Malossi MHR Team 77ccm Cylinder Kit – Big Bore Performance for Minarelli AM

With the 77ccm MHR Team Big Bore cylinder, Malossi has also ventured into the class over 70 ccm displacement. The cylinder is based on the successful MHR Team cylinder – here the bore was increased to 50 mm. Through the displacement expansion to 77ccm, a power output of around 25 hp is achievable (depending on setup).

Especially for sporty builds on models such as Yamaha TZR 50, Aprilia RS 50 or Rieju MRT 50, this kit is a strong basis if you are uncompromisingly focused on performance.

Important: To install this cylinder, the cylinder base mounting must be bored out.

Features & Advantages

• 77ccm Big Bore – significantly more displacement than classic 70ccm setups
• MHR Team Basis – proven concept, expanded to 50 mm bore
• Performance potential up to approx. 25 hp (setup-dependent)
• For sporty/race-oriented setups on Minarelli AM / AM6 platform
• Installation note: Cylinder base mounting must be bored out

Technical Data / Details

• Displacement: 77 ccm
• Bore: 50 mm
• Cylinder basis: Malossi MHR Team (Big Bore variant)
• Achievable power: approx. 25 hp (depending on setup)
• Installation note: Boring out the cylinder base mounting required

Compatibility (Vehicles)

Suitable for the following vehicles (as specified):

• Aprilia: RS 50 AM6 engine 1994-2005; Tuono 50 AM6 engine; MX 50 AM6 engine; Classic 50 AM4 AM5; RX 50 AM6 engine 1999-2005
• Generic: X-enduro 50; TR 50 SM Competition One 2016
• MBK: X-Limit Enduro 50 2003; X-Limit SM 50 2000-2003; X-Power 50 2000-2003
• Malaguti: XSM 50; XTM 50; Drakon Naked 50
• Peugeot: XR6 50; XP6 Supermoto 50; XPS 50 Street; XPS 50 Track Enduro
• Rieju: RRX 50; RR 50; RS-1 50; Spike X 50; Spike 50; Drac 50 AM6 1997; Spike 2 50; MRX 50; MRT 50; RS-1 Evolution 50
• Yamaha: TZR 50 R1 R1 RR 2002-2003; DT50R 1D4 2C2 2C3 5BK 5EC SM X 1997, 2002

OEM Number (Comparison Number)

• OEM No. for comparison purposes: 3112386

Why Malossi?

Malossi has stood for high-quality tuning components with extensive development know-how for decades. Specifically, the MHR series is designed for maximum performance – ideal if you want to create a truly sharp setup from your Aprilia RS 50, Yamaha TZR 50 or Rieju MRT 50.