Opposite are images of the supercharger CAD animation. The charger is highly flexible in design and can be assembled in several different configurations. It is designed to run on most Piaggio/Gilera "Leader" 4T engines. It will also work on other bike engines up to 250cc without much modification.

The supercharger fits inplace of the carburettor. The exhaust manifold from the blower fits into the original engines rubber mounted inlet manifold. The old vacuum pipe for the fuel tap is now used for a boost gauge. The blower is secured in place using the fixings of the inlet manifold, starter motor and a bracket that connects the drive nose extension to the side case, nothing is welded to the original engine. The original carb and its ancillaries are refitted to the inlet side of the blower with a small foam filter and rubber mounting. The original air box is not used.

To get an idea of scale the total width of the rotor casing is 70mm. The design uses 7 seperate CNC aluminium casings, 2 CNC rotors, 1 CNC exhaust manifold (not shown) and two steel precision drive shafts. The inlet manifold is a modified 30mm unit from the GT186 Lambretta kits and the "nose extension" has a cavity that acts as an oil reservoir for the helical gear lubrication system. All the casings are mated together with silicon sealant with the exception of the inlet and exhaust manifolds.

The blower drive comes from a drive pulley fitted to the variator fan. The belt drive to the blower passes through a hole that is cut into the side casing. In the case of ET4 the kickstart mechanisum will have to be removed to create the necessary clearance.

Forced induction is a very old technology but is beginning to experience a renaissance with many new performance car manufacturers. Currently there is no small capacity supercharger products available particularly for the two wheeled arena so i thought, f**k it I'll just have to make one myself and here it is. There is no special pattern making required to produce it so pretty much this is it, if you're interested mail me.

The desgin does utilise some "off the shelf" components but the "business end" is all custom CNC machined. Sit down, if you want one it will not be a cheap option but it certainly would be a spectacular one. I should be able to get a prototype put together later this year, watch this site to see how it progresses.

If you're interested and you like the idea mail me.

• Once the file has downloaded perform the following.
• Press the green "continuous play" symbol
• Wait for the model to start rotating
• Press the green "stop" symbol
• Select the "rotate" tool from the menu
• Click and drag on the model with the mouse to any position
• Use the zoom and pan tools to see greater detail
• Right click items on items in the list on the left to hide parts you do not want to see. The rotors are missing because we haven't finalised the design yet, it isn't as easy as we first thought. Have fun, you'll love it!
• OK, so now we've finished the design including solenoid pop off valve integrated on a nice manifold, this CAD file is slightly different in that you can not hide the items, but it will give you an idea of what is coming.

Download the supercharger assembly (3 mb)

NEW supercharger assembly (3 mb)

For more information click contact.