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DEXTER RACING Item number: DEX60202
DEXTER RACING

Exhaust - DEXTER RACING Junior - Vespa Smallframe 100-144 cc - V50, 50 Special, ET3, PV125, PK 125 S/XL/XL2/ETS, Motovespa PK 75/PK 125, Primavera 125 T3

Key advantages - DEXTER RACING Junior

Handmade all-round system from Italy
Early, high torque - wide band up to >10 000 /min
Generally no short 4th gear required
O-ring sealed manifold - tight, service-friendly plug-in system
32 mm manifold ID, exhaust studs 52/56 mm
Clearance for 3.50-10; no cutting to fit the Smallframe frame mentioned above
Compatible with Smallframe cylinders 100-144 cc
Plug & Play compatible, facilitates tuning
329,00 €*
available immediately
Shipping weight 3 kg
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Dexter Racing "Junior" - Exhaust system Smallframe 100-144 cc

Handmade all-round system from a small Italian tuning manufacturer. Designed for early, high torque with a wide usable speed range up to over 10,000 rpm. Suitable for 100-144 cc cylinders. O-ring sealed manifold connection.

Advantages and key data

Wide speed range - generally no short 4th gear required
Early, high torque - strong plug & play tuning without gearbox intervention
Cylinder 100-144 cc, exhaust studs 52/56 mm
Manifold inner diameter 32 mm, O-ring plug-in connection
Clearance for 3.50-10; no cutting to the specified frame necessary

Characteristics and advantages

All-round layout: powerful torque output from below, usable up to >10,000 /min
Broadband - usually no short fourth gear required
Suitable for plug & play setups; no frame work on the models listed below
O-ring manifold connection as a tight, service-friendly plug-in system

Technical data and compatibility

Cylinder: 100-144 cc, exhaust stud spacing 52 / 56 mm
Manifold inner diameter: 32 mm
Tire clearance: designed for 3.50-10
Installation: without cutting/milling work on Smallframe frames Special, ET3, Primavera, PK, HP, FL2, ETS

Compatible vehicle models (selection)

V50 (N, L, R), 50 Special, 50 SS
V90, 90 SS (Super Sprint)
Vespa 100 / 100 Sport
125 Primavera, 125 ET3
PK 50 (N/S/Rush depending on market), PK 50 XL, PK 50 XL2
PK 80 S (DE), PK 100 S (depending on market)
PK 125 S, PK 125 XL, PK 125 XL2
PK 125 ETS

Not suitable: PK "Automatica" (80/125) - different automatic engine/exhaust system.

Primavera 125 (Motovespa), Primavera 125 T3 (= ET3)
PK 50 XL / PK 50 XL2
PK 75 S, PK 75 "Junior", PK 75 XL, PK 75 XL2
PK 125 S, PK 125 XL, PK 125 XL2
Other Spanish Smallframe derivatives with identical Smallframe engine

Notes on tuning and assembly

Match the carburetor/jetting setup to the cylinder and intake system; the wide band makes adjustment easier
Clearance for 3.50-10 given; check for other wheel/tire combinations
Clean sealing surfaces, lightly grease O-ring, align plug connection without tension

FAQ - Frequently asked questions about the "Junior" exhaust system

As a rule, no. The wide-band design provides sufficient connection in fourth gear; a short 4th gear is not usually necessary.
Smallframe cylinders in the 100-144 cc range with 52 mm or 56 mm exhaust studs (e.g. Polini, Malossi, Pinasco, Quattrini - depending on the version). Check stud bolt spacing before ordering.
No. Automatica models (80/125) have a different engine and a different exhaust system.
No cutting is required on the smallframe frames mentioned (Special, ET3, Primavera, PK, HP/FL2, ETS). Check clearance for special parts (e.g. wide rims/tires).
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