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Message: [QUOTE="1998RM250, post: 1356835, member: 99032"] Hey guys I picked up an 07' RM 250. I got it from a kid who knew nothing about bikes, but the guy who owned it before was a pro ama rider and modded it. I've been running 93 with motul 808 premix 40:1 and the bike it stil bogging after cleaning the carb. It wont even really hit powerband before 3rd gear, bogs and fouls out plugs. When the powervalve opens it still doesnt seem to be running right either. The kid said he thinks the bike is bored out and the guy might have ran 110 ocatane. I also noticed the silencer packing is soaked in oil and it seems to be running rich... would race fuel make a difference, or my air fuel screw out of adjustment be causing these problems? :bang: [/QUOTE]