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X33r PowerMaster cush drive 7 plate clutches are the first dedicated mass-produced Lambretta clutches with an integral cush drive in the lower section designed for all tuned engines. All parts are Italian made to the highest possible standards, with NO compromises whatsover taking during the manufacturing process.
WHAT IS A CUSH DRIVE?
The idea of the cush drive is that this drastically reduces the ‘shock’ of the power output being transmitted to the gearbox during harsh riding or quick gearchanging. This concept has been used with great success for years in motorcycle and kart circles, and even Innocenti tried a similar system with their Series 1 and 2 models, albeit using a system capable of withstanding very limited power. The new Casa Performance clutches use rubber buffer ‘rings’ made of a material specifically designed for cushdrive. There are seven friction plates. These are the clutches used in the Casa Performance engines which put out over 40bhp as standard.
HOW MANY SPRINGS?
Two sets of 12 springs are supplied with each clutch.The difference is:
'X33k' = STRONG for highly tuned engines (such as SSR265 Scuderia)
'X33ks' = MEDIUM for all other engines
In either case, the number of springs utilised can be reduced as needed, for example: an extremely powerful SSR265 Scuderia will need all 12 springs of the STRONG X33k set, whereas a Mugello 186 with 10bhp will probably only need 4-6 from the MEDIUM X33ks set. The best way to see how many springs are needed is to steadily REDUCE the number of springs fitted until the clutch starts to slip, then immediately ADD a couple more.
The PowerMaster cush drive clutches are available in 46T, 47T and 48T crownwheel sizes and the actual toothed crownwheels can be swopped over and changed, as they are available to purchase separately.
Casa Performance have put a lot of time and consideration into resolving some of the issues found on other aftermarket clutches to ensure that the PowerMaster cush drive clutches are perfect in quality, fitment and access. These clutches can be dismantled simply by removing the central ‘Thrust Bearing’ disc and you have instant access to the 22mm main clutch / cluster nut, so no clutch compressor tool is required. The high-quality Thrust Bearing system was designed after problems were found with other clutches on the market suffering from the central pressure button locking up and even welding itself together due to excessive heat build-up. No chance of that happening with the PowerMaster.
HOW MANY PLATES?
The PowerMaster uses 7 friction plates and 6 steel plates (one of which is thicker and can be fitted in any position betweeen the others)
The PowerMaster cush drive clutch is a plug n’ play part for ALL Italian, Spanish or Indian Lambretta engines, including new generation engines such as CasaCases, Gran Turismo and Misano engines. Being 1cm taller than a normal Lambretta clutch, you will either need to use this clutch with a RLCX40 CasaCover egine side case (which will also give you the added advantage of feather light clutch lever action at the handlebars) or a 1cm spacer between the engine casing and the original type sidecasing.