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Genuine Roughhouse 50 - Master Maintenance & Torque Guide

The Genuine Roughhouse 50 shares its small-bore, air-cooled single-cylinder architecture with the wider Buddy platform, using a belt-driven CVT and a low-output stator to run its 12V ignition and lighting circuit. At this displacement, fastener margins are tight: torque values are deliberately low, which means the risk of stripping soft alloy threads is higher than on larger machines. A disciplined torque-wrench routine on the variator, spark plug, and stator bolts is what separates a Roughhouse that lasts for years from one that nickel-and-dimes its owner with recurring electrical and drivetrain faults.

⚡ Quick Maintenance Specs & Direct Answers

  • 2-Stroke Injection Oil: JASO FC/FD (1.2L Oil Reservoir Tank)
  • Gearbox Oil & Capacity: SAE 80W-90 GL-5 (90ml Refill)
  • Oil Filter / Strainer: Strainer Filter Screen
  • Air Filter: OEM # C1243500000
  • Spark Plug & Gap: NGK BPR7HS (0.6 - 0.7 mm gap)

For detailed top-end wrist pin and circlip failure analysis, consult the complete 2-stroke piston pin circlip ejection failure analysis guide.

Engine Fluids, Gear Oil & Filter Specifications

2-Stroke Injection Oil StandardJASO FC / FD (1.2 L oil tank capacity)
Final Drive / Gearbox OilSAE 80W-90 GL-5 — 90 ml (refill)
OEM Oil Strainer Part NumberStrainer Filter Screen
OEM Air Filter Element Part NumberC1243500000
Spark Plug Model & Electrode GapNGK BPR7HS (0.6 – 0.7 mm)
Field note: The Roughhouse 50 2-stroke engine relies on oil injection from a 1.2L oil tank. Always use high-grade JASO FC or JASO FD synthetic 2-stroke oil to prevent exhaust port carbon buildup and piston ring sticking. Final drive gearbox takes 90ml of SAE 80W-90 GL-5.

CVT Transmission System

ComponentCVT Drive Belt
OEM Part Number23100-111-000
Dimensions724 x 17.5 mm
Torque SpecDrive face nut: 40 Nm
Cross-CompatibilityGenuine Buddy 50
Field note: 40 Nm is a comparatively low variator nut torque, and mechanics used to larger CVTs often over-tighten it "to be safe" with an impact driver. This crushes the drive face bushing and can shear the crank's alignment key. Always seat the belt fully in both pulley grooves, torque with a calibrated wrench in one smooth pull, and never use an impact gun on this fastener.

Ignition System

ComponentSpark Plug
OEM Part NumberNGK BPR7HS
FitmentGenuine Roughhouse 50
Dimensions14mm thread, 12.7mm reach
Torque Spec20 Nm (14.5 lbf·ft)
Electrode Gap0.6 - 0.7 mm
Cross-CompatibilityGenuine Buddy 50
Field note: Torque spark plug to 20 Nm in the aluminum head. Verify electrode gap of 0.6-0.7mm using a feeler gauge prior to installation.

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