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Upgrade Kit Stage6 R/T 70cc Cylinder For 2.4mm Inner Cylinder Head Cap

Stage6 R/T Item no.: S6-75166UP71

Upgrade Kit Stage6 R/T 70cc Cylinder For 2.4mm Inner Cylinder Head Cap



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Data Sheet
Suitable for (46)


You are looking for an easy way to improve the performance of your Stage6 R/T cylinder? All you need is the upgrade kit suitable for your cylinder!

If you have, for example, a cylinder that comes with 2.4mm inner cylinder head cap, you choose the upgrade kit for this cylinder. It includes an inner cylinder head cap that reaches 4/10 deeper into the cylinder; this will be balanced with the base gaskets included in the delivery, so that the recommended squish band of 0.40mm remains unchanged. This simple modification raises the complete cylinder, and therefore also port timing.

If the cylinder has ~192° exhaust and ~127° transfer port timing out of the box, these will be increased to ~194° and ~130°. The result is a clearly measurable performance plus.

Also included in the kit is the spark plug (NGK nickel-alloy B-E10.5) we have listed as replacement part in the cylinder manual. Rarely has a spark plug convinced us like this; but thanks to this one, we’ve now managed numerous times to get a performance plus of a half hp on the dyno with different engines – simply by replacing the spark plug!

The flange included in the delivery has been conically machined off.

All in all, this is an amazing package that will boost your engine’s performance for a very fair price.

Tech tip: Using our port timing calculator, you can also (against our recommendation) choose another combustion chamber depth for your cylinder, depending on whether you want to raise port timing just a bit or a lot.

On the cylinder kit, next to the specification of the piston version (A, B, C), you will find which inner cylinder head cap is included.
Scope of delivery:
Inner cylinder head cap, base gaskets, spark plug, flange.
For 2.4mm Inner Cylinder Head Cap

Data Sheet

Name Upgrade Kit Stage6 R/T 70cc Cylinder For 2.4mm Inner Cylinder Head Cap
Item No. S6-75166UP71
Brand Stage6 R/T
Homologation No
Homologation Yes
Displacement 70cc
Stroke Original
Conrod Length Standard
Product Line Hyper racing
Material Aluminium
Engine Type 2-stroke
Cooling Type LC
Bore 47,6 mm
Cylinder Head Not included

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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