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ZYLINDER KPL.Ø 47 Alum.Bolz.Ø 12 BIG D.E

After much success with Piaggio crankcases, Malossi completes the task: Aluminium Ø47 BIG D.E.P.S. Cylinder and Head Kits are now available again!

The only CIAO/SI cylinders on the market with a split exhaust port and symmetrical transfer ports!!!!

Threaded type exhaust header offers two major advantages:

  1. Increased strength and the possibility for replacement due to failure.
  2. Possibility to increase the exhaust size hence increasing the performance.

These results are possible due to a smaller decompression valve, compared to the Piaggio original, which is supplied with the kit.

Centred, hemispherical combustion chamber.

Malossi aluminium BIG D.E.P.S. cylinder kits are the best balance between component performance and component durability! The BIG D.E.P.S. are designed and manufactured with the specific objective of obtaining high combustion efficiency, long life, and a reliability that suits the Malossi name.

Owing to the experience gained in the preparation of cylinder kits for racing, Malossi engineers have developed the thermodynamics of the aluminium cylinder kit to the fullest and designed the inner fluid mechanics of the cylinder kit with fanatical precision (see the transfer ports, exhaust and combustion chamber), thereby obtaining a high level of turbulence in the combustion chamber. The latter has permitted a substantial reduction in consumption and a drastic reduction in exhaust emission pollutants.

Technical data

  • Split exhaust port.
  • Symmetrical transfer ports.
  • Centred, hemispherical combustion chamber.
  • Smaller decompression valve.
  • Six transfer porting system.
  • Gravity casted cylinders utilizing permanent steel molds.
  • Hardened and tempered high silicon aluminium alloy.
  • Machined on numerically controlled high precision machining centres.
  • Cylinder liners are silicon carbide coated with a galvanic nickel matrix and diamond cross-honed to achieve very tight tolerances.
  • Heat exchange surfaces redesigned.
  • Exhaust and transfer ports designed and tested for maximum thermodynamic performance.
  • High strength cast iron rings, wear resistant chrome coated, ground and lapped.
  • Quality inspected for surface roughness and form.
  • Cylinder/ Piston matched sets selected for 0.010-0.005 mm fit.
  • 100% pressure checked.

Cylinder and head kit BIG D.E.P.S.: the perfect match for Malossi's crankcase!

OEM Nummern (dienen zu Vergleichszwecken)  31 7526 (MALOSSI)



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