what does a cdi box do

What Does A CDI Box Do: What Are The Things You Need To Know?

Learning the functions of CDI box could be a lot easier. In fact, you are not required to be a professional one just to know about its functions. There are just important things you need to know about.

What Is CDI Box?

A CDI or capacitor discharge ignition that is found on most bikes is linked to the ignition where it mainly stores the electrical charge. It is responsible for increasing the spark’s power in the spark plug. CDI box can be found only on vehicles that are based on the gasoline engine. It was originally developed in order to overcome the long charging times, which are associated with the high inductance coils mainly utilized in IDI system or inductive discharge ignition, thus making the ignition even more suitable especially for the high engine speeds.

What Does A CDI Box Do?

Bestseller No. 1
CDI Box fit for Polaris Sportsman 500 1996-2002,for Polaris Big Boss Magnum Worker Ranger 500 ATV with Ignition Coil&Starter Solenoid Relay Spark Plug
  • CDI box for Polaris Sportsman 500 1996-2001
  • CDI box for Polaris Sportsman 500 6X6 2000-2002
  • CDI box for Polaris Big Boss 500 6X6 1998-2000
  • Replace Parts Number: 3085639 3084691 3086982 3085564 3085382
  • Package Include: 1 x Ignition Coil, 1 x CDI Box, 1 x Spark Plug, 1x Starter Solenoid Relay
Bestseller No. 2
6 Pin DC CDI Box for 150cc 200 cc 250 cc Roketa Taotao Jonway Mopeds Scooters Go Karts Dune Buggy Parts
  • Fit for GY6 125cc 150cc 200cc 250cc Can Am DS 90 Roketa gk13b Carter GTR 250 Trailmaster 150  E-TON Viper 150R Arctic Cat 90 ATV 4 Wheeler Quad Go Kart
  • CDI is made of high-quality plastic and metal, which is easy to install and has a long service life
  • Length: 75mm/2.95"; Width: 42mm/1.65"
  • Its working principle is that the high-voltage electricity from the generator coil passes through the electronic igniter, then through the high-voltage package, and then through the spark plug to complete the ignition process
  • Please carefully check the model and size of the product before purchase
Bestseller No. 3
ElectroSport Performance CDI for 03-04 Suzuki LTZ400
  • This PROCOM Performance CDI increases the rev limit by 1,000 RPM over the stock rev limit (and 500 RPM over stock in reverse, for those models which have it).
  • In addition, this unit offers a re-mapped timing curve which yields a noticeable increase to horsepower and torque over the stock CDI.This CDI box is a direct plug-in replacement CDI.Simply locate and remove the stock CDI, and plug the Procom unit directl
Bestseller No. 4
5 Pin AC CDI Box Compatible with COOLSTER 125cc 3125B 3125R 3125XR8 SSR Dirt Bike Chinese 50c 70c 90cc 110cc 125cc ATV Quad Go Kart Pit Dirt Bike
  • 5 Pins Male Plug/ Type: AC Fired CDI/CDI Dimension: 64mm x37mm x 21mm (L x W x H)
  • This AC CDI Fit COOLSTER 125cc 3125B 3125R 3125XR8 SSR Dirt Bike Chinese 50c 70c 90cc 110cc 125cc Tao Tao ATV Pit X15 X18 Mini Pocket Bike Horizontal Engine
  • The 5 Pins CDI NOT have a rev limiter, Easy to install, small enough to strap where its supposed to go
  • This is AC CDI, Which is smaller than the DC CDI While the appearance is just same only size different
Bestseller No. 5
GOOFIT 6-pin AC CDI Box for CG 125cc 150cc 200cc 250cc Vertical Engine ATV Dirt Bike Go Kart
  • AC unit,6 Pin male plug CDI
  • Fit for CG 125cc 150cc 200cc 250cc ATV dirt bike go kart,
