MED ST3 ULTRA LIGHT ASSEMBLY
The MED Stage 3 Ultra Light Assembly includes an EN8 steel flywheel, backplate and MED paddle clutch plate. It's the ideal setup for trackday and competition cars running a pre-Verto system.
The package is expertly assembled, centralised and dynamically balanced to order.
If you have an EN40B steel crankshaft, we would recommend using an EN24T X-Lite steel flywheel, not the EN8.
- MED Ultra Light steel flywheel - 3.66kg.
- MED Ultra Light steel back plate - 1.32kg.
- MED paddle clutch plate.
- Competition grey clutch cover.
- Nine high quality drive straps.
- Six EN16T steel drive bolts.
- Full assembly and dynamic balance.
To install without disturbing the balance, remove the large washer and spring clip from the diaphragm and there is no need to disassemble the clutch/flywheel to install the bolt.
Flywheels are available with a pre-engaged or inertia-type starter motor ring gear. Please see the additional information tab for further recommendations.
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 lightest possible clutch and flywheel setup is ideal for a competition car, whereas a road car will benefit from more flywheel mass to retain drivability in traffic.
This flywheel will suit all transverse A-Series engines (Mini/Metro) with a pre-Verto clutch setup. 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 or inertia?
This relates to the ring gear and starter motor installed on your Mini. Inertia is the original style starter motor that uses a separate solenoid unit on the inner wing, whereas pre-engaged has an in-built solenoid. If you have one of our High Torque or Slimline starter motors, simply choose the correct flywheel to suit.
For reference, pre-engaged flywheels have 129 teeth on the ring gear, inertia types have 107 teeth.
The later Verto system introduced in the mid-1980s makes a good alternative for a performance road Mini. The steel flywheel itself is lighter than its pre-Verto equivalent, however the clutch cover that accompanies it makes the complete assembly heavier. The Verto setup gives an easier clutch pedal, so overall it's a good alternative for road Minis.
Saving yet more weight is the MED X-Lite Flywheel, which features larger cut-outs and an integral ring gear for the starter motor.