High Performance CDI Box Yamaha YFM 200 Moto 4 YTM 225 Tri-Moto 1983-1989 YFM200 YTM225 OEM Repl.# 29U-85540-21-00 Our PeakRPM technology provides a more aggressive timing curve for increased throttle response. Ride at full throttle with our application-specific CDI box that raises the rev limiter by 1000 RPM. Enjoy fast & easy installation with our plug & play design and included dielectric connector grease. OEM-grade electronic components and printed circuit boards for long-term reliability and performance 90% of ignition issues are caused by a faulty stator. Check product details before buying this part.