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Why you're going to love it!
420 pitch sprocket with 37, 39, 41, or 43 teeth options for Dirt Bike, Pit Bike
This sprocket is compatible with all types of Dirt Bike and Pit Bike engines!
420 Sprocket for Dirt Bike, Pit bike
Diameter: 76mm
Mounting Center Distance: 90mm
Chain Pitch: 420
Number of Teeth: 37, 39, 41, 43 (optional)
Note: arrival without screws
Gray or black depending on arrival
Reminder:
Chain pitch 420 = approximately 6mm
Chain pitch 428 = approximately 7mm
Advice:
If you lengthen your transmission, you will gain top speed but lose engine torque/responsiveness.
If you shorten your transmission, you will gain torque and lose top speed.
For more information, download the full explanation for free in the "Mini MX Tips" tab.

Anodized sprocket screws compatible


La transmission
How to know the size of chain, sprocket, crown Dirt Bike, Pit Bike?
Download (712.15KB)Our motorcycles, quads, pocket bikes, etc., are not approved for use on public roads. Their use is strictly limited to closed, private tracks that comply with the provisions of Article R 331-21 of the French Sports Code.
Our vehicles (motorcycles, quads, buggies, etc.) intended for children should not be considered mere toys, but motorized machines belonging to the realm of motorsports, which involve inherent risks.
Minors under the age of 14 are not authorized to purchase, rent, or use non-approved vehicles, such as mini-motorcycles, children's quads, unapproved quads, motocross bikes, pocket bikes, pocket cross bikes, pit bikes, or dirt bikes. Their use is strictly limited to activities organized by approved sports associations, such as the FFM (French Motorcycling Federation) or UFOLEP (French Union of Secular Sports and Cultural Activities). It is important to note that the maximum speed of these vehicles on public roads is 24 km/h, which prohibits their use on public roads. Furthermore, minors under 16 years of age must be constantly supervised by an adult when using these machines.
To ensure your safety, it is essential to wear appropriate protective equipment, including an approved safety helmet, motocross-type safety glasses, gloves, elbow pads, knee pads, and a chest protector. It is also recommended to wear a long-sleeved top, long trousers, and high-top shoes that cover at least the ankle, ensuring that the laces are securely tied and away from the wheels, engine, and drive system.
You must register your machine with the Ministry of the Interior within 15 days of the purchase date. This process can be completed online at the following address: https://www.service-public.fr/particuliers/vosdroits/R20458. After submitting the declaration, you will receive an identification number to be engraved on the chassis and displayed on a visible plate. Please note that this plate can be removed during sporting activities.
We also encourage you to consult the charter outlining the rules to be followed for the use of your vehicle, available here: https://www.legifrance.gouv.fr/loda/id/JORFTEXT000020910287/, or to refer to the user manual, which you can download.
Chain and Drive
| Chain Size | 420 |
|---|---|
| Interaxis Fixation Crown | 76mm |
| Number of teeth Crown | 37 Teeth, 39 Teeth, 41 Teeth, 43 Teeth |
|---|
Others
| Color | Noir |
|---|---|
| Brand | Mini MX |
| Type of bike | Dirt Bike, Pit Bike |
|---|---|
| Shipping origin | France |
Questions about Standard 420 Steel Sprocket (37, 39, 41, 43 teeth) (4)
Questions asked in other languages
-
Bonjour,Est ce que la couronne est compatible avec appolo rfz 150 grande roue ?Si oui quel type de change me faut t il ?Cordialement
FR Question from Stephane, on
Answer from the Mini MX team
Bonjour, compatible pour diamètre moyeu 76mm entraxe de fixation 90mm.
-
Buonasera. Mi serve la corona originale ma di 41 denti per la honda CBR1000RR del 2006, mi mandate il link per acquistare? Grazie
IT Question from Alfonso S., on
Answer from the Mini MX team
Ciao :)
allora non facciamo ricambi per moto di strada purtroppo mi dispiace -
Les vis sont fournis ?
FR Question from Romagosa Q., on
Answer from the Mini MX team
Bonjour,
Non les vis ne sont pas fournies : https://www.minimx.fr/fr/vis-et-visserie-generale-pour-dirt-bike-pit-bike/795-kit-de-4-vis-pour-couronne-dirt-bike.html -
bonjours quand on reduit les dent de la couronne on gagne pas le vitesse ? mercije veut augmenter mon pignon et baisser ma couronne pour gagner de la vitesse merci
FR Question from Coquelet R., on
Answer from the Mini MX team
Bonjour,
diviser le nombre de dent au pignon par celui de la couronne.
Couple= entre 0,30 et 0,34
Vitesse de pointe = au dela de 0,34.
Cordialement,
MINI MX
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Why you're going to love it!
420 pitch sprocket with 37, 39, 41, or 43 teeth options for Dirt Bike, Pit Bike
This sprocket is compatible with all types of Dirt Bike and Pit Bike engines!
Thanks!
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