  • Attention:does not for GY6 or horizontal engine
  • Unlimited CDI adopt high quality plastic and metal,Professional manufacturing facilitating installation,Owning long service life
  • Warranty:We are always available to help our customers.If you are not satisfied with the order,please leave us a message.Wish you have a happy shopping experience,we are committed to providing the best service
Bestseller No. 6
HIAORS 6 Pin AC CDI BOX for GY6 50cc 125cc 150cc ATV Taotao Roketa Sunl Lance Scooter Moped Go Kart 4 Wheeler Quad Bikes Parts
  • 6 Pin Round Connector
  • AC Fired CDI
  • 6 Pin AC CDI BOX for GY6 50cc 125cc 150cc ATV Taotao Roketa Sunl Lance Scooter Moped Go Kart 4 Wheeler Quad Bikes
Bestseller No. 7
Trkimal High Performance Racing AC Cdi Box 6pin + Ignition Coil + 3 Electrode Spark Plug for GY6 50cc 80cc 125cc 150cc Moped Scooter ATV Go Kart
  • 【Specification】High performance racing cdi & ignition coil, racing 3 electrode spark plug, red color, cdi is AC fired, 6 pin
  • 【Fitment】 139QMB 152QMI 157QMJ engine, GY6 50cc 80cc 125cc 150cc Moped Scooter ATV Go Kart
  • 【Quality Guarantee】1 years quality warranty promised after you purchased
Bestseller No. 8
MOTO1988 Ignition Coil Spark Plug CDI Box Compatible with Polaris 2010-2014 Ranger 400 Polaris 2004-2009 Ranger 500 Polaris 2005&2009-2014 Sportsman 400 Polaris 2004-2008 Sportsman 500 OEM 3089238
  • Applicable Model:Ignition Coil and igniter CDI Box & Spark Plug For Polaris RANGER 500 2004-2009 RANGER 400 2010-2014 SPORTSMAN 400 HO 4x4 2009-2014 SPORTSMAN 500 6x6 2004-2008 HAWKEYE 400 HO 2X4 2011-2014.
  • OEM and Package: OEM Part Number are 3089238 and 3089239. If you choose to purchase our Ignition Coil Spark Plug CDI Box for Polaris RANGER 500 400, you will receive the following: 1 x Ignition Coil, 1 x Spark Plug, 1 x CDI.
  • High quality: All components in our ignition coil kit are tested and quality controlled before shipment, so you can use it with confidence. Our products are fully compatible with applicable models and can be installed directly without any modification. Our ignition coil is made of high-quality materials, quality assurance, safe and durable.
  • Tips before Purchase: Please carefully check whether your model is applicable to our products before buying. You can refer to the applicable models, pictures and OEM numbers on our page to help you determine your choice.
  • After-Sales Service: If you have any questions about our products during the use and purchase process, you can contact us by email at any time, we will try our best to solve the problem for you, and we will provide comprehensive quality assurance for our products.
SaleBestseller No. 9
CNCMOTOK Ignition Coil 5-PIN CDI Box Solenoid 4-PIN Relay Voltage Regulator Spark Plug Kit for 50cc 70cc 90cc 110cc 125cc ATV Chinese Go Kart Dirt Bike Pit Bike TaoTao Moped Scooter
  • 100% brand new, Pretty easy to install and durable. Please check all the connectors with your stock ones carefully.
  • Package contain parts:Ignition Coil + 5 PINS CDI module + 4-pin Voltage Regulator Rectifier + Solenoid Relay + 3 electrode spark plug.The item Compatible with 50cc 70cc 90cc 110cc 125cc horizontal engine, Not Compatible with GY6 or CG engine.
  • 5 Pins CDI Box Compatible with Chinese Made 50cc 70cc 90cc 110cc 125cc 4-stroke Horizontal Engine ATV Go Karts Dirt Bikes Pit bike.
