Mitoos MXL z89 timing belt

Precise transmission for your axles with the Mitoos MXL z89 toothed belt

The Mitoos MXL z89 toothed belt (ref. CXM489) is a transmission spare part specifically designed to integrate with the entire ecosystem of toothed pulleys from the Mitoos brand. With 89 teeth and 2 mm wide, it follows the standardised MXL pitch, ensuring a clean engagement with no play on each lap.

Function and performance

MXL pitch belts are designed to transmit motion between axles at high revolutions while maintaining traction at all times. Unlike conventional pinion and crown gear systems, toothed belt transmission operates quietly, absorbs small vibrations, and reduces wear on rotating components. The result is a smoother transmission and cleaner running, particularly noticeable in setups where axle synchronisation is critical.

Compatibility

This belt is compatible with the entire range of Mitoos toothed pulleys:

• Plastic pulleys: references M136 to M140.
• Aluminium pulleys: references M143 to M149.

The fit is perfect in both families thanks to the standardised MXL profile, so there is no need to force the assembly or make any prior adaptations.

Assembly and preparation

Assembly does not require special tools. Simply install the pulleys on the corresponding axles, place the belt without excessive tension, and check that the run is clean and free of lateral rubbing. Correct tension — neither slack nor overly tight — is key to maximising the belt's lifespan and maintaining transmission efficiency. It is recommended to periodically check the condition of the belt, especially after intensive use sessions.

Common errors

• Excessive tension: can generate heat and premature wear on axle bearings.
• Insufficient tension: causes tooth skipping and loss of synchronisation, especially at high RPM.
• Mixing belt profiles: always use belts and pulleys of the same standardised pitch (MXL) to ensure proper fit.

Frequently asked questions

How many teeth does this belt have?

The Mitoos MXL z89 belt has 89 teeth, as indicated by its designation.

Which Mitoos pulleys is it compatible with?

It is compatible with all Mitoos toothed pulleys: the plastic ones (M136-M140) and the aluminium ones (M143-M149).

What is the width of the belt?

The width of the belt is 2 mm, suitable for the range of Mitoos pulleys in this category.

What advantages does toothed belt transmission have over crown and pinion?

Toothed belt transmission operates more quietly, absorbs micro-vibrations, and allows for smoother running. It is particularly useful in setups where mechanical noise reduction and improved efficiency at high revolutions are sought.

How often should I check or replace the belt?

It depends on usage, but it is advisable to inspect it after intensive sessions. If there is visible wear on the teeth, cracks, or excessive play, it is time to replace it.

The Mitoos MXL z89 toothed belt (ref. CXM489) is a precision slot car transmission component featuring 89 teeth and a 2 mm width, following the standard MXL pitch profile. It fits the full range of Mitoos toothed pulleys — both plastic (M136-M140) and aluminium (M143-M149) — ensuring smooth, high-RPM power transfer between axles with no traction loss. An essential upgrade or replacement part for 1/32 slot car builds requiring reliable belt-drive transmission.