Hello. I’m new here and unfortunately I found nothing on the subject. First information about my motorcycle It has run a Suzuki gsx 650 f built in 2008 22000km. Do not banish everything original except the turn signals and handles. Now to my problem. The machine runs so well. Jumps immediately. No side noises or similar. Unfortunately, she has the problem when she has driven warm she has a strange mute in the 5th and 6th gear. In these gears at a speed of 4000 to 5000 . I go off the gas it goes as strongly into the engine brake as if you turned the key and it turned out. When I give it back gas it rises so hard that the real blows are transferred to the chain. But that only at 4000 to 5000 revolutions and only in 5 and 6 gears. In the cold state everything is ok. Only when it gets warm it starts. Was already in a motorcycle workshop and my cynd candles and air filters. Has it also changed. Mistakes is still there. Can often j help us out?