alloy and heat treated and shot-peened to give maximum durability and strength. Also, where applicable, lead-in ramps have...Precise engineering provides great longevityPeak accuracy and effectiveness$111.08
- Andrews Products®Transmission Gear (299102)Transmission Gear (299102) by Andrews Products®. Gear Tooth Count: 24. All speed gears are made from high nickel alloy and heat treated and shot-peened to give maximum durability and strength. Also, where applicable, lead-in ramps have...Precise engineering provides great longevityPeak accuracy and effectiveness$111.08
- Andrews Products®Transmission Gear (206220)Transmission Gear (206220) by Andrews Products®. Gear Stage: 3. Replacements for stock main and countershaft 3rd. The design of drive slots on mainshaft gear has been upgraded to include lead-in ramps for quicker, more positive...Precise engineering provides great longevityPeak accuracy and effectiveness$93.03
- Andrews Products®Transmission Gear (204260)Transmission Gear (204260) by Andrews Products®. Gear Stage: 4. Replacement fourth gears are made with wider drive slots and steeper lead-in ramps for positive three-four shifting. Replacement fourth gears are made with wider drive...Precise engineering provides great longevityPeak accuracy and effectiveness$190.03
- Andrews Products®Transmission Gear (204280)Transmission Gear (204280) by Andrews Products®. Gear Stage: 4. Replacement fourth gears are made with wider drive slots and steeper lead-in ramps for positive three-four shifting. Replacement fourth gears are made with wider drive...Precise engineering provides great longevityPeak accuracy and effectiveness$190.03
- Andrews Products®Transmission Gear (201105)Transmission Gear (201105) by Andrews Products®. Gear Stage: 1. Best choice for Superglides, Choppers and lighter bikes with stock or smaller motor or transmission sprocket. This is a no clunk 48 mph, first gear. Gear Stage: 2,24....Precise engineering provides great longevityPeak accuracy and effectiveness$150.92
- Andrews Products®Transmission Gear (201145)Transmission Gear (201145) by Andrews Products®. Gear Stage: 1. This ratio works best on E glides and heavier bikes with motor or transmission sprockets having more teeth than stock sprockets. Gear Stage: 2,6. Transmission gears are...Precise engineering provides great longevityPeak accuracy and effectiveness$150.92
- Andrews Products®Transmission Gear (202160)Transmission Gear (202160) by Andrews Products®. Gear Stage: 2. Stock 2nd gear with drive slots include lead in ramps for more positive 1-2 shifts. 1.82 Ratio/21 Tooth Stock second gear with drive slots includes lead in ramps for more...Precise engineering provides great longevityPeak accuracy and effectiveness$79.57
- Andrews Products®Transmission Gear Kit (296220)Transmission Gear Kit (296220) by Andrews Products®. Gear Tooth Count: 23. All speed gears are made from high nickel alloy and heat treated and shot-peened to give maximum durability and strength. Also, where applicable, lead-in ramps...Precise engineering provides great longevityPeak accuracy and effectiveness$93.03
- Andrews Products®Transmission Gear Kit (210550)Transmission Gear Kit by Andrews Products®. Transmission gears are made from high nickel alloy steel which is heat-treated and shot peened for maximum durability. Shot peening greatly improves the wear resistance of drive edges and...Precise engineering provides great longevityPeak accuracy and effectiveness$711.66
- Andrews Products®Transmission Gear Kit (210450)Transmission Gear Kit (210450) by Andrews Products®. Gears Ratio: 1st 2.60 / 2nd 1.23. Transmission gears are made from high nickel alloy steel which is heat-treated and shot peened for maximum durability. Shot peening greatly improves...Precise engineering provides great longevityPeak accuracy and effectiveness$711.66
- Andrews Products®Transmission Gear Kit (210150)Transmission Gear Kit (210150) by Andrews Products®. Gears Ratio: 1st 2.44 / 2nd 1.35. Transmission gears are made from high nickel alloy steel which is heat-treated and shot peened for maximum durability. Shot peening greatly improves...Precise engineering provides great longevityPeak accuracy and effectiveness$711.66
- Andrews Products®Transmission Main Belt Drive Gear (296585)Transmission Main Belt Drive Gear (296585) by Andrews Products®. Gear Tooth Count: 32. All speed gears are made from high nickel alloy and heat treated and shot-peened to give maximum durability and strength. Also, where applicable,...Precise engineering provides great longevityPeak accuracy and effectiveness$217.98
- Andrews Products®Transmission Main Belt Drive Gear (296555)Transmission Main Belt Drive Gear (296555) by Andrews Products®. Gear Tooth Count: 17. All speed gears are made from high nickel alloy and heat treated and shot-peened to give maximum durability and strength. Also, where applicable,...Precise engineering provides great longevityPeak accuracy and effectiveness$50.27
The majority of modern motorcycles use manual sequential gearboxes with five or six gears. “Sequential” means that the rider cannot select any gear any time. He or she has to pull up a shifting lever to select one gear higher or press it down to change gear from higher to lower in strict order. As standard, the shifting lever is positioned on the lower left side of the bike to be operated by the rider’s left foot. A clutch lever is located over the left grip so that the rider can operate the bike without taking his or her hand off the handlebars.
