Cylinder -POLINI cast iron 133 cc Racing- Vespa PV125, ET3 125, PK125

Preview: Cylinder -POLINI cast iron 133 cc Racing- Vespa PV125, ET3 125, PK125

Description

Polini has reworked the legendary 133 very gently. More was not necessary with the very sophisticated cylinder. The essential innovation concerns the cylinder head.
The bore of 57 mm has been kept and so with 51 cc shaft 130 cc and with 54 shaft 138 cc are available. The layout of the cylinder is unchanged and is determined by the six transfer ports.
The piston is made of die-cast, which gives it a very good durability at low weight.
The new head is made of cast aluminium with a high silicon content. It also has additional cooling fins on the bottom. This means that the heat is dissipated much better, both from the cylinder itself and from the head. The compression has also been slightly modified.
The new copper gasket not only conducts heat better, it also contributes to a significantly better seal between the cylinder and head.
Conclusion:Classics made even better!
Spark plug: long thread, e.g. NGK B9ES or Bosch W2CC
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Manufacturer Information
Polini
Viale Piave 30
24022 Alzano Lombardo Bergamo - Italy
https://www.polini.com/
info@polini.com/

Responsible Person for the EU
Polini
Viale Piave 30
24022 Alzano Lombardo Bergamo - Italy
https://www.polini.com/
info@polini.com/

€259.00 *

incl. VAT plus shipping costs

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

P For this item you get fidelity point/s

General
performance class:	sport
Gudgeon pins
diameter:	15 mm
Spark plugs
thread type:	M14x1,25
thread spark plug:	long
heat rating NGK:	B9ES
Cylinders
displacement:	130 cm³
bore:	57 mm
engine type:	2-stroke
type of cooling:	air cooled
material:	cast iron
material piston cylinder surface:	cast iron
cylinder head inclusive:
cylinder gasket set inclusive:
number of transfers (incl.boost ports):	7
number of boost ports:	3
shape exhaust port:	single port (oval)
exhaust mounting:	flange
flange type:	2 studs
exhaust bolt pitch:	52 mm
thread exhaust studs:	M8
Crankshafts
stroke:	51 mm
Pistons
number of piston rings:	2
production method piston:	cast
Piston rings
piston ring type:	common ring
thickness rings:	1,2mm
Circlips
circlip type:	G-type
wire size of circlip:	1,25mm
Cylinder heads
cylinder head type:	one piece
OEM numbers (for comparison purposes only)
Polini	P140.0050/R, P1400050R, 140.0050/R

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