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Polini Tuning Kit "Big Evo" 96cc Yamaha Aerox / MBK Nitro

MXS Custom Item no.: MS-PKMBIGEVO96

Polini Tuning Kit "Big Evo" 96cc Yamaha Aerox / MBK Nitro


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Data Sheet
scope of delivery (3)
Suitable for (46)


For those of you who want MORE - the Polini Big Evo 96cc Tuning Kit MBK Nitro / Aeroxfor a fantastic price!

The kit contains a Polini Big Evo 94cc Cylinder and an MXS Racing GP Crankshaft (45mm stroke / 90mm conrod), a combination which will get your engine up to 96cc. The kit includes:

Polini 94cc Cylinder Kit "Evolution 2010" (44mm stroke) MBK Nitro / Aerox
MXS Racing Crankshaft “GP” (45mm stroke / 90mm conrod) MBK Nitro / Aerox
MXS Racing Spacer 5mm MBK Nitro / Aerox

The addition of the MXS crankshaft with a 45mm stroke (instead of 44mm) will get the Big Evolution cylinder's displacement up to 96cc turning it into one of the largest cylinders for MBK Nitro and Yamaha Aerox on the market.
It has a 90mm connecting rod for improved power transmission to the crankshaft and consequently improved performance.
With the right components (30mm carburetor, Hyper Racing exhaust and digital ignition) the kit can easily get more than 26hp!

You'll have to mill in the crankcase to make room for the cylinder base (d = 57.2mm +/-0.1mm, depth = 20mm) and the crankshaft (d = 77mm); manual is included.

Note: You'll have to adjust squish clearance when installing the kit as the crankshaft has a 45mm stroke and a 90mm connecting rod.

Data Sheet

Name Polini Tuning Kit "Big Evo" 96cc Yamaha Aerox / MBK Nitro
Brand MXS Custom
Homologation No
Displacement 95cc
Stroke 45 mm
Conrod Length 90 mm
Product Line Hyper racing
Material Aluminium
Bore 52 mm
Piston Pin 13 mm

Your product goes with the following manufacturers and their models:

Adly (Her Chee)

AirTech 50cc LC


Area 51 LC

Gulliver 50cc LC

Rally 50cc LC

SR 50cc LC (1994 - 1997) - Minarelli horiz.

SR 50cc Netscaper LC - Minarelli horiz.

SR 50cc Racing LC (before 2000) Minarelli

SR 50cc Stealth LC - Minarelli horiz.

Sonic 50cc LC


491 50cc RR LC (before 2003) - Minarelli horiz.

491 50cc RR Replica LC (before 2003) - Minarelli horiz.

491 50cc ST LC (before 2003) - Minarelli horiz.

491 50cc Sport LC (before 2003) - Minarelli horiz.

K2 50cc LC - Minarelli horiz.


Ark 50cc LC - Minarelli horiz.

Eikon 50cc LC - Minarelli horiz.


GTR 50cc LC - Minarelli horiz.


GSP 50cc LC


Dragster 50cc LC


Ark 50cc LC


Galactica 3.0 50cc LC


Speedjet 50 LC 2-stroke


MachG 50cc CAT LC (after 2003)

MachG 50cc LC (before 2003)

Nitro 50cc CAT LC (after 2003)

Nitro 50cc LC (after 1999)

Nitro 50cc LC (after 2013)

Nitro 50cc LC (before 1999)

Nitro Naked 50cc LC

Nitro Naked 50cc LC (after 2013)


F12 Phantom 50cc LC

F12 Phantom 50cc LC (after 2004)

F12 Phantom R 50cc LC

F15 Firefox 50cc LC

F15 Firefox 50cc LC (after 2004)


Crogen RS 50cc LC 2-stroke

Magnet RS 50cc LC 2-stroke


Speedjet RS 50cc LC


Aerox 50cc LC (after 1999)

Aerox 50cc LC (before 1999)

Aerox 50cc LC CAT (after 2003)

Aerox Naked 50cc LC (after 2013)

Aerox Naked 50cc LC CAT (after 2003)

Aerox R 50cc LC (after 2013)

Jog RR 50cc LC (before 2003)

Jog RR 50cc LC CAT (after 2003)

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