M4 Motor + Magnet

Power and grip in one block: the M4 Plus Motor with long can and external magnetic effect

The M4 + Magnet (CXM204) is the long can variant of the popular M4 Plus, designed for those who need a motor that not only delivers consistent RPM but also provides its own magnetic effect towards the track. A combination that opens interesting possibilities for both competitive applications and custom builds.

Main features

• Format: Long can M4 Plus Motor — 15.5 × 20.5 × 32 mm
• Shaft: 2 mm smooth, length 12 mm
• RPM at 12V: 18,500
• RPM at 15V: 20,000
• Current draw: 200 mA
• Weight: 330 g/cm
• External magnetic effect: Yes

Behaviour and performance

With 18,500 RPM at 12V, the M4 + Magnet sits in a mid-high power range: lively enough to feel on track, but without the nervous character of extreme competition motors. Increasing to 15V reaches 20,000 RPM, allowing the use of variable voltage power supplies to adjust the car's temperament according to the circuit.

The 200 mA consumption is moderate, favouring thermal stability during long running sessions. The smooth 2 mm shaft facilitates the mounting of standard pinions without additional complications.

The feature that distinguishes this motor from versions without a magnet is the external magnetic effect. This means that the motor's magnetic field interacts with the metal track, adding an extra layer of grip without the need for separate downforce magnets. For certain chassis and mounting configurations, this behaviour can be a clear tactical advantage.

Recommended applications

The long can design of the M4 Plus makes it particularly suitable for chassis with mounts designed for this format, where the extra length provides more mounting surface and a more stable transmission. It is an option to consider in inline or anglewinder setups, depending on the orientation of the receiving chassis, although it is advisable to always check the mount dimensions before installation.

Usage recommendations

• Ensure that your chassis mount accommodates the long can format (32 mm in length) before purchasing.
• The smooth 2 mm shaft requires pinions with a compatible hole; check the fit before tightening the set screw to avoid play.
• If your setup includes additional downforce magnets, consider the motor's own magnetic effect to avoid overloading grip and losing natural handling.
• To make the most of the 20,000 RPM at 15V, ensure that the braids and guide are in good condition and have a clean contact.

Frequently asked questions

What differentiates the M4 + Magnet from the standard M4 Plus?

The main difference is the external magnetic effect. The M4 + Magnet generates a magnetic field that interacts with the track, passively adding grip without the need for separate downforce magnets. The standard M4 Plus does not have this feature.

What type of installation does this motor support: inline, sidewinder, or anglewinder?

The motor itself is not limited to a specific configuration; it is the chassis and mount that determine the orientation. It can be mounted in all three configurations as long as the mount is compatible with the long can dimensions of the M4 Plus.

Is it suitable for competition or is it more of a custom build motor?

With 18,500-20,000 RPM and 200 mA, it fits perfectly within the usage range for both clubs with moderate power regulations and for custom builds by demanding hobbyists. Check your category's regulations before using it in official competition.

What pinions are compatible with the 2 mm smooth shaft?

Any standard pinion for a 2 mm shaft. Ensure that the pinion hole is smooth (not keyed) and that the set screw is tightened properly to avoid slipping.

Can the magnetic effect interfere with other electronic components of the chassis?

In the vast majority of conventional installations, this is not an issue. Only in chassis with very sensitive electronics located very close to the motor might shielding need to be considered, although this is an uncommon scenario in standard scale slot racing.

The M4 + Magnet motor (CXM204) is a long-can M4 Plus unit featuring external magnetic effect, 18,500 RPM at 12V and 20,000 RPM at 15V, a 2 mm smooth shaft with 12 mm length, and 200 mA current draw — an ideal slot car motor upgrade for custom chassis builds, club racing, and inline or anglewinder configurations requiring reliable torque and passive downforce assistance.