Vespa PX Rally Sprint Super VNA/B VBA VBB Super GT/R PINASCO 251cc Slave Reed Valve Intake Engine Kit

Product Code: BD15731


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The Pinasco 251ccm engine kit is suitable for all Vespa large frame models such as Vespa PX, T5, Sprint, TS, Rally, Super, GT, GTR, VNA, VNB, VBA, VBB. Also suitable for the Spanish Motovespa such as CL, DN, DS, TX, PX, GS, Sprint, GT160 as well as the licensed models of LML / Stella. So the cubic capacity of a 125ccm vehicle can be doubled without being conspicuous on the outside. Pinasco states the performance with up to over 30PS, this is of course strongly dependent on the components used such as exhaust and carburetor. A paradediscipline of the Pinasco 250ccm engine is its very quiet running and its good pulling power.

The housings are manufactured in two versions:

  • bore:Ø73mm

  • stroke: 60mm

  • capacity: 251ccm

The housing is based in its basic features on the Vespa T5 engine housing.
It therefore has a wide and therefore stable crankshaft. The enclosed Pinasco crankshaft has a toothing on the clutch side. Therefore, only the Pinasco clutch (also included in the set) can be used.

Crankshaft bearing on the alternator side is designed as a large roller bearing (NU205 25x52x15mm)

Shaft seal ring
The housings are manufactured to accommodate a metal shaft seal ring (clutch side). Here please always use the version for the 200cc versions with brown sealing lip.

Double lubrication hole for the LIMA bearing

Two additional shim bushes = crankshafts with extra long stroke can do without the centering edge of the lima half. Dimensions shim bushes AØ=9,95mm, IØ=8,40mm, h=13,80mm

The version with diaphragm inlet offers a very large inlet cross section. This makes it perfect for all those who want to get the maximum performance out of the set by means of a large carburettor and a corresponding exhaust.

  • Middle, full-surface membrane inlet

  • Incl. membrane intake manifold, incl. Diaphragm in RD350 format (perforation 58x48mm)

  • intake rubber 360° rotatable, connection width carburettor= Ø34mm

  • rubber suitable for Keihin PWK28, Mikuni TMX27/30, Dell'Orto PHBH28/30, VHS24- 30

  • No axis for oil pump control cast in

  • No bore for oil pump drive