Skip to product information
1 of 4

GOOFIT

5-Pin AC CDI Box for Chinese 50cc–125cc ATV Pit Bike Dirt Bike

5-Pin AC CDI Box for Chinese 50cc–125cc ATV Pit Bike Dirt Bike

33 total reviews

Regular price $13.99
Regular price Sale price $13.99
Sale Sold out
Shipping calculated at checkout.
Quantity

Product Overview

Restore stable ignition performance with this 5-pin AC CDI box, designed for many Chinese 50cc, 70cc, 90cc, 110cc, and 125cc horizontal engine ATVs, pit bikes, dirt bikes, mini bikes, and pocket bikes.

The CDI unit controls ignition timing and spark output, helping the engine start more reliably and run more smoothly when the original CDI is weak, damaged, or failing. It is a practical replacement for common ignition-related problems such as no spark, hard starting, intermittent shutdown, rough running, or poor throttle response.

Built with a weather-resistant housing, this CDI box is designed to handle normal vibration, dust, and moisture exposure found in off-road riding conditions. The 5-pin AC design makes it suitable for compatible Chinese horizontal engine ignition systems used on brands and models such as SSR, TaoTao, X15, X18, 3125B, 3125R, and 3125XR8.

Product Compatibility

Vehicle / Engine Type Engine Size Fitment Notes
Chinese ATV 50cc–125cc Must use 5-pin AC CDI
Pit Bike 50cc–125cc For horizontal engine applications
Dirt Bike 50cc–125cc Check plug shape and pin layout
Mini Bike 50cc–125cc Compare original CDI before purchase
Pocket Bike 50cc–125cc Compatible with select AC ignition systems

Common Compatible Models / Brands

Brand / Model Notes
SSR Select 50cc–125cc horizontal engine models
TaoTao Select ATV, pit bike, and dirt bike applications
X15 / X18 Compatible with select Chinese pit bike setups
3125B / 3125R / 3125XR8 Fits select 125cc horizontal engine models
Chinese Horizontal Engine Vehicles 50cc, 70cc, 90cc, 110cc, 125cc AC ignition systems

Specifications

Specification Details
Product Type CDI Box / Ignition Control Unit
CDI Type AC CDI
Pin Count 5 Pin
Engine Compatibility 50cc, 70cc, 90cc, 110cc, 125cc
Engine Style Horizontal Engine
Vehicle Applications ATV, Pit Bike, Dirt Bike, Mini Bike, Pocket Bike
Housing Weather-Resistant Protective Housing
Protection Dust, Moisture & Vibration Resistant
Installation Type Direct Replacement, fitment confirmation required
Condition Brand New

Key Features

5-Pin AC CDI Replacement

Designed for compatible Chinese horizontal engine ignition systems using a 5-pin AC CDI configuration.

Fits 50cc–125cc Horizontal Engines

Works with many 50cc, 70cc, 90cc, 110cc, and 125cc Chinese ATVs, pit bikes, dirt bikes, mini bikes, and pocket bikes.

Supports Stable Ignition Output

Helps control ignition timing and spark signal for smoother starting, more stable running, and improved throttle response.

Weather-Resistant Housing

Made with protective materials to help resist dust, moisture, and vibration during normal off-road and recreational riding.

Practical Fix for Ignition Problems

A useful replacement part when diagnosing no-spark issues, hard starting, rough idle, intermittent stalling, or weak ignition performance.

View full details
  • 5 stars: 27 (82%)
  • 4 stars: 6 (18%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
J
Joshua Jenkins
50cc chinese four wheeler Model HS1P39FMB

Perfect fit! Old CDI Box would kill four wheeler when hitting bumps. Checked for electrical shorts but there was was none. Dialed it to the 5 pin CDI box. Replaced CDI box four wheeler stopped dieing randomly over bumps.

N
No
Four Stars

Bought these for my go kart and dirt bikes works ok

J
Jake
Five Stars

Worked great on my SSR 125

R
Roberto
Great buy

Great price, works just like it should. Plug and play

A
Alyssa
Five Stars

The ATV is repaired.

C
Charles Esquibel
Works on a Coolster 3125XR8

Installed on my son's Coolster 3125-XR8 ATV after the stock CDI box failed. I now keep a couple of spares on hand since these are cheap, easy to replace and clearly prone to failure.

N
NO LA GARANTIZO SOLO ME DURO 2 HORAS EN UN TERRENO NO DIFICIL 0 ESTRELLAS
Didn't work for my atv but might for yours.

Wrong connectors so it may just be a mistake on my end. Make work for yours.

I
Israel
Five Stars

Good quality

D
Daniel
Excellent part

Perfect to replace the factory cdi and adds 5 to 10 moh depending on weight of rider

J
J. Davis
Five Stars

Great product

P
Patrick Lepage
Replaced CDI in Buddy 50cc

I replaced the CDI in my buddy 50cc and it is working fine.

m
may
Shipped fast

As described

P
Peter Weber
Budget king says get it

Simple to replace price is right nothing else you can say about this product

t
tmed007
70cc Baja

Works perfect on my 70cc Baja dirt bike very happy

C
Chris Basile
Cheap price

Good

J
Jennifer Evans
Perfect fit

Works perfectly

r
rich
Works like the original

Fast delivery. Works like the original. I am totally satisfied.

S
Suzana Paulo
Second one lasted

Works fine. Had to return the first one lasted for only 20 minutes. For around $5 it hard to be upset

m
madeline Singleton
Perfect

Works as expected

J
Josh
Great

Does the job

m
maryjane911
Buy it!

Worked like a charm! Plugged it in and the bike started right up!

D
Derrek Howard
Good and fast

As good as described

R
Rick
Worked

Worked

9
905pocketbikes
Works for G1 Golf Cart w/mod

Bought to modify for use on an 83’ Yamaha G1 Golf Cart. Not only works great, but runs better than stock! Bought a spare, but haven’t needed it, works great

D
Daniel bright
Great

Worked great for me in rewiring for 1982 Yamaha gas golf cart

K
Keith Bleeker
Will run a atc185 Honda pre 1985

Plugged right in to Honda ATC185 (1981) and starts first pull will report back how long it lasts

s
soooblessed
Works on tao tao

Works like an oem cdi box for my tao tao db17

D
Darrel Bogdanek
Perfected Fit...

Nice performance... fit perfect for a 110cc Chinese kids atv...

D
Darrel Morris
worked great.

Accurate description, worked great.

d
dany b.
Love it

Makes it fire.no problems

s
shamo
Four Stars

great would buy again

L
Lisa Eaton
Five Stars

Perfect

k
kelly nolen
Four Stars

go it runnning