back

Show all articles from: Exhaust

BGM PRO Item number: BGM1050PK

FL2)

5 Ratings

Made in Spain

Significantly more torque and top speed than the standard exhaust

Early onset of power - ideal for city and country roads

Wide rev range, no shift gap between gears

Discreet acoustics with a near-standard look

Simple installation without modifications to the vehicle

139,00 €*

available immediately

Shipping weight 3,15 kg

Information on product safety

Report error

BGM PRO BigBox TOURING - Box exhaust system for Vespa PK 50-80 cc

Unobtrusive box exhaust system with near-series look, early torque and wide usable power band. Suitable for Piaggio PK 50-80 cc (incl. PK 80) as well as for Motovespa PK 50 cc and Motovespa PK 75 XL/FL. Not suitable: Motovespa PK 75 S and PK 75 Junior, PK Automatica.

Piaggio PK 50-80 Motovespa PK 50 / 75 XL/FL Touring character Early torque Wide band Near-series look Handmade in Europe

Characteristics and use

Box layout: early, high torque with moderate volume

Harmonizes with standard engines and short-stroke tuning up to approx. 115 cc

Clean shift connection up to the highest gear

Unobtrusive outer shape for everyday road setups

Technical data and special features

Split manifold with tension springs - quick body removal

Near-standard fit, installation without frame modifications

Tuned chamber geometry for efficiency & quiet running noise

Recommended jetting: initial main jet +2 to +4 compared to standard

Compatible vehicle models (selection)

Piaggio Smallframe - PK series (50-80 cc)

PK 50 S / PK 50 XL / PK 50 XL2

PK 80 S / PK 80 XL

PK50 HP / PK50 FL / PK50 FL2

Not suitable: PK Automatica (different engine/exhaust flow).

Motovespa - Spanish license builds

PK 50 XL / PK 50 XL2 (all 50 cc)

PK 75 XL / PK 75 FL (incl. FL2)

Not suitable: PK 75 S and PK 75 Junior. Requirement: Shift smallframe engine.

Fitting and tuning

Installation without modifications to the PK frame or engine housing

Manifold can be detached via tension springs, body can be removed separately

Sealing compound at the manifold/body transition keeps the connection clean

Finalize carburetor tuning after test ride/plug pattern

Scope of delivery

Exhaust body

manifold

Tension springs

Gasket cylinder/manifold

FAQ - Frequently asked questions about the BGM PRO BigBox TOURING (PK 50-80 cc)

Is registration/TÜV approval required?

No E-marking. The requirement for registration depends on national regulations (individual approval if necessary).

How should the jetting be adjusted?

Starting point: Main jet +2 to +4 compared to standard. Then fine-tune using spark plug pattern/AFR.

Is frame work necessary?

No. The box is designed for the PK frame geometry and fits without modifications.

For which models is the box suitable?

Piaggio: PK 50, PK 80 incl. S/XL/XL2/HP/FL/FL2. Motovespa: PK 50 (XL/XL2) and PK 75 XL/FL (incl. FL2) Not suitable: Motovespa PK 75 S / PK 75 Junior and PK Automatica.

This is how we ensure, that reviews come from real consumers.

Christian R. from Kammeltal 05/23/2025

Die Box hat wirklich eine schöne Leistungsentfaltung. Die Box ist natürlich lauter als der Original Auspuff, aber noch völlig im Rahmen. Die Passform ist leider nicht zufriedenstellend, es muss ordentlich nachgearbeitet werden, was ich bei einem Premiumprodukt anders erwarte

Anonym 11/26/2020

Top Auspuff
Unauffällig. Top Leistung.

Anonym 11/26/2020

Exhaust

Andreas D. from Essen 05/12/2025

Michael S. from Rheinbach 09/30/2025

Rate this product now

Leistungsdiagrammjpg