NCY 1st Generation Transmission Power Pack for 125cc – 170i GY6 Scooters, ATVs, and Go KartsINCLUDES: Ultralight gold specially coated overdrive variatorFinned Aluminum outer drive faceUltralight large shoe racing clutchNew Style Ultralight drilled & vented clutch bell (99 grams lighter than previous NCY Bell)Dual range secondary slider1000 RPM compression springBall bearing compression spring seat12 Gram 18×14 Roller WeightsOur extremely popular Gen 1 GY6 transmission kit is now available again. This kit comes with the finned drive face, N style clutch bell, 1000RPM clutch spring, and all of the other goodies that have made our trans kits so successful. **Recommendations: Use a new belt with this kit. Use graphite or Moly grease when assembling**