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BGM Tuning

BGM PRO Vespa 177 Cylinder Kit PX COSA Sprint LML

Regular price £210.00 GBP
Regular price Sale price £210.00 GBP
Tax included. Shipping calculated at checkout.

The bgm PRO 177 cylinder is a hard ceramic coated aluminum cylinder with 63mm bore. The coating (nickel silicon carbide) provides an extremely hard and durable raceway.
The piston has a high silicon content. As a result, it has lower thermal expansion, is more wear resistant and thermally very stable.
Two 1mm thick piston rings minimize friction, increasing performance and speed stability.


Will fit:


The cylinder's port layout, with four main spill ports and two boost ports, is designed for plenty of low-end pressure.
Timing is 57mm stroke with 118° overflow to 171° exhaust angle.

The cylinder kit is designed as a plug 'n play solution, simply plugged in with SI carburetor and bgm big box touring the power is around 15hp and torque is 17 - 19Nm at the rear wheel.
With further expansion stages, 25 hp and more are no problem.

Low consumption values and the associated high range are another bonus

  • Cylinder material: aluminum
  • Raceway: coated with nickel-silicon-carbide
  • Bore: Ø 63mm
  • Displacement 57/60mm Stroke: 177/187 cc
  • Piston: cast piston with high silicon content and two 1mm steel piston rings
  • Recommended pinch point: 0,8- 1,2mm
performance class: sport
Gudgeon pins
diameter: 15 mm
Spark plugs
thread type: M14x1,25
thread spark plug: long
heat rating NGK: B9ES
displacement: 177 cm³
bore: 63 mm
engine type: 2-stroke
type of cooling: air cooled
material: aluminium
material piston cylinder surface: Ceramic
cylinder head inclusive:
cylinder gasket set inclusive:
number of transfers (incl.boost ports): 6
number of boost ports: 2
shape exhaust port: single port (oval)
exhaust mounting: stub
diameter exhaust stub: 37 mm
number of piston rings: 2
production method piston: cast
Piston rings
piston ring type: common ring
circlip type: C-type
wire size of circlip: 1,0mm
Cylinder heads
cylinder head type: one piece