MasterTune Moto Suite

PW50 Gear Ratio Calculator

This tool shows engine RPM at a simulated 50 MPH to help preview whether you’re spinning the motor too fast. It’s not your actual speed — just a reference point to spot risky setups.

🔧 PW50 Safe RPM Zones

• Stock PW50: 7,500–8,200 RPM (⚠️ Danger: 9,000+)
• Rev Plate / Light Porting: 8,500–9,500 RPM (⚠️ Danger: 10,000+)
• 60cc Kit: 7,000–8,000 RPM (⚠️ Danger: 8,500+)
• Moped-Style Mod: 9,500–11,000+ RPM (⚠️ Danger: 12,000+)

Primary Gear Stock 33T Solid State 32T Rear Drive Gear PW50 11T QT50 10T Speed (MPH) ⚙️ Calculate RPM