FITS VESPA PX 125/150 ,COSA 125,SPRINT 3 PORT, LML 2 STROKE,

MALOSSI 178  sport 
The MHR cylinder range is aimed at the advanced tuner who wants to get the most out of his engine. A corresponding knowledge of the complex thermodynamic and mechanical processes in the engine is tacitly assumed here. A nice feature is the screw-on exhaust flange. This allows a further reworking of the exhaust port which can greatly increase the performance of the cylinder. Malossi states the achievable power at delivery with 21-28PS.

• Stroke x bore: 57xØ63mm
• Displacement: 177,59cm³
• Exhaust angle: 178,2°.
• Angle of overcurrent: 119.2°.
• Exhaust angle: 29,5°.
• Pinch point: 0.7mm (piston is 0.2mm back in the top dead center)
• Compression: 1:11,25
• Overcurrent channels: 7
• Piston rings: 1
• Ignition timing: 18° f.o.t.

A major revision of the original rotary valve inlet is recommended, better in terms of maximum performance and driveability is the conversion to a diaphragm controlled inlet. The BGM BigBox Sport or the RR-Box are suitable as exhaust systems. Both support the cylinder very well in the intended speed range and allow the full potential of the cylinder to be exploited

.MALOSSI 178 SPORT ALUMINIUM CYLINDER KIT - LARGE FRAME VESPA 125-150 WITH 3 PORT CRANKCASES. The aluminium Malossi SPORT (Touring) series finally arrives on the Vespa PX125-150 (also LML Star 125 2t) motors, with the all new 178cc cylinder kit, featuring nickel-chromium plated aluminium cylinder with 7 enlarged transfer ports, and a steel screw in exhaust stub, a very advanced light weight 63mm twin ring piston, and the very lastest design of cylinder head for optimal cooling running a compression ratio of 1:10.8. Malossi are this one will sure be a real performer and are quoting 18 to 25 bhp depending on the final set up. This 178cc kit (Malossi part number 3118005) and is for use with standard 57mm stroke crankshafts. Warning:the use of a fast flow fuel tap (VE13092) with increased capacity is absolutely necessary. Fitment LML STAR 125 2 STROKE VESPA 125 - P125X 1978-1981 VESPA 125 - PX125E 1981-1984 VESPA 125 - PX125E DISC 1998 ON VESPA 125 - PX125EFL 1984-1997 VESPA 125 COSA VESPA 150 - P150X 1978-1981 VESPA 150 - PX150E 1981-1984 VE