  • 12V 4-pin Voltage Regulator Rectifier Compatible with 50cc 70cc 90cc 110cc 125cc ATV Scooters Go Karts Quad 4 Wheelers Moped Dune Taotao Sunl Jonway Buggy Sandrail Roketa.
  • Starter Solenoid Relay Compatible with 50cc 70cc 110cc 150cc 250cc TaoTao Roketa Sunl Baja Kazuma Sunl Meerkat Falcon kinroad ATV. If you have any problems or need help, welcome to contact us before or after your purchase. We will do our best to help you to solve it.
Bestseller No. 10
CNCMOTOK CDI Box Ignition Coil 5 Pin Regulator Rectifier Relay Spark plug For Kazuma Meerkat 50cc Falcon 70cc 90cc 110cc Taotao Roketa Coolster 110CC ATV 3050B X15 X 18 R Nitro X19 SSR Pocket Bike
  • This kit include: 5 Pins CDI module + 4-Stroke 12V Coil + Starter Replay Solenoid + 4 PIN Regulator Set
  • Compatible with 50cc 70cc 90cc 110cc 125cc 140cc horizontal engine Bikes & Quads ATV Buggy's.
  • Package Includes:1 X Ignition Coil,1 X CDI BOX, 1 X Rectifier Regulator,1 X Starter Replay Solenoid, 1 X Spark plug
  • Please check all the connectors with your stock ones carefully before purchase.
  • Note: This kit set does not fit for GY6 or CG engine
Bestseller No. 11
Performance Racing 6 Pins AC CDI Box + Ignition Coil + Spark Plug for Gy6 150cc 125cc 50cc Scooter Moped ATV Go Karts
  • CDI Ignition Coil spark plug fit for Gy6 50cc 125cc 150cc Moped Scooter. CDI fit for the GY6 50cc, 125cc and 150cc 139QMB, 152QMI, 157QMJ based engines
  • Fit for GY6 50cc 125cc 150cc 4-stroke Engines Scooters, ATVs, Go Karts, Mopeds, Quad, Pit Bikes, Dirt Bikes,gy6 139qmb 152qmi 157qmj engines
  • For most motorcycle, atv, quad, scooter, go kart, moped, pit bike, dirt bike, racing bike and other bikes.
  • Suitable: Fits most Chinese brands motorcycles, such as TaoTao, Buyang, Roketa, Coolsport, NST, BMX, Kazuma, Sunl, AIM-EX, Baja, Panterra, Kymco, Carroll Stream Eagle etc and various unlisted makes/models.
  • Package including:1pc AC 6 pin CDI box+ 1pc high-quality ignition coil + 1pc 3 electrode spark plug
SaleBestseller No. 12
MaySpare 6 Pin AC CDI BOX for GY6 50cc 125cc 150cc ATV Taotao Roketa Sunl Lance Scooter Moped Go Kart
  • 6 Pin Round Connector/ Type: AC Fired CDI
  • Fit GY6 50cc 125cc 150cc ATV Taotao Roketa Sunl Lance Scooter Moped Go Kart 4 Wheeler Quad Bikes
  • NOT have a rev limiter, Easy to install, small enough to strap where its supposed to go
  • This is AC CDI, Which is smaller than the DC CDI While the appearance is just same only size different
Bestseller No. 13
RMSTATOR Replacement for High Performance CDI Box Yamaha YFM 400 Kodiak 2000 2001 | OEM Repl.# 5GH-85540-10-00
  • Our PeakRPM technology provides a more aggressive timing curve for increased throttle response.
  • Ride at full throttle with our application-specific CDI box that raises the rev limiter by 1000 RPM.
  • Enjoy fast & easy installation with our plug & play design and included dielectric connector grease.
  • OEM-grade electronic components and printed circuit boards for long-term reliability and performance
  • 90% of ignition issues are caused by a faulty stator. Check product details before buying this part.
Bestseller No. 14
CDI Box 6 pin Ignition Coil Spark plug Relay Voltage Regulator for GY6 150cc Engine Scooter Moped Part for Tomberlin Crossfire 150R Spiderbox American Sportworks 150 GTS 150cc Go karts
  • [Apply To] 150cc cdi racing performance kit for Tomberlin Crossfire 150R American Sportworks 150 GTS 150cc Go karts GY6 150cc Engine Scooter Moped Parts, compatible with 4 stroke GY6 50-150cc 125cc engine like ATV taotao kymco Scooter Moped
