Is 2Fast Cylinder Kit 86cc stroke=44mm Yamaha Aerox / MBK Nitro compatible with my scooter?

Please check by brand (2Fast), model (TFAST025), and engine type. Not sure? Contact us — we’ll verify compatibility.

What is the price of 2Fast Cylinder Kit 86cc stroke=44mm Yamaha Aerox / MBK Nitro?

The current price is 0.00€. All prices are up to date as of 02 2026.

Is 2Fast Cylinder Kit 86cc stroke=44mm Yamaha Aerox / MBK Nitro an original 2Fast part?

Yes, we sell OEM and performance parts. The type of this product is listed in the description.

Does 2Fast Cylinder Kit 86cc stroke=44mm Yamaha Aerox / MBK Nitro come with warranty?

Yes, all items include manufacturer warranty according to the rules.

How fast do you deliver 2Fast Cylinder Kit 86cc stroke=44mm Yamaha Aerox / MBK Nitro?

Ships within 24h from LV stock. From EU stock it takes 4–9 days to Latvia, then 1–2 days in the Baltics.

Which payment options are available for 2Fast Cylinder Kit 86cc stroke=44mm Yamaha Aerox / MBK Nitro?

We accept bank cards, online banking, and invoice payments.

What is the SKU or article number of 2Fast Cylinder Kit 86cc stroke=44mm Yamaha Aerox / MBK Nitro?

Product SKU: TFAST025. It is also shown in description and specs.

Can I order 2Fast Cylinder Kit 86cc stroke=44mm Yamaha Aerox / MBK Nitro if it’s not in local stock?

Yes, pre-orders are possible. Usually 4–9 days to LV warehouse (depends on supplier).

What is the current discount for 2Fast Cylinder Kit 86cc stroke=44mm Yamaha Aerox / MBK Nitro?

2Fast Cylinder Kit 86cc stroke=44mm Yamaha Aerox / MBK Nitro is now available with a special discount in 02 2026. Price: 0.00€.

How long is the discount for 2Fast Cylinder Kit 86cc stroke=44mm Yamaha Aerox / MBK Nitro valid?

The discount is valid for a limited time in 02 2026, until the promotion ends or stock runs out.

Is the 2Fast Cylinder Kit 86cc stroke=44mm Yamaha Aerox / MBK Nitro discount automatically applied in the cart?

Yes, the promo price 0.00€ is visible immediately and applied automatically at checkout.

Not available

2Fast Cylinder Kit 86cc stroke=44mm Yamaha Aerox / MBK Nitro

TFAST025

2Fast

2Fast Cylinder Kit 86cc stroke=44mm Yamaha Aerox / MBK Nitro

Name: 2Fast Cylinder Kit 86cc stroke=44mm Yamaha Aerox / MBK Nitro
Brand: 2Fast
SKU: TFAST025
Availability: OutOfStock

Out Of Stock

0.00€

"2Fast" - a name that stands for excellent performance! 2Fast 86cc Cylinder Kit (44mm stroke / 50mm diameter) MBK Nitro / Aerox (Minarelli horizontal LC), also available as tuning kit (cylinder kit + crankshaft), only for Minarelli engines.

These cylinders differ from the "old" 47.6mm ones regarding several features:

Exhaust port is divided and bridged (no auxiliary boost ports).
Transfer ports were redesigned to match the new size.
50mm piston with 13mm pin (HQ Malossi piston Big Bore 86cc)
Designed for 90mm connecting rod, new cylinder head shape, etc..

It has to be used with crankshafts with 44mm stroke, a 90mm connecting rod and a 13mm piston pin (small end bearing 13x17x17.5mm). Definitely one of the most powerful cylinder kits available in this category, since it will give you 25/26hp out of the box, without any modifications!

To unlock the enormous potential of this kit, we recommend combining it with a 30mm carburetor (minimum), a digital internal rotor ignition and a "Hyper Racing +70cc" exhaust (the "2Fast 86cc exhaust" is probably the best exhaust to go with this kit).

NOTE: you'll have to mill in the crankcase to make room for the cylinder base and the 44mm crankshaft (instructions in manual).

Technical details

Article no.: TFAST025
Bore: 50 mm
Brand: 2Fast
Conrod Length: 90 mm
Cylinder material: Aluminium
Displacement: 86cc

Homologation: No
Piston Pin: 13 mm
Product type: Cylinder kit
Stroke: 44 mm
Tuning Level: High-end
Weight: 1,47 kg

Vehicle

Adly (Her Chee): AirTech 50cc LC;
Aprilia: Area 51 LC;Gulliver 50cc LC;Rally 50cc LC;Sonic 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.;
Benelli: 491 50cc RR LC (before 2003) - Minarelli horiz.;491 50cc RR Replica LC (before 2003) - Minarelli horiz.;491 50cc Sport LC (before 2003) - Minarelli horiz.;491 50cc ST LC (before 2003) - Minarelli horiz.;K2 50cc LC - Minarelli horiz.;
Beta: Ark 50cc LC - Minarelli horiz.;Eikon 50cc LC - Minarelli horiz.;Ycon;
CPI: GTR 50cc LC - Minarelli horiz.;
Garelli: GSP 50cc LC;
Italjet: Dragster 50cc LC;
Kreidler: Galactica 3.0 50cc LC;

KTM: Ark 50cc LC;
Longjia: Speedjet 50 LC 2-stroke;
Malaguti: 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);
MBK: 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);
Motowell: Crogen RS 50cc LC 2-stroke;Magnet RS 50cc LC 2-stroke;
None: None
Sachs: Speedjet RS 50cc LC;
Yamaha: 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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Return and exchange of goods within 14 days

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