150cc Digital Adjustable CDI/Coil combo - DC-Powered
Stock CDIs often max out at 5,500 RPMs and stock GY6 coils produce ~12,000 volts.. This CDI/coil has an RPM ceiling of at least 9000RPMs, and produces up to 28,000 volts!
This high powered digital CDI/Coil combo mounts outside your electrical box. Simply attach the spark plug cap, bolt (or tie wrap) the waterproof CDI to the frame, and route the long wire harness to your stock CDI wiring harness inside the electrical box. The two wires that attached to your old coil should be taped off from one another with electrical tape and stored safely in your electrical box.
This is the DC-powered version for 150cc vehicles, and is highly recommended for any buggy that uses an aftermarket camshaft or the Endrigo Racing Head installed.
Product may vary visually from photo.
How to tell if you have a AC or DC-powered CDI:
Your CDI has two plugs, a 4-pin and a 2-pin. The 4-pin side may have 3 or 4 wires connected to it (both AC and DC versions). If the 2-pin connector has only 1 wire going to it, it's a DC CDI. If there are 2 wires attached to the 2-pin connector, then it's an AC CDI. Note: A very few DC-powered CDI systems will have two wires on the two-pin connector. For these systems, please check to see if your headlights will work while the engine is not running, and if your stock CDI has "DC" printed anywhere on it. In these cases, you need a DC CDI.
This CDI is ONLY for use with DC-powered buggies, ATVs, or scooters.
More info about CDIs:
CDI's are programmed with a "map" that tells the coil to spark at a certain time in the each revolution. The CDI receives the information from the pick-up sensor down near the stator that tells it at what point in each revolution the motor currently is at. So, for any given RPM level, the CDI knows "when" to fire the coil based on the plotting of this programmed "map".
Stock CDI's generally are only programmed with a map that goes to 5500-7000 RPMs or so (depends on model and the CDI the factory used). When you rev the engine up past this point (by modifying it in such a way as to increase the top end RPMs - like with lighter roller/slider weights), the stock CDI does not know what to do and slightly retards the timing to slow you back down until you're back on the "map".
A "No-limit" CDI is a bit of a misnomer - of course it has an upper limit programmed into it. The thing is, you're unlikely to have a transmission setup that would allow you to reach those high 10,000+ RPMs (and if you did, your engine is taking a heck of a beating on a regular basis!).
A vehicle with a CVT transmission will not continue revving up indefinitely until the motor blows up simply because you have a higher RPM limit CDI. It will increase in RPMs until the weights in the variator are fully extended and the belt is out as far as it will go (reached the max gear/pulley ratio). This is a physical ceiling to your RPMs as higher RPMs will not push the belt or weights out farther.
Lighter variator weights and heavier main torque springs will alter how high of RPMs that are required to hit this RPM ceiling, but generally speaking you have to go out of your way to reach 9-10,000 RPMs - most people will never come close to hitting that even with 10g GY6 weights or 13-15g weights in a 250cc.
That being said, the aftermarket transmission mods often easily raise your top end RPMs beyond the 5500 or so RPMs the stock CDI is mapped for. The aftermarket CDIs will allow you to rev the motor well past that point giving you the benefits of more top speed (relative to the stock CDI) and better low end power (due to the lighter weights in your tuned transmission).
Some aftermarket CDIs also come with the benefit of some timing advance. This is often built into the CDI and advances the timing curve usually around 3,000 RPMs and again later on around 7,500 or 8,000 RPMs. Many "adjustable" CDIs have this kind of auto timing advance built into them already and don't need to be manually adjusted. We generally recommend leaving these adjustable ones at the default "12:00" position unless you have a specific need for further adjustment, as the CDI has a built in advance that will accomplish timing advance without any outside interaction.