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| Specification | Technical details |
| Product type | Gearbox output gear (secondary transmission) |
| Mark | Tm kart (Original TM Racing Genuine Parts) |
| Sizes / Tettle | Available from 14 to 20 teeth (Selection from the drop-down menu) |
| Chain | 428 (Standard Karting 125cc with gearbox) |
| Material & Treatment | Cemented steel and tempered high mechanical strength |
| Motor compatibility | Tm kart : All KZ engines (K8, K9, K9B, K9C, KZ10, KZ10B, KZ10C, KZ-R1, KZ-R2, Kz-r3) |
Adjust the transmission of your karting with a millimeter precision thanks to the tM KART official box output gear. Mistress of the secondary transmission of your 125CC gearbox engine, this gear is installed directly on the box output shaft to drive the string to the rear crown.
Machined in high quality carbon steel and then subjected to heavy thermal cementation, this original gear resists traction constraints, transmission shocks when changes in reports on the fly and premature wear. Its teeth cutting at 428 guarantees ultra-fluid chain flow, limiting friction losses and ensuring you from 100% of the engine torque to the track.
Available in a wide range of teeth (from 14 to 20 teeth), it allows you to ideally calibrate your demultiplication according to the characteristics of each circuit (winding track requiring racking or quick drawing requiring high peak speed).
* "Hi the kings of the Braquet! The box output gear on a TM, it's the key element to set your transmission according to the plot. But be careful, with the KZ engines that send a potato of hell, this pinion takes a colossal load with each realer. !
My stand trick for the maintenance and choice of your TM pinion: laser alignment, hot lubrication and nine circlips !
When you change a pinion to adapt your transmission report, always inspect the condition of the teeth. If you see that the teeth form 'hooks' or are remaining like knife blades, change it direct with the chain! A worn gear destroys a new string in 2 sessions.
Reassembly on the secondary tree:
Check that the bearing washer and grooves of the tree are clean and greased.
Make sure you use a circlips / Stop clips in perfect condition to lock the pinion on the shaft.
Align your gear perfectly with the rear crown using a laser alignment tool. A bad alignment causes the string chain and can break the motor housing! "*
Loosen the engine support or chain tensioner and remove the transmission chain from the box output gear.
Using a suitable circlip clamp, remove the stop clip on the end of the secondary shaft. Extract the old pinion and his washer.
Follow the trick in Michel: Clean the flutes of the tree. Slide the original TM kart pinion (selected size from 14 to 20 teeth) on the secondary shaft and imperatively lock with a new circlip.
Replace the NO 428 string, align the pinion with the rear crown, adjust the string voltage and block your engine. You are ready to make the chrono talk !
Q: How to choose between a pinion of 14, 15, 16, 17, 18, 19 or 20 teeth ?
A:
Less teeth (eg 14 or 15 teeth): Shortens the transmission. You earn in acceleration, recovery and slowly outflow, but reduce advanced speed.
More teeth (eg 18, 19 or 20 teeth): Extends transmission. Ideal for large fast circuits with long straight lines to maximize maximum speed.
Q: Is this pinion compatible with all TM kart engines with gearbox ?
A: Yes, the grooves of the box output tree are standard on all 125cc KZ engine generations at TM Kart (K8, K9, K9B, K9C, KZ10, KZ10B, KZ10C, KZ-R1, KZ-R2 and KZ-R3).
Q: What is the chain step used by this pinion ?
A: This original sprocket is machined in step 428, the universal standard for the secondary transmission of 125cc gearbox karts (Kz).
Clutch Rotax 14.6 mm - Special DD2 - for karting engines Rotax Max
This clutch Rotax 14.6 mm is specially designed for engines Rotax Max DD2, known for their two-speed transmission and their chain-free architecture. Essential part of the transmission system, it ensures a progressive, regular and perfectly controlled commitment, ensuring constant performance tower after turn, whether in competition or in intensive use on leisure track.
Designed according to the strict standards of RotaxThis clutch provides irreproachable machining accuracy and exceptional resistance to high temperatures generated during acceleration and reporting phases. Its internal design optimizes power transfer to ensure immediate motor skating without excessive skating, while preserving the longevity of the engine and surrounding components.
Thanks to its specific diameter of 14.6 mmIt ensures a perfect fit on DD2 dedicated trees and guarantees stable operation even under extreme conditions. This model is ideal for maintaining a mechanical consistency in stopped departures, violent re-accelerations output from turn or during long training sessions.
This clutch is also appreciated for its reliability and ease of maintenance. It helps preserve the two-speed box from the DD2 by avoiding the jolts and departing the load variations, which results in better track behavior and increased durability of the transmission assembly.
Discover the KZ BSS 2015 or 950 Neos or BSM4 OTK front brake pad at MagicKart. Designed for optimum braking performance and durability, this pad is compatible with KZ kart front brakes and cadet chassis rear brakes.
The Set of 4 Komet K3H tires is the official choice of competitions Iame Series France Since 2024 for categories X30 Junior and KA100. Direct evolution of the famous K2H, the K3H repels the limits of the performance by offering a wider range of use and constant thermal stability even in the longest finals. This complete train (2 front tires + 2 rear tires) is designed for demanding drivers who do not want any compromises between Grip and durability.
The LECONT LOH tyre is a must choice for demanding karting drivers. Approved from 2024 to 2026 in the KZ category, this tire is manufactured in Italy by Lecont, a company recognized for its quality and expertise in the production of competitive tires.
The Special bridle rear bumper Ø30mm aluminum cobra is designed for Hold your bumper firmly during karting races, even in case of violent shocks with your opponents. Made in High strength aluminum, this flange offers a Robust and light solutionideal for Protect your kart Without weighing your chassis.
The clutch disc (marker)9on the broken view) is an original high performance friction partTM Kart. Designed to withstand the extreme temperatures and enormous torque constraints of the 125cc gearbox (KZ) engines, it ensures a perfect connection between your engine and the gearbox. Its specific trim is designed to offer a progression at the start while guaranteeing an immediate grip as soon as the pedal is released.
TheOil Motul 2T Grand Prix for Kart is a high-end synthetic lubricant specially formulated for two-stroke karting engines. This oil offers optimal protection and increased performance, ensuring long-lasting lubrication and reduced wear, even under the most demanding running conditions.
Discover the Iame KA100 engine at MagickArt. Made by Iame, this engine offers optimal performance and increased durability. Used in the race with a Chassis Charles Leclerc.
Adjust the transmission of your karting with a millimeter precision thanks to the TM KART official box output gear. Mistress of the secondary transmission of your 125CC gearbox engine, this gear is installed directly on the box output shaft to drive the string to the rear crown.
Machined in high quality carbon steel and then subjected to heavy thermal cementation, this original gear resists traction constraints, transmission shocks when changes in reports on the fly and premature wear. Its teeth cutting at 428 guarantees ultra-fluid chain flow, limiting friction losses and ensuring you from 100% of the engine torque to the track.
Available in a wide range of teeth (from 14 to 20 teeth), it allows you to ideally calibrate your demultiplication according to the characteristics of each circuit (winding track requiring racking or quick drawing requiring high peak speed).
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