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Stage6 Cylinder Kit 70cc Sport Pro MK2 12mm piston pin Minarelli horizontal LC (Yamaha Aerox)

Stage6 Item no.: S6-7416604

Stage6 Cylinder Kit 70cc Sport Pro MK2 12mm piston pin Minarelli horizontal LC (Yamaha Aerox)

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Data Sheet
Suitable for (46)


Stage6 Cylinder Kit 70cc Sport Pro MK2 12mm piston pin Minarelli horizontal LC (Yamaha Aerox / MBK Nitro). The first generation Sport Pro MK1 cylinders became very popular among scooter tuners, then Stage6 took things to the next level and introduced the successor, the Sport Pro MKII.

The cylinder was completely redesigned; 6 instead of 5 transfer ports ensure optimized cylinder filling. The oval exhaust remained but was optimized as well. The appearance is based on the pentagonal shape of the R/T cylinders. The head is a one-piece unit with cast scavenging canals for better heat dissipation. The piston is a replica of the R/T piston, with a domed piston crown and 0.8 mm thick piston ring to optimise performance and improve thermal stability.

The cylinder delivers 2 to 3 hp more power than the MK1, between 14-17 hp, without any additional modifications and in combination with the corresponding components. Maximum performance and outstanding robustness - we are sure that this cylinder will set new standards in the tuning scene.

We recommend using a reinforced crankshaft, a min. 19mm carburetor and a sport / racing exhaust to exploit the full power of this tuning cylinder..

The kit includes.

  • aluminium cylinder, 47.6mm bore
  • 1-ring piston with 12mm piston pin
  • one-piece cylinder head
  • gasket set

We recommend to clean the engine before assembly, check the condition of all components and use a new spark plug and new small end bearing. Do not forget to change your carburetor settings if necessary.

Squish clearance should be between 0.75 and 0.85. The cylinder should be run in for approx. 300 km with a 1:33 mixture to improve robustness and life expectancy.


- Original exhausts cannot be mounted with this cylinder.
- The temperature sensor (including thread) may not be longer than 18mm, otherwise it may knock against the cylinder head.

WITHOUT HOMOLOGATION (in some countries)

Data Sheet

Name Stage6 Cylinder Kit 70cc Sport Pro MK2 12mm piston pin Minarelli horizontal LC (Yamaha Aerox)
Item No. S6-7416604
Brand Stage6
Street legal No
Homologation No
Displacement 70cc
Stroke Original
Conrod Length Standard
Product Line Sport
Material Aluminium
Bore 47,6 mm
Piston Pin 12 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)

2 Reviews - Total Rating

Best - Review by Dejan

Number one .strong and powerfull kit.nice production.clean finish.

(Reviewd on 2/4/2019)


Product review - Review by Hristijan

Excellent and cheap with best performances

(Reviewd on 10/22/2018)


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