Cylinder - piston without cylinder head ITALKIT Racing aluminum 85cc Ø50mm special stroke 44mm connecting rod 85mm for minarelli

Not homologated on open road, only reserved for competition on circuit, closed road.

This cylinder, piston without cylinder head 85cc Ø50 mm is mounted on mécaboite Minarelli AM6, it is the spare part for the 85cc racing pack with 44.00mm long stroke crankshaft and the cylinder head with high compression stud with incoming combustion chamber. ITALKIT crankshaft with celeron bearings in 44.00 stroke and 85mm connecting rod. In combination with 44 stroke, the actual displacement is 86.35cc. With an original stroke crankshaft, a 2.5mm shim under the cylinder will be essential . Do not forget to ask its specific adapted cylinder head.



The 50mm bore cylinder is made of aluminum alloy and has a specific heat treatment and an internal niquel / silica coating, giving it all its solidity and reliability. Equipped with 6 intake transfers, 2 shaped boosters worked and finally the impressive exhaust outlet by its shape and size to such an extent that the outlet diameter has been revised upwards and measures no less than Ø32mm (an exhaust ring is provided for the passage of an exhaust in diameter Ø28mm).



The cooling has also been completely revised and corrected in order to offer the best possible heat exchange and at the same time to obtain a significant performance gain, in fact the less an engine runs out of steam and heats up and the more performance remains present. The Ø50 mm piston is not chosen at random, it is a high-end ITALKIT mono segment model with black graphite treatment identical to the VERTEX piston. In other words, very high quality equipment whose reputation / quality is well established. This piston is therefore equipped with a thin chrome segment 1mm thick thus promoting the revving. Thanks to the graphite treatment, its shapes and its composition, this piston has been very well designed and studied in order to offer better thermal expansion, agreeing at the same time perfectly with this cylinder to support the frank recoveries, brutal changes of modes and prolonged endurance on circuit.



Delivered 100% complete as presented, you can rely on the photographs, they are contractual as usual. This cylinder / piston will be ideal in the event of wear or breakage and replacement of your old high engine, without however change.

We recommend that you accompany this pack with at least : a carburetor of 28, an admission kit in flexible assembly, ultra reinforced crankshaft ITALKIT Competition race 44 / connecting rod 85mm, cylinder head with high compression stud ITALKIT with incoming stud Ø50mm, Selettra ignition from ITALKIT with variable advance, NGK B105EGV cold spark plug, mandatory racing engine oil, large volume racing relaxation exhaust essential ....

Contains :

- Ø50mm aluminum cylinder 6 transfers with large booster exhaust
-Piston ITALKIT graphite mono segment Ø50mm
-Segment Ø50 chrome end thickness 1mm
-Reinforced piston pin Ø14 X 37mm
-G type piston clips
-Engine gasket pack with several base gaskets of different thicknesses
-X1 centering pin for cylinder head
-Reduction exhaust ring Ø32 to 28mm
-Installation instructions
-Sticker   



As an option we offer you 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 of the piston and the lower skirts is also included in this modification. Count a little extra time for this preparation!

This high engine is mounted on the following 50cc motorcycles with gearbox equipped with the MINARELLI AM3, AM4, AM5, AM6 euro 1, AM6 euro 2 engine:

- APRILIA RS AM6 engine from 1997 to 2006 (after 2006, beware of engines upgraded to DERBI euro 3)
- APRILIA RX AM6 engine (after 2006, beware of engines upgraded to DERBI euro 3)
- APRILIA MX AM6 engine (after 2006, beware of engines upgraded to DERBI euro 3)

-BETA CRE

-BETA RR
-BETA RR ALU

-HONDA HM
-HONDA CRE
-HONDA BAJA

-HUSQUVARNA WXE
-HUSQUVARNA CH

-HM DERAPAGE
-HM CRE
-MALAGUTI DRAKON

-MALAGUTI XTM
-MALAGUTI XSM

-FANTIC CABALLERO

- PEUGEOT XP6
- PEUGEOT XPS
- PEUGEOT XP STREET
- PEUGEOT XP STREET EVO
- PEUGEOT XR6
- PEUGEOT XR7

-MOTORHISPANIA RYZ
-MOTORHISPANIA RX-R
-MOTORHISPANIA RX

-RIEJU RS1
-RIEJU RS2
-RIEJU RS2 MATRIX
-RIEJU RS2 MATRIX PRO
-RIEJU SMX
-RIEJU MRX
-RIEJU SPIKE

-KEEWAY TX EN

- YAMAHA DT
-MBK X-LIMIT
YAMAHA TZR
-MBK X-POWER

-SHE RC O SM
-SHE RC O IN DURO
-SHE RC O HRD
-SHE RC O IN DURO

And many other machines !