NOTE! This product is out of stock, but can be pre-ordered, this will extend the delivery time to 3-7 working days . (usually 4 working days) .
Malossi MHR Testa Rossa 70cc Racing cylinder
From Malossi's racing division comes one of the most advanced cylinders in their range – the MHR Testa Rossa 70cc . Specially developed for high-performance racing, this cylinder offers the latest in 7-port technology, similar to flange-mounted versions from Malossi.
The exhaust design has been significantly upgraded with thinner fins and larger oval ports, reducing piston ring stress and improving gas flow. A reworked combustion chamber ensures higher torque across the entire rev range.
To maximize performance, Malossi recommends using specifically matched engine parts designed for this cylinder.
Technical Data:
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Bore: 47.6 mm
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Stroke: 39.3 mm
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Piston pin: 12 mm
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Piston ring: 47.6x0.8 mm
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Needle bearing: 12x17x16 mm
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Squish: 0.45-0.5 mm
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Stud pattern: 50 x 50 mm (M7) - Fits original Minarelli blocks
( For Malossis C-One and RC-One: use MAL-3115385 or MAL-3115883 )
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Ignition advance: 16° (with original ignition)
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Compression ratio: 1:15.8
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Max power: 24 hp at 14,000 rpm
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Max torque: 14 Nm at 13,800 rpm
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Recommended carburetor size: 19–24 mm
Important Recommendations and Requirements:
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Crankcase modification required : Drilling and porting of the crankcase is necessary.
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Compatible parts:
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Crankset: Malossi 538855 or 5315973
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Exhaust system: Malossi 3216832 Scooter Racing MHR Ø 47.6 Big Bore
This cylinder is designed for serious racing applications and should only be used on designated tracks or competition areas. Optimal performance and precision from Malossi for the serious racing driver!
