I've also been thinking of what it would be like to do the BB but as I've got an 865, and I see a lot of blokes doing the work on their 790's, where does that leave us with the 865's. For instance we are only really talking about 40cc not 115cc difference. So my question is, is it worth it for me to do the BB? Also, what are the other options that can be done once the motor is apart, like bigger ports etc. I reckon we also may be able add to the mix, mikuni carbs when Pat has time to sort them out thereby having another option for more power and torque. For me then, being able to milk all the performance out of my sm using safe and well researched options to give maximum output, would be a great goal to look forward to but I'm just not sure yet what those options are. Is there anyone who can give me a bit more info on what they would do in my situation to get the best performance? I'm not planning on doing it now but I would like to know what my options were for the future.