I just bought a new left over 2007 150RB. I have not changed any of the carb. settings as of yet. My question is regarding the pipe at the exhaust port on the head. My question is this-The pipe becomes a "glowing red" color for about 6"of the pipe starting at the head exhaust. It becomes this hot only after a minute or two. It retains it's "red molten glow" for 15 seconds after the bike has been shut down. I have only ridden the bike on 4 short rides-5 minutes or less. It is very hard to start as well, so I am thinking that it may be an air/fuel mixture issue causing it to run lean and hot? Has any experienced this when their 150R was new?
Thanks for your feedback!