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Genuine Stella 2-Stroke - Master Maintenance & Torque Guide

The Genuine Stella 2-Stroke is a faithful reproduction of the classic Vespa PX-style air-cooled 2-stroke platform, using a flywheel-mounted stator and points-less electronic ignition instead of a mechanical distributor. Because ignition timing is physically set by the flywheel's taper fit on the crankshaft, this is one of the few components on the machine where torque accuracy directly governs running quality, not just longevity. Getting the flywheel nut torque right is non-negotiable for stable timing and reliable starting.

⚡ Quick Maintenance Specs & Direct Answers

  • 2-Stroke Injection Oil: JASO FC/FD (1.4L Oil Tank)
  • Gearbox Oil & Capacity: SAE 30 / SAE 80W Wet Clutch (250ml)
  • Oil Filter / Strainer: Mesh Strainer Screen
  • Air Filter: OEM # C200250000
  • Spark Plug & Gap: NGK B7HS (0.6 mm gap)

For 2-stroke engine top-end failure physics, consult the complete Genuine Stella 2-Stroke engine and 2-stroke piston pin circlip ejection failure analysis guide.

Engine Fluids, Gear Oil & Filter Specifications

2-Stroke Injection Oil StandardJASO FC / FD (1.4 L oil tank capacity)
Final Drive / Gearbox OilSAE 30 Non-Detergent / SAE 80W Wet Clutch Gear Oil — 250 ml
OEM Oil Strainer Part NumberCleanable Mesh Strainer Screen
OEM Air Filter Element Part NumberC200250000
Spark Plug Model & Electrode GapNGK B7HS (0.6 mm)
Field note: The Genuine Stella 2-Stroke manual transmission gearbox holds 250ml of SAE 30 non-detergent motor oil or dedicated SAE 80W wet-clutch gear oil. NEVER use friction-modified hypoid gear oil (GL-5) in this wet clutch gear casing as it causes severe clutch plate slipping and rapid disc degradation.

Ignition & Electrical System

ComponentStator Assembly (5-wire)
OEM Part Number219503
FitmentGenuine Stella 2-Stroke
Dimensions/Notes12V Electronic Ignition
Torque SpecFlywheel nut: 60-65 Nm
Cross-CompatibilityVespa PX150E
Field note: Under-torquing the flywheel nut below 60 Nm allows the taper joint to fret against the crankshaft over time, wearing the keyway and causing intermittent ignition timing drift — a classic "runs fine cold, cuts out hot" complaint. Over-torquing past 65 Nm risks cracking the flywheel boss. Always dry-fit the taper (no oil or thread lubricant on this joint), clean both mating tapers thoroughly, and torque in one continuous pull with the crank locked, not a series of impacts.

Official Technical Reference

The specifications above are cross-checked wherever possible, but this guide does not replace the factory service manual. Before ordering parts or performing a repair, confirm current fitment and revision bulletins directly with Genuine Scooter Co.

Visit Genuine Scooter Co. Official Site & Parts Resources