Preview: you will need to have an MHR variator and an MHR big bore 86cc kit in order to install this crankshaft, of course, you will need to remove the electric starter and kick start as well as machine the crankshaft passage to 76 .5mm in the casings. This crankshaft is therefore reserved for the most enthusiasts and preparers of you...

This crankshaft is simply magnificent, it is equipped with a very expensive and magnificent connecting rod forged and cut in the mass in aeronautical materials. It has a stroke of 44mm which will give you no less than 87cc coupled to the 50mm diameter MHR BIG BORE kit. Be careful with its 13mm piston pin, it can only be fitted with the MHR BIG BORE 87cc kit. It is really well balanced and has nothing to do with other crankshafts... Its price is explained both by its materials which cost a fortune and by the study that had to be done to get such a race machine out . Clearly, better balanced, more solid, more efficient, there is no... Even the masses have been calculated in relation to the kit.

Once again Malossi wanted to make a difference, she went even further. An innovative project, a degree of finish and an incredible quality of materials, make this crankshaft an exclusive product without competition.

Born for the official engines of the Malossi Trophies, they are now also available for private teams and can therefore be found in the catalogue, which can be purchased anywhere.

- The crankshaft is the heart of the endothermic engine.

- All the performance of an engine necessarily starts from the crankshaft

- The engine can neither achieve high efficiency nor be reliable if it is not equipped with the best quality crankshaft.

- This is why Malossi exclusively produces 1st class crankshafts.

this pack contains:

the crankshaft stroke 44mm, axis 13mm, connecting rod 90mm

special variator nut

revised and corrected variator barrel

revised and corrected variator support plate

reinforced needle cage for 13mm axle

crankshaft shim

TECHNICAL CHARACTERISTICS

- Material half shafts: 18 Ni Cr Mo5.

- The half shafts and rotating masses are monolithic and forged.

- Manufactured on very high precision machine tools.

- All components are subjected to a minimum of five heat treatments.

- The finish of the surfaces is high to improve reliability.

- Dynamic balancing with tungsten mass and light materials, up to 16000 rpm and +.

- Oversized coupling axis, Ø18.

- Connecting rod cut in the mass in forged aeronautical steel.

- Silver bearing with silver transfer.

- Maximum rigidity.

- Recovery of harmful spaces (inside the pump casing).

- Vibration and friction reduced to almost zero.

- Increased kinetic energy.

- Increased longevity.

PREPARATION OF THE HALF-CASES

for Art.5313275: Bore the 2 half casings to a diameter of 76.5 mm in order to be able to insert the crankshaft.

This crankshaft has been designed with the semi-shaft on the transmission side increased in order to be able to make the best use of their potential. Inside the package there is therefore a hub, a variator cap and a spacer which must be substituted for the Malossi MHR or over range variator in order to be able to mount the crankshaft correctly.

Mounts on:

APRILIA AREA 51 2T LC
APRILIA GULLIVER 50 2T LC
APRILIA SR NETSCAPER 50 2T LC
APRILIA SR RACING 50 2T LC
APRILIA SONIC 50 2T LC
APRILIA SR REPLICA 50 2T LC

BENELLI 491 SPORT 50 2T LC

BETA EIKON 50 2T LC

ITALJET DRAGSTER 50 2T LC

MALAGUTI F15 FIREFOX
MALAGUTI F12 DIGIT KAT - PHANTOM 50 2T LC
MALAGUTI F12 DIGIT KAT - PHANTOM 50 2T LC euro 2
MALAGUTI F12 - PHANTOM 50 2T LC
MALAGUTI F12 R LC 50 2T LC euro 2

MBK MACH G 50 2T LC
MBK NITRO 50 2T LC

YAMAHA AEROX 50 2T LC euro 0/1
YAMAHA AEROX 50 2T LC euro 2
YAMAHA JOGRR 50 2T LC euro 2

And other models to check...

Kit special vilebrequin bearings quick dismantling for C ONE engine, RC ONE on PIAGGIO, MINARELLI