  • [Product Feature] 100% New High quality gy6 ignition coil set match up exactly with original equipment in perfect fitness, just replace and ride again, easy to install. The 150cc ignition coil can improve combustion efficiency, strengthen electrical performance. This gy6 ignition kit has higher quality components than others such as thicker copper wires - The gy6 ignition wires are made of all-copper, ensuring high-performance start-up
  • [Quality Warranty] 1pcs Ignition Coil + 1pcs Cdi + 1pcs Spark Plug + 1pcs Voltage Regulator + 1pcs Solenoid Relay - High quality 150cc ignition kit with competitive price, fast delivery and good service
  • [Note] The gy6 ignition repair kit is not sponsored or endorsed by, or affiliated with the brands it fit, including TaoTao, Buyang, Roketa, Coolsport, NST, BMX, Kazuma, Sunl, AIM-EX, Baja, Panterra, Kymco, Carroll Stream Eagle
  • This 150cc ignition kit for Tomberlin Crossfire 150R Spiderbox 150cc Go karts may also know as gy6 ignition coil, 150cc cdi box, 6 pin cdi, cdi box for 150cc, gy6 150 ignition coil, gy6 150cc cdi, gy6 cdi 150cc, 150cc cdi box, 150 scooter parts, 150cc gy6 parts, 150cc gy6 performance parts, 150cc ignition coil and cdi, 6 pin cdi box, 6 pin dc cdi, cdi box for 150cc scooter, 150cc cdi for gy6 4 stroke, 150cc cdi for taotao, 50cc ignition coil system, 150cc ignition kit
Bestseller No. 15
Ignitor CDI Box for Yamaha ATV GRIZZLY 80 2005-2008 RAPTOR 80 2002-2008 BADGER 80 YFM 80 1995-2001 4EM-85540-10-00
  • Fits the Following Models: TYAMAHA GRIZZLY 80 2005-2008 RAPTOR 80 2002-2008 BADGER 80 1995-2001.
  • OEM and Package: OEM Part Number is 4EM-85540-10-00; If you order our Igniter CDI Box for Yamaha YFM80, you will receive the following: 1 x Igniter CDI Box.
  • Important Note: Please be sure to unplug the battery cord before installation, and make sure that it is in the power-off position during installation. Ensure that all wires are kept away from heat sources and secured in place. Sometimes, electrical components such as your ignition coil and flywheel magneto need to be tested after installation to ensure their safety and performance.
  • Important Note: Please be sure to unplug the battery cord before installation, and make sure that it is in the power-off position during installation. Ensure that all wires are kept away from heat sources and secured in place. Sometimes, electrical components such as your ignition coil and flywheel magneto need to be tested after installation to ensure their safety and performance.
  • Tips before Purchase: Please carefully check whether your model is applicable to our products before buying. You can refer to the applicable models, pictures and OEM numbers on our page to help you determine your choice.
Bestseller No. 16
NewYall CDI Box Module for Polaris Sportsman 335 400 500 Magnum Ranger 425 500 Big Boss Xplorer 500 3084691
  • For Polaris Big Boss 500 1998-2000; Magnum 500,Sportsman 335 1999-2001; Ranger 425 2003
  • For Polaris Magnum 425 1995-1999; Scrambler 500 1997-2000; Sportsman 400 2001-2002
  • For Polaris Sportsman 500 1996-2001; Worker 335 500 1999; Xplorer 500 1997;
  • For Polaris Ranger 500 1999 2003 2004
Bestseller No. 17
CDI Box & Ignition Coil Spark plug For Yamaha Warrior 350 1997 1998 1999 2000 2001 348cc 3GD-85540-40-00
