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Reprogrammed V3 CDI unit - 4PERF - 9 Curves - Motocross (250cc/300cc)
Why you're going to love it!
- 4PERF©: Official Manufacturing and Distribution
- CDI reprogramming with choice of ignition curve from 1 to 9, with selection saving
- A boost of +5300 RPM and guaranteed torque gain for your Motocross.
- Tested and designed for CRZ ERZ PRO 250cc/300cc Motocross
- The best reprogrammed CDI on the market - Official Manufacturing CDI V3©
- Warning: beware of copies ;-)
Reprogrammed CDI Box V3 - 4PERF - 9 Maps - Motocross
You were waiting for it, it is finally here: the CDI Box V3 4Perf for motocross series ERZ 250cc Pro and ERZ 300cc Pro. Specially designed and reprogrammed by 4Perf, this box revolutionizes the way you ride your motocross.
Features:
- Complete Reprogramming: The CDI Box V3 offers 9 configurable maps, allowing precise adaptation to different riding conditions.
- Ignition Curve Backup: Enjoy an ignition curve backup up to +5300 RPM, ensuring optimal performance at high revs.
- Connector Type: The box is equipped with a double terminal connector, ensuring a secure and reliable connection with your motocross.
Improved Performance:
Transform your motocross performance with the Reprogrammed CDI Box V3 4Perf. Although its appearance is ordinary, it outperforms standard CDI models and other replicas, increasing your dirt bike's engine speed by up to 5300 additional RPM.
Performance Curves:
The 9 available performance curves are as follows:
- 1st: 2900 rpm
- 2nd: 3200 rpm
- 3rd: 3400 rpm
- 4th: 3800 rpm
- 5th: 4000 rpm
- 6th: 4400 rpm
- 7th: 4800 rpm
- 8th: 4900 rpm
- 9th: 5300 rpm
Optimize your motocross performance and experience unparalleled riding with the 4Perf Reprogrammed V3 CDI box. Don't wait any longer to improve your riding experience and get the most out of your machine!

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.
Motorization
| Engine Type | 250cc ZONGSHEN Single-cylinder 4-Stroke
ZONGSHEN 300cc Single Cylinder, 4 Stroke, 2 Valves, Air Cooling |
|---|---|
| Engine Capacity | 250cc, 300cc |
| Motorization | Thermal (gasoline) |
| Horizontal/Vertical Motor | Vertical |
|---|---|
| 4 Stroke / 2 Stroke | 4 Stroke |
| Number of Pins | 2 Pins |
Others
| Color | Yellow/Gold |
|---|---|
| Vintage | 2025 |
| Type of bike | Motocross |
| Performance | Racing |
|---|---|
| Shipping origin | France |
Questions about Reprogrammed V3 CDI unit - 4PERF - 9 Curves - Motocross (250cc/300cc) (42)
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Bonjour va t il sur la 250 erz 2 temps ?merci
Question from Riat D., on
Answer from the Mini MX team
Bonjour,
non le cdi ne convient pas pour la 2temps
Questions asked in other languages
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Bonjour j’ai vue qu’il ce monter sur le 250 mmx big s , faut t’il changer de carbu pour passer sur un 30 ? ou changer le gicleur est suffisant ? Merci de votre réponse
FR Question from Thimoty, on
Answer from the Mini MX team
Bonjour, un réglage carburateur sera bien à effectuer avec un allumage racing.
-
bonjour , se monte sur une bigR 300 sans modife ? merci
FR Question from Lemaitre J., on
Answer from the Mini MX team
Bonjour,
oui le CDI est compatible -
Es que il et compatible avec le 450 ERZ R
FR Question from Beaumont T., on
Answer from the Mini MX team
Bonjour, non pas compatible.
-
Bonjour , pour le 250 big s si je le monte dessus faut t’il que j’augmente le carbu ( c’est un 28 d’origine ) merci
FR Question from Poulain J., on
Answer from the Mini MX team
Bonjour, oui un réglage carburation sera à effectuer.
