Kit 75cc Ø48mm ATHENA RACING aluminum for minarelli P4, P6, MACAL TR, M83, BIMOTOR FREE, MALAGUTI FIFTY ...

For the true enthusiasts of old powerful machines we present this kit for MINARELLI P4, one of the rare new kits still manufactured for these engines. ATHENA in the 1990s bought the EUROCILINDRO group, so they continue to market the old EUROCILINDROs of superior quality with new generations of machines! This kit is a real monster, its diameter of 48mm offers a much increased displacement!

The bore is made according to the rules of the art and the processing is of very high quality! You can put this cylinder on a short / short stroke connecting rod by removing the 3mm thick aluminum shim which is at the base of the cylinder. On this model, the intake has been heavily revised and corrected for better sweeping and filling of the lower engine. The shape of the base and the channels have also been retouched (taken from the competition kits of the time…).

You will certainly appreciate the relatively high diagrams! The kit comes with a Ø20mm intake pipe to mount a 20 or 21mm PHBG recommended! This kit also comes with an interlocking competition exhaust outlet. The cylinder head is a large volume model, it has a high compression frustoconical polished combustion chamber, so that the chamber is properly aligned, it is a model entering the cylinder. The piston is also a very high-end model, manufactured at vertex it is in single segment to allow the highest speeds, this segment is obviously like 90% of the old L-shaped kits.

We hope to make people happy by marketing this type of parts! You will certainly also appreciate that the pipe fixing will let you without too much difficulty put a pipe in 4 fixing screws, between axis 30 X 45mm, the 4 holes are pre-drilled, you just have to re-drill and tap! Why not install a real flexible pipe… In order to install a good 25 or 26mm of carburetion afterwards! The minarelli am6 and various new DERBI have only to behave in front of this monster of power ...

We recommend accompanying this kit with at least : 21mm carburetion, B9 or B10 spark plug, ignition holding the towers, racing exhaust, connecting rod and crankshaft bearings holding the course! ...

The pack contains :

Piston mono segment special Ø48mm VERTEX

Ø12mm treated reinforced axle

Piston clips dirty type Ø12mm by Ø1mm

Ø48mm segment cast iron chrome L type

Complete seal pack

Racing aluminum cylinder

Exhaust tip

Ø20mm intake pipe

Notice / guaranteed

High compression cylinder head

Sticker

Spare parts :

Ø12mm clips

Piston

Pack attached

Segment

Ø20mm intake pipe

Cylinder head

Cylinder / piston without cylinder head

Exhaust mounting flange

According to ATHENA, this kit is mounted on the following motorcycles / engines :

Bimotor FREE TIME 50 - Motorcycles-mopeds
Macal M83 50 - Motorcycles-mopeds
Macal P4 R 50 - Motorcycles-mopeds
Macal TR 50 - Motorcycles-mopeds
Malaguti FIFTY 50 HF / MIX - Motorcycles-mopeds
Minarelli 2T P4 / P4 SPORT 50 - Motorcycles-mopeds
Minarelli 2T P6 ARIA MCS - Motorcycles-mopeds
Minarelli 2T P6 RADIALE CROMATO - Motorcycles-mopeds
Minarelli G1R 50 - Motorcycles-mopeds
Motron GL4 FLASH 50 - Motorcycles-mopeds
Rizzato Atala 3LD 50 - Motorcycles-mopeds
Rizzato Atala MASTER 3LF 50 - Motorcycles-mopeds
Testi MILITAR 50 - Motorcycles-mopeds
...

As an option we offer a stage 1 preparation, this preparation is a modification of the channels and the exhaust port by increasing the diagrams and improving the duct, it increases the performance of the cylinder. An improvement to the piston and the bottom of the skirt is also included in this modification. Allow a little extra time for this preparation!