  • Compatible Models: For Yamaha Warrior 350 YFM350X 1997-2001.
  • Manufacturer Part Number: 3GD-85540-40-00
  • Replacement Part:3Gd-82310-10-00, 3Ns-82370-00-00
  • Package: 1 x CDI(5 PIN), 1 x Ignition Coil, 1 x Spark Plug
  • Tips before Purchase: Please carefully check whether your model is applicable to our products before buying. You can refer to the applicable models, pictures and OEM numbers on our page to help you determine your choice.
Bestseller No. 18
KEMIMOTO 30410-HM5-505 CDI Box Compatible with TRX300 TRX300FW TRX400 TRX 300 400 Fourtrax FW Foreman 1994-2003
  • CDI box fits   TRX300 Fourtrax  1994 1995 1996 1997
  • CDI box fits TRX300 Fourtrax FW 1994 1995 1996 1997
  • Fits TRX 300 400 Fourtrax Foreman 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003
  • Replace 30410-HM5-505 30410-HM5-671 30410-HM5-672 30410-HM5-670 New Z182
  • Note: Please make sure the images are the same with what you want!
Bestseller No. 19
Racing Ignition Coil 5 Pins AC CDI Box for GY6 4-Stroke 50cc 70cc 90cc 110cc 125cc 150cc Scooter ATV Go Kart Moped Quad Pit Dirt Bike With 3 Electrode Spark Plug
  • Compatible with GY6 50cc 70cc 90cc, 110cc, 125cc, 150cc 4-stroke engines. For most motorcycle, atv, quad, scooter, go kart, moped, pit bike, dirt bike, racing bike and other bikes.
  • Fit most Chinese Made Pit / Dirt bikes, almost all of the bike brands from China, such as Compatible with TaoTao, Buyang, Coolsport, Jonway, Znen, NST, BMX, Kazuma, Sunl, Roketa, AIM-EX etc.
  • Racing Ignition coil surface finish: plastic;Color: Orange;Overall length:19", comes triple electrode head Spark plug.and 5 Pins AC CdI Match original equipment exactly for a perfect fit, easy to install.
  • Package including 1 AC 5 Pins CDI box + 1 ignition coil + 1 spark plug
  • The product is not sponsored or endorsed by ,or affiliated with the brands it fit ,including TaoTao, Buyang, Coolsport, Jonway, Znen, NST, BMX, Kazuma, Sunl, Roketa, AIM-EX .For any reason you're not completely satisfied, you can ask for a replacement or full refund, no quest
Bestseller No. 20
CDI Box Ignition Coil 5 Pin Regulator Rectifier Relay Spark Plug for Kazuma Meerkat 50cc Falcon 70cc 90cc 110cc Taotao Roketa Coolster 110CC ATV 3050B by Lucky Seven
  • Fits almost all years Chinese made electric start upright engine 49cc 50cc 70cc 80cc 90cc 100cc 110cc 125cc engines. For ATV, Coolster, Quad Bike, Dirt Bike, Pit Bike, Go Kart, Kawasaki KLX, 4 Wheelers, Scooter, Buggy, Motowork, Dune, Taotao.
  • 12 Volt Coil+5 PIN CDI BOX+4 PIN Regulator+Solenoid Relay+Spark plug.Fits ATV / Quad / Kawasaki KLX / Coolster / Scooter / 4 wheelers / Buggy / Dirt Bike / Go Kart /Pit Bike/ Motowork more.
  • This kit include 2-pin Male Plug Relay,Ignition Coil 135 Degree Elbow,12v 4-pin Voltage Regulator,5-pin CDI. (Does Not fit for GY6 engine).
  • The kit Compatible with many brands,such as: Atomik, Pitpro, Hummer, Orion, Xmoto, Lei, DMX, SWD, TDR, DDR, Tommahawk, Monsoon, Grudge, Kazuma, Bull, Trooper, Hunter, Motox, Trojan, Blitz, Crusade, Link, Bigfoot, Kuda, Motoworks, Nitrous, Reign, Fury, Prox, Raider, Zongshen, Loncin, Ducar, Lifan, Thumpster, Thumbstar, Chongqing.
  • The items are the same as the pictures.5 Pins CDI module + 2Wire Ignition Coil + Starter Relay Solenoid + 4 PIN Voltage Regulator Rectifier + Spark Plug. Fits for: 50cc 70cc 90cc 110cc 125cc 140cc horizontal engine,Bikes & Quads,ATV, Buggy's.

