Yamaha R1 Forum: YZF-R1 Forums banner


  1. 08 R1 - Intake Valve Replacement

    07-08 R1 Mechanical Help
    My Yamaha 2008 YFZ-R1 has done 26,000 km or 16155 miles. Its running really rough, starts on 3 cylinders, the fourth (unsure which one it is) cylinder fires up every now and then when riding and it feels ok when its firing, but still slightly under powered. At all other times it just runs on 3...