In a traditional “1 down 4 up” or “1 down 5 up” scheme, the neutral gear is positioned between the first and second gear because it makes the most sense. That way, by pushing the lever down several times, you know that you have reached the first gear and to put your bike in neutral, you have to pull the lever half a click up. From the neutral position, you can select the second gear when starting downhill. The construction of sequential motorcycle transmissions allows experienced riders to use the clutch only when starting from a complete stop while performing clutchless upshifting between higher gears.
Since the conventional manual gearbox with an H-pattern of shifting used in cars is too large to be fitted into a compact motorcycle frame, and shifting using hand lever on bikes is proved to be impractical, modern motorcycles use a compact “dog clutch” scheme where all of the gear teeth are always engaged. Some of the gears are connected to input and output shafts through splines but can shift from side to side. Some of them rotate freely. When the rider pushes the shift lever, it rotates the shift drum or barrel through a ratchet mechanism. The drum has grooves around its surface used to actuate shift forks.
As the drum rotates, these forks literally shift gears on transmission shafts to engage the needed gear pairs, thus the term ""shifting gears."" The engagement between freely rotating gears and those splined to the same shaft is performed through dog clutches. Some gears have pegs on their sides called “dogs.” They are designed to nest in corresponding recesses on adjacent sprockets. To complete the shift to an adjacent gear, you need to provide only a brief interruption of engine torque. A shift fork makes neighboring gears lock together and rotate as one. By pushing the shift lever up without clicking it, you can synchronize the rotation of two gears, which allows you to shift them after rolling off the throttle without disengaging the clutch and without causing damage to transmission components.
A smoothly running gearbox is essential for your success on the track or comfort on the road. If something goes wrong with the gears, you can tell with certainty that the problem is in the transmission. When it is time for repairs or upgrade, visit our online store and browse the catalog of motorcycle transmissions and components where we’ve gathered only high-quality products made by some of the most reputable manufacturers in the industry. We offer high-performance gearboxes with additional overdrive gears. Some models feature rear gears, which is convenient if you own a heavy cruiser. Here you can find rebuild kits, replacement shafts, gear, shift forks, drums, transmission covers, and much more.
Featured Brands
Related Categories
Drive Chains
Sprockets
Chain & Sprocket Kits
Drive Belts & Pulleys
Primary Chains & Belts
Clutches
Variators
Driveshaft
Axles & Accessories
Wheel Hubs
Chain Guide, Protection & Sliders
Sprocket Guards
Transmission Covers
Chain & Belt Adjusters
Primary Chain & Belt Tensioners
Transmission Sensors & Switches
Clutch Lines
Transmission Gaskets, Seals & Bushings
Drivetrain & Transmission Bearings
Drivetrain & Transmission Mounts
Engine & Transmission Custom Covers
Drive Belt & Drive Shaft Covers
Chain Lubes & Cleaners
Transmission Fluids & Oils
Gear Oils
Greases
Drivetrain & Transmission Tools