Many parts are there that primarily comprise the ignition system and all these parts are very imperative most especially when learning the way how it works with the ignition system and most of all, to answer the common question ‘what does a CDI box do?’. The major parts include the charging coil, the stator, the flywheel, the timing mark as well as the hall sensor.

STATOR


This plate has the ability to hold the electrical wire coils, which in first place work to power the lights and battery charging circuits as well as ignition.

CHARGING COIL


Charging coil, on the other hand, is a coil found on the stator. It mainly creates power for the spark plug, condensers, and flywheel.

HALL SENSOR


This is responsible for measuring the point where the magnet of the flywheel changes from north to the south pole. It will then send a pulse to the CDI box. The pulse will then trigger it to move the energy that it has right from the capacitor into the high voltage transformer.

TIMING MARK


This pertains to the alignment point shared by the engine case and stator plate. This is very useful mainly because the stator plate can be rotated right to the left according to the mark. It will then change the CDI’s trigger point.

We cannot deny that not all people are aware of what a CDI box do. To give you the basic understanding and knowledge of it, here is how the CDI ignition actually works. Read this to know how to bypass a CDI box.

The CDI ignition mainly starts thru generating the charge while storing it up right before sending it out to the next system’s component. When the electrical level successfully reaches the right value, it is where the current signals and then charges a spark plug, thus allowing off the excess electricity in pulses, which in the first place power the engine.

what-does-a-cdi-box-do

The power passes all through the capacitor. After that, it is transferred to the ignition coil, which helps in boosting the power through acting as the transformer while allowing the energy to pass through it instead of catching it. Therefore, the CDI ignition lets the engine to keep running as long as the power source has a charge.

Take note that the CDI ignition systems have a fast charging time. It powers themselves even more compared to the inductive ignition system. These power sources’ types are perfect for much smaller machines including outboard motors, chainsaws, and motorcycles. In spite of the usability that it has, a certain limit is still there to the amount of charge a capacitor mainly holds right before it burns out.

This is the main reason why it is not an ideal resource most especially on the larger vehicles and machines. Keep in mind that the faster the CDI system spins, the lesser power it exudes. This is why it cannot power either a truck or car.

How To Troubleshoot A CDI System

For those who already know the answer to the question ‘what does a CDI box do?’ they are perhaps wondering how to troubleshoot a CDI ignition system. Well, that is not a problem anymore, since there are many ways to solve the problem.

The ignition problems mainly originate within either the charging system or battery. To generate the current needed and create a spark, there is a need to make sure, that the battery should have what it takes to supply the CDI box with the full twelve-volt current. On the other hand, the battery should at the same time power the lights of the motorcycle.

what-does-a-cdi-box-do

If the engine of the motorcycle turns over, yet it does not start, just completely charge its battery with the use of automatic battery charger right before you check anything else. However, if the motorcycle refuses to start, there is a need to conduct various tests with a multimeter.

This is done in order to know if the CDI box has incurred any damage. The good thing is that, the factory service manuals offer testing procedures along with CDI box specifications needed by the motorcycles. Click here to know more about CDI testing and troubleshooting.

How Do You Check A CDI Box?

what-does-a-cdi-box-do

Start by checking the owner’s manual for CDI box in order to find the electrical resistance specs of the device. If the CDI box works properly, the ohm meter’s readings should match with the specs.

Starting from the input wire, just plug the ohm meter in. After that, simply turn over the engine where the CDI box is attached. Take note of the readings, and if they are right within the range that is listed in the manual, all you have to do is proceed in order to check the output wire. Watch this to learn how to test motorcycle box, ignition coil.

Knowing the right answer to the common question ‘what does a CDI box do’ is very important. Not only you will become aware of how it works, but you will also know other important things that are related to it. We hope that the above-written article has given you an insight about CDI box.

Let us know what you think in the comments below. Feel free to share this article to anyone who has the same question as you.

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