Durable mmet and exceeds OE Standard. Sometimes, your ignition Coil and flywheel magneto Etc electrical components need to be tested as well after installation, to ensure the safe and performance The KIPA CDI Fits yamah YFM250, It will completely remove the factory OE redline to unlimited and it also adds a little more timing to boost performance. MPN: Replace For Yamaha OE Part Number 4BD-85540-10-00, Z021-0045N, 0451018, 0452187 Buy KIPA CDI Box For Yamaha Bear Tracker 250 YFM250X 1999 2000 Timberwolf 250 YFB250 1994 1998 YFB250FW 4X4 1994 2000 # 4BD 85540 10 00 Durable Replace OE Part Number: 4BD-85540-10-00 Z021-0045N, 0451018 0452187 Compatible vehicle: Fits for 2000 Yamaha Bear Tracker 250 YFM250X 1999 Yamaha Bear Tracker 250 YFM250X 2000 Yamaha Timberwolf 250 YFB250FW 4x4 1999 Yamaha Timberwolf 250 YFB250FW 4x4 1998 Yamaha Timberwolf 250 YFB250FW 4x4 1997 Yamaha Timberwolf 250 YFB250FW 4x4 1996 Yamaha Timberwolf 250 YFB250FW 4x4 1995 Yamaha Timberwolf 250 YFB250FW 4x4 1994 Yamaha Timberwolf 250 YFB250FW 4x4 1998 Yamaha Timberwolf 250 YFB250 1997 Yamaha Timberwolf 250 YFB250 1996 Yamaha Timberwolf 250 YFB250 1995 Yamaha Timberwolf 250 YFB250 1994 Yamaha Timberwolf 250 YFB250 Yamaha Bear Tracker 250 Parts CDI Igniter Fit For Yamaha YFB250 Timberwolf YFB250FW YFM250X SL Yamaha Bear Tracker 250 Carburetor Make sure all the wires are far away from heat and well-settled in the position.