MED ST1 X-LITE ASSEMBLY - EN24T BACKPLATE

Flywheel compatibility

Upgrading to an MED steel flywheel not only saves weight, but also gives a more durable surface on which to grip the clutch plate. The lighter the flywheel, the faster the engine will be able to increase/decrease RPM, making it more free-revving and responsive to throttle input.

The X-Lite is our lightest possible clutch and flywheel setup and is ideal for a competition Mini. For regular road use, you may prefer to look at our Ultra Light range, which carries a bit more weight. However, we have known customers using X-Lite kits on the road for more extreme builds.

This flywheel will suit all transverse A-Series engines (Mini/Metro) with a pre-Verto clutch setup and is particularly well paired to EN40B steel crankshafts, the stronger steel giving better resistance to fretting on the taper.

It is possible to convert from Verto to pre-Verto by purchasing the MED Heavy Duty Clutch Operating Kit. Please note - this will not suit fuel-injected Rover Minis. See the MED SPi Flywheel or MED MPi Flywheel for these cars. 

Pre-engaged only

To reduce weight and improve balance, the flywheel's ring gear teeth are CNC machined as part of the manufacturing process, and we have chosen the later pre-engaged tooth profile. Pre-engaged starter motors have an in-built solenoid, and were fitted from the advent of the Verto style flywheel in the early 1980s.

For reference, pre-engaged flywheels have 129 teeth on the ring gear, inertia types have 107 teeth. Make sure to use the correct starter motor, or you will damage the ring gear.

Why choose X-Lite?

Reducing flywheel mass improves the Mini's acceleration considerably, more so than the overall weight loss.

Standard factory flywheels can weigh over 7.5kg alone, so the incredible 4.8kg overall weight of the X-Lite assembly will make your Mini accelerate much faster, feel more responsive, enable slicker racing downshifts and massively improve lap times.

Fitting advice

We would highly recommend purchasing a complete balanced flywheel assembly and fitting it in one piece to retain the balance. You may wish to lap the flywheel gently to the crankshaft taper before fitment, being careful to remove all traces of paste before final installation.

Firstly lock the engine in position with a Mini flywheel locking tool. Torque the MED pre-Verto flywheel bolt to 130lb/ft, to seat flywheel on the crankshaft taper.

Now undo the bolt, apply a drop of standard-grade thread lock to the thread and re-torque to 130lb/ft. This will ensure the flywheel is properly seated on the crankshaft taper.