-
Bonjour ce monte sur 250 big s merci
FR Question from Bouclet G., on
Answer from the Mini MX team
Bonjour, oui compatible.
-
Bonjour combien de CV pouvons nous gagné grâce a ce CDI ?
FR Question from Namur T., on
Answer from the Mini MX team
Bonjour,
Il a 9 courbes les gains sont notable en allonge et couple en fonction du choix de votre programme. -
Bonjour, cela serais compatibles avec ma crz erz 250cc pro 19/21 acheter en janvier 2026. Il me semble que ma version et une 2025, donc j'ai un doute. Merci à vous
FR Question from Folcher B., on
Answer from the Mini MX team
Bonjour, oui compatible.
-
Esque c’est compatible avec une 300big r mmx
FR Question from Renaux C., on
Answer from the Mini MX team
Bonjour, oui compatible.
-
Bonjour, compatible 250 erz pro 2022 ?
FR Question from Ferrer D., on
Answer from the Mini MX team
Bonjour, non pas compatible.
-
compatible avec la 300 ERZ S
FR Question from Mathis, on
Answer from the Mini MX team
Bonjour, oui compatible.
-
Bonjour je risque pas abîmer le moteur et quand c'est disponible ?
FR Question from Lefebvre, on
Answer from the Mini MX team
Bonjour, un réglage carburation est as effectuer lors d'un remplacement de CDI racing.
-
Bonjour est-il compatible sur la Erz 300cc liquide car l’autre était en rupture de stock ?
FR Question from Macé R., on
Answer from the Mini MX team
Bonjour, non pas compatible.
-
Bonjour est'il compatbile avec le 150cc vertical zongshen? merci
FR Question from Frappé R., on
Answer from the Mini MX team
Bonjour, non pas compatible.
-
Bonjour le boîtier cdi et t’il compatible avec une 250 Cc smx et apporte t’il réellement une bonne amélioration merci d’avance
FR Question from Fabrice B., on
Answer from the Mini MX team
Bonjour, nous ne connaissons pas les produits compatible pour les modèles vendu de chez SMX.
-
Bonjour est ce que le CDI est compatible sur la CRZ ERZ - 300cc PRO S ?
FR Question from Teroin J., on
Answer from the Mini MX team
Bonjour, oui ceci est indiqué sur la fiche produit.
-
Bonjour ce CDI est il compatible avec le moteur 300 yx a air
FR Question from Luka B., on
Answer from the Mini MX team
Bonjour, compatible uniquement avec les modèles CRZ 250/300cc pro moteur Zongshen
-
Bonjour se monte t il en remplacement de celui d'origine et sans adaptation ni réglage?
FR Question from Mangiavillano L., on
Answer from the Mini MX team
Bonjour, oui en remplacement du CDI d'origine pour modèle 250/300cc pro.
-
BONJOUR COMPATIBLE AVEC MOTEUR ZONGSHEN 300CC 4 SOUPAPEMERCI
FR Question from Marc D., on
Answer from the Mini MX team
Bonjour, non pas compatible, modèle compatible ref: P2155-2
-
Bonjour, compatible pour zongshen 190cc ?
FR Question from Salieti J., on
Answer from the Mini MX team
Bonjour, non compatible uniquement pour modèle erz 250/300cc pro comme indiqué sur la fiche produit.
See the 42 questions about this product
Can't find the answer to your question?
8 other products in the same category:
4Perf Reprogrammed V2 CDI Unit (+2000 rpm)
Why you're going to love it!
- 4PERF©: Official Manufacturing and Distribution
- CDI reprogramming with choice of ignition curve from 1 to 9, with selection saving
- A boost of +5300 RPM and guaranteed torque gain for your Motocross.
- Tested and designed for CRZ ERZ PRO 250cc/300cc Motocross
- The best reprogrammed CDI on the market - Official Manufacturing CDI V3©
- Warning: beware of copies ;-)
Thanks!
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