MED ST1 ULTRA LIGHT ASSEMBLY
Description
The MED Stage 1 Ultra Light Assembly includes an EN8 steel flywheel, backplate and performance road clutch plate. It's the ideal setup for 998 Minis or lightly-tuned 1275 Minis with a pre-Verto system.
The package is expertly assembled, centralised and dynamically balanced to order.
Kit contents:
- MED EN8 Ultra Light steel flywheel - 3.66kg.
- MED EN8 Ultra Light steel back plate - 1.32kg.
- Performance road clutch plate.
- Blue clutch diaphragm.
- 9x high quality drive straps.
- 6x EN16T steel drive bolts.
- Fully assembled with 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.
Moving to the St2 Ultra Light package upgrades to a stronger clutch plate and diaphragm.
Additional Information
Weight comparisons
Ultra Light Steel Flywheel 3.66kg
Ultra Light Steel Backplate 1.32kg
X-Lite Steel Flywheel 2.50kg
X-Lite Alloy Backplate 0.74kg
Recommended usage
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.
The MED EN8 Ultra Light is therefore an excellent choice for performance road cars - lighter than standard yet still usable on a daily driver. It could also be used for light competition.
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.
Alternative options
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.