Mark from Ohio here, been through 4 bikes since last August and finally got a 2006 dl1000. Started on a shadow 600, went to an intruder 1500, then to an FJR, but always admired these bikes. Anyway what's with the bike at 3,500-4,000 rpm it's very hesitant and backfires if held in that range. Any other rpm range and it feels very strong but it's driving me nuts. Any help would be appreciated. Ride safe!