Reply To: Miss and backfire under 5k only after engine warms up – 2009 GT650R Feb 26, 2025 at 8:18 AM #18983 Mark de Rooy👤 Member🖊 Topic Author Topics: 5Replies: 64 The starting I know is a separate issue. I tested my coils , lead and caps  Front lead plus cap : 22.50. Cap is 7.52.   Rear: 18.55. Cap is 4.88. Will this cause the rough idle and misfire down low?
