Description
mvt dd23 - Internal rotor ignition with light
MVT Digital Direct 19 internal rotor ignition with light for 2-stroke Chinese scooters (CPI / Keeway etc.)
MVT Digital Direct - Top performance plus light
The MVT Digital Direct ("MVT DD" for short) is a digital internal rotor ignition with variable ignition timing, i.e. the ignition timing changes via the CDI depending on the engine speed in order to provide maximum power at any given time. It is primarily intended for use with racing or high-end setups 70cc and higher.
The main advantage of the MVT DD ignition is that it is equipped with a 12-volt 55-watt output. Unlike many other internal rotor ignitions, you can retain lighting and on-board electronics with this ignition. Performance is noticeably improved, particularly in terms of power band and responsivity.
Adjusting and calibrating the MVT DD ignition
- First remove the original ignition and install the MVT Digital Direct ignition properly. Do not tighten the stator and rotor until the ignition has been adjusted.
- Use a micrometer or a TDC dial gauge to set the following parameters: 0.4 mm before TDC for original stroke and 0.35 mm for long stroke.
- Then connect the ignition to the wiring harness so that the vehicle lighting works (see assembly instructions).
If you need even more power, you can combine the ignition with the MVT Eprom Box to select the appropriate ignition curve.
We recommend a racing spark plug and a carburetor with a diameter of at least 19 mm.
Requirements
- A micrometer for precise adjustment of the ignition
- A charged 12-volt battery. We recommend this 12V - 5Ah SLA4L-BS SLA battery.
Additional information:
Suitable for Chinese scooters with 2-stroke engine / Minarelli replica engine such as Keeway, CPI, Sachs ...etc.
MVT Digital Direct
The MVT Digital Direct ignition is the brand's top model, with extreme performance, agile engine and optimum response at all engine speeds thanks to a lightweight internal rotor and CDI with variable ignition timing. Bonus: the ignition has a 12V output for lights / on-board electronics!
The DD internal rotor ignition has a digital CDI with variable ignition timing adjustment, i.e. the ignition timing adapts to the engine speed and is therefore ideally suited for tuned engines. In this way, you always get the best ratio between torque and maximum power, regardless of RPM.
Advantages of MVT Digital Direct
- Digital internal rotor ignition
- With light
- Simple adjustment
- CDI with variable ignition timing = maximum power at all RPMs
Inner Rotor Ignition
An internal rotor ignition is a racing ignition designed to increase performance. Inner rotor ignitions are designed for motorsports and competition, in rare cases they also provide power for vehicle lighting. (e.g. the MVT ignition).
Advantages of an internal rotor ignition
Inner rotor ignitions are the ultimate choice for the race track, they are however not really suitable for street use.
The compact and lightweight internal rotor puts less weight on the crankshaft and allows for quick revving, very high engine speeds and an enormous power increase at high rpm.
Another advantage is that this type of ignition is less susceptible to moisture than standard ignitions.
Tip: You may want to consider a tuning ignition cover with additional holes / cutouts to improve ventilation.
Disadvantages of an internal rotor ignition
RPMs increase faster due to the lower mass, this will affect torque at low RPMs, though. Therefore, internal rotor ignitions are only worthwhile for racing, because on the racetrack you'll constantly stay at high engine speeds.
Installing and adjusting an internal rotor ignition
Installing an internal rotor ignition requires technical knowledge and careful adjustments to keep the engine running optimally and really optimize performance. We recommend our tutorial to learn how to install and adjust an internal rotor ignition.
| Ignition MVT DD scooter CPI Oliver | |
|---|---|
| Article no. | MVT-DD23 |
| EAN | 3701674301086 |
| Weight | 1,69 kg |
| Series | Digital Direct |
| Brand | MVT |
| Product type | Inner rotor ignition |
| Ignition | Digital |
| Power supply lighting | With power supply |
