Engine block Malossi MHR RC-One 100cc – Piaggio / Gilera

Description

Engine block Malossi MHR RC-One 100cc – Piaggio

High-performance Malossi MHR 100 RC-One engine block is developed specifically for the most demanding Piaggio 2T Racing configurations and use with the Malossi MHR 100cc system.

The block is specifically designed for the Malossi MHR 100 Flanged Mount Testa Rossa cylinder and allows installation without additional milling or modification of the block. All important parts are precisely CNC machined, so the block is ready for assembly.

The MHR 100 RC-One system is designed for engines where power, according to the manufacturer, can exceed 35 HP, when using suitable Malossi Racing components.

Technical specifications

• Manufacturer: Malossi

• Series: MHR 100 RC-One

• Type: Racing engine block

• Material: high-strength aluminum-silicon alloy

• Manufacturing: die casting and CNC machining

• Weight of engine cases with silent block: 5.250 kg

• Distance between crankshaft axis and clutch axis: 270 mm

• Crankshaft bearings: 20 × 47 × 14 mm

• Oil seals: FKM

• Reed valve block: Malossi VL18

• Intake manifold: X360 Ø21–28 mm

• Intake manifold length: 27 mm

• Cylinder bolts: steel 8.8 UNI EN20898/1

• Coolant connection:

  • outer diameter: Ø18 mm

  • inner diameter: Ø13.5 mm

• Wheel axle bearing: 20 × 47 × 14 mm

• Transmission cover needle bearing: 16 × 22 × 12 mm

Designed for MHR 100cc

MHR 100 RC-One is intended exclusively for use with Malossi cylinders with Flanged Mount attachment.

It is specifically developed for:

• Malossi Ø52 MHR 100 Flanged Mount Testa Rossa

• modular cylinder head

• Malossi cylinder catalog number: 3118679

• Malossi RHQ crankshafts with a 47 mm stroke

• connecting rod length of 100 mm

The inside of the block is already factory-dimensioned for long-stroke crankshafts, so with the intended configuration, no additional machining of the block is required.

RC-One 100 special features

• Allows the use of drum or disc brakes.

• Suitable for short and long wheelbase versions.

• Allows configurations with 12″ and 13″ wheels.

• The rear shock absorber mounting position is adapted to different versions.

• Intended exclusively for compatible Malossi Flanged Mount cylinders.

• Allows the use of long-stroke crankshafts without additional milling of the block.

• Intended exclusively for Malossi MHR and MHR TEAM inner rotors.

• Designed for use with an electric water pump.

• The mechanical water pump has been removed, eliminating its mechanical resistance.

• No automatic oil mixing system.

• Prepared for use with a vacuum fuel pump.

• Equipped with a larger VL18 reed valve block.

• The intake system design was developed using 3D flow simulations.

Kit includes

• Pair of Malossi MHR 100 RC-One engine cases

• Silent block

• VL18 reed valve block

• X360 Ø21–28 mm intake manifold

• Appropriate engine block components as specified by the manufacturer

Suitable for

Suitable for

Aprilia

• SR 50 2T LC – carburetor, from 2004 onwards – Piaggio engine.

• SR R 50 2T LC Euro 4 – from 2018 onwards – Piaggio CA81M.

• SR R 50 2T LC – carburetor, Piaggio engine.

• SR Street 50 2T LC Euro 2.

Derbi

• GP1 50 2T LC.

• GP1 Open 50 2T LC.

• GP1 Revolution 50 2T LC.

Gilera

• Runner SP 50 2T LC – up to 2005.

• Runner SP 50 2T LC – from 2006 onwards, C451M.

• Runner 50 2T LC.

Piaggio

• NRG Power 50 2T LC Euro 4 – 2018–2020, CA71M.

• NRG Extreme 50 2T LC.

• NRG MC2 50 2T LC – up to 1997.

• NRG MC2 50 2T LC – from 1998 onwards.

• NRG 50 2T LC.

• NRG MC3 DD 50 2T LC.

• NTT 50 2T LC.

• NRG Power DD 50 2T LC.

• Quartz 50 2T LC.

• Zip SP 50 2T LC – from 2001 onwards.

• Zip SP 50 2T LC – up to 2000.

Important

The Malossi MHR RC-One 100cc engine block is intended for Racing conversions of the models listed above or configurations where a compatible Piaggio engine can be used. This is not a conventional stock replacement engine block, but a dedicated MHR 100cc Racing system, so compatibility of all other engine components must be checked before assembly.

Important

This is not a conventional replacement block for a stock Piaggio engine, but a dedicated Racing block for MHR 100cc configurations. It requires the use of compatible Malossi MHR 100 system components.

The block has no automatic oil mixing system and is designed for an electric water pump. Therefore, the entire engine configuration must be adapted to the requirements of the RC-One system before assembly.

The power figure of over 35 HP is a manufacturer claim for a properly assembled MHR 100 Racing configuration and does not represent guaranteed power for every assembled engine.