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Malossi Cylinder Kit "Replica" 50cc aluminium Yamaha BW's / Slider

Malossi Item no.: M318565

Malossi Cylinder Kit "Replica" 50cc aluminium Yamaha BW's / Slider

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Data Sheet
Suitable for (32)


Malossi 50cc Aluminium "Replica" MBK Booster / Stunt- high-end 50cc kit for everyday road use, Replica version of the more powerful MHR kit.

The kit includes:

- Aluminium Cylinder with 6 transfer ports and exhaust port with boost ports
- One-Ring Piston, 10mm pin
- High-Compression Cylinder Head
- Gasket Kit (base, head, exhaust, reed valve)
- Reed Petals (2x) for MHR reed valve, carbon fiber

As a (Nikasil-plated) aluminium kit, it has plenty of power and can easily be considered one of top 50cc racing cylinders.

In combination with the right carburetor (minimum 17.5mm) and a sports exhaust, this kit can reach 8 to 9hp, favouring mid and high rpm.

It is street-legal (50cc).

You can also run this cylinder kit with a 12mm crankshaft, in this case you'll have to order the 12mm piston separately (item no. M348544).

Data Sheet

Name Malossi Cylinder Kit "Replica" 50cc aluminium Yamaha BW's / Slider
Item No. M318565
Brand Malossi
Homologation Yes
Displacement 50cc
Stroke Original
Conrod Length Standard
Product Line Racing
Material Aluminium
Bore 40 mm
Piston Pin Original

Your product goes with the following manufacturers and their models:

Adly (Her Chee)

Rapido 50cc


Amico 50cc AC (1991 - 1992)

Amico 50cc ac (after 1993)

Amico GL 50cc AC

Amico Sport 50cc AC

SR 50cc AC (before 1994) - Minarelli vertical


Pista 2 50cc AC

Pista 50cc AC

Scoop 50cc


Booster 50cc AC (1992 - 1999)

Booster 50cc AC (after 2004)

Booster Next 50cc AC (after 1999)

Booster Next 50cc AC (before 1999)

Booster One 50cc until 2013

Booster Rocket 50cc AC

Booster Spirit 50cc AC (before 2004)

Booster Track 50cc AC

Stunt 50cc AC

Stunt 50cc AC CAT (after 2004)

Stunt Naked 50cc AC


BW's 50cc AC

BW's 50cc AC (after 2004)

BW's Bump 50cc AC

BW's Easy 50cc 2013

BW's NG 50cc AC (after 1999)

BW's NG 50cc AC (before 1999)

Slider 50cc AC (before 2004)

Slider 50cc AC CAT (after 2004)

Spy 50cc AC

Target 50cc

Zuma 50cc AC

Zuma II 50cc AC

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