Cylinder -POLINI alloy 'reed mission' 152 cc (Ø60mm) Evolution Reed Valve (54mm stroke-Version)- Vespa PV125, ET3 125, PK125 - crankshaft P2100070 is required | Cylinders | Cylinder | Engines

Preview: Cylinder -POLINI alloy 'reed mission' 152 cc (Ø60mm) Evolution Reed Valve (54mm stroke-Version)- Vespa PV125, ET3 125, PK125 - crankshaft P2100070 is required

Description

Cylinder POLINI aluminum 152cc (Ø60mm) Evolution diaphragm (54mm stroke) for Vespa Smallframe PV125, ET3 125, PK125

From now on there is BIG EVO for the Vespa Smallframe. This means a whopping 152cc for the stock engine cases of the Smallframe models like V50, 50N, PV, ET3, PK etc.
With Ø60mm bore and 54mm stroke and already very ambitious head angles right out of the box, the Polini is a serious contender for the track.
Based on the very successful Polini EVO 133, Polini has put together a complete package based on cylinder, crankshaft and exhaust created for performance above 30hp.

Bore: Ø60mm
Stroke: 54mm
Displacement: 152ccm
Pinch dimension: 1±0,1mm
Connecting rod length: 105mm
Compression ratio: 14,2:1
Piston running clearance: 0,07 - 0,08mm
Exhaust shape: Two-piece
Exhaust angle: 194°.
Overflow angle: 130
pre-ignition: 20°
Spindle dimension left crankcase: Ø89,5 x 22,4mm
Spindle dimension right crankcase: Ø89,5 x 15,8mm
spindle dimension cylinder base bore in engine case: Ø:65,3x21mm
Crankshaft: P2100070 or comparable (54/105mm)
Exhaust system: P2000416 or comparable
Ignition: P1710554 or comparable
Ignition timing dynamic (with ignition P1710554): 4,8mm before the upper

piston dead center at 4500 rpm
Spark plug: NGK BR9EG or comparable

INLET KITS

The kit includes the complete intake system, consisting of large diaphragm inlet, intake manifold and connecting rubber. The 6-flap diaphragm is equipped with 0.4mm thick plate material. The intake manifold is designed to be used with a Ø34mm carburetor cross-section (carburetor connection size of the rubber is Ø44-45mm). Modifications may be necessary in the frame cutout area for the carburetor.

PISTONS
The kit uses the well known Asso piston from the Polini Aprilia AF1 kit, as already used by FALC Racing in their 153cc cylinders (we can highly recommend the very high quality Ø60mm Wössner piston from Overrev as an alternative).

CURB SHAFT
Any shaft with 54mm stroke and 105mm connecting rod length can be used as crankshaft. The connecting rod length not only benefits the better connecting rod ratio but also reduces the necessary housing adjustments for the overflow ports to a minimum.

SPINDLES
The engine case must be spindled to accommodate the required 54mm stroke crankshaft. Likewise, the receptacle for the cylinder base must be widened to Ø65.3mm with 21mm depth.

CYLINDER HEAD
The cylinder head is additionally, to the conventional screw connection over the continuous (longer, enclosed) cylinder stud bolts, screwed with 4 screws.

CONCLUSION: Very interesting alternative for normal engine cases to the often unavailable FALC Racing cylinders. Who is looking for performance in the range clearly above 25HP, will find it here!

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€739.00 *

incl. VAT plus shipping costs

Available immediately (delivery time 1-3 working days*)

P For this item you get fidelity point/s

OEM numbers (for comparison purposes only)
Polini	P1400227, 1400227, P140.0227, 140.0227

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