R, 50 Special models

Name: Exhaust -DEXTER RACING- Classic Box 3.0 Ø32mm- Vespa Smallframe V50, 50N/L/R, 50 Special models
Brand: DEXTER RACING
SKU: DEX50N32
Price: 269.00 EUR
Availability: InStock

Torque from the bottom, coasting >9 000 /min

No short 4th gear required (wide band)

O-ring manifold (tight & easy to service)

Tires: 3.00-10 / 90/90-10; close to stock volume/optics

Variant Ø28 mm: 75-112/115-130 cc (short stroke/classic setups)

Variant Ø32 mm: ≥133 cc and powerful setups

269,00 €*

available immediately

Shipping weight 3,62 kg

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Dexter Racing × W1R "Classic Box 3.0" - Smallframe Exhaust Ø28 / Ø32 (50-144 cc)

Box system developed in collaboration with W1R - WhiteOneRacing. Delivers rich torque from the bottom like a Proma "banana", revs out significantly further and achieves higher peak power. Two versions: Ø28 mm for short-stroke 75-112/115-130cc, Ø32 mm for 133 cc and larger. On conventional setups, >9,000 /min can be easily achieved.

Characteristics

Box layout with short diffuser section: early pressure build-up, good speed stability

Broadband layout - stable connection of the upper gears

Comparison with the Proma: similar acceleration, but more peak power and higher revs

Reduced noise level with close-to-production look

Technical data & variants

Versions: Ø28 mm manifold for 75-112/115-130 cc, Ø32 mm for ≥133 cc

Tires: suitable for 3.00-10 or 90/90-10

Fitting: without frame work on 50 Special / V50 (N/L/R), PK (S/XL/XL2), HP/FL2, ETS; also fits 125 Primavera frame with glove compartment

Manifold connection: O-ring sealed (plug-in system)

Gearbox: usable 4th gear - short 4 usually not required

Compatible vehicle models (selection)

Piaggio Smallframe - classic models

V50 (N, L, R), 50 Special

V90, 90 SS (Super Sprint), 50 SS

100 / 100 Sport, 125 Primavera, 125 ET3

Piaggio Smallframe - PK, HP/FL2, ETS

PK 50/75/100/125 S

PK 50/125 XL, PK 50/125 XL2

PK 125 ETS, PK HP / FL2

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

Fitting instructions

Installation without cutting on V50/50 Special (short & long stroke / 43 & 51)

Fits ET3/125 Primavera chassis with glove compartment

Tire clearance given with 3.00-10 and 90/90-10; check brake/suspension travel for special rims

Performance character (dyno note)

Comparative measurements, e.g. on Polini 130 twin intake, show the typical box characteristics: early torque, clean mid-range and sustained revving - higher peak power and more rev reserve compared to a Proma.