My older brother has owned several Harley's over the years and has a pretty good general knowledge. However he has been known to rain on a guys parade every now and then. What I mean is if you hear a small tick in your motor he's the guy that will say, "Man that sounds like a rod knocking, your probably gonna have to buy a new motor and you know those things are $10,000 new" You know worst case scenario guy.... I love him to death be he tends to blow shit out of per portion most of the time. So now that I've rambled, he was asking me the other day how I liked my mastiff. I told him it had killer torque and kinda scared the shit out of me in 4th gear at 7,000+ rpm. So he said "man you can't ride that thing like that your gonna blow that motor up. These engines aren't ment to be wound that hard". Then he asks how often have I twisted it that hard. To my reply was oh about three times today and I've only rode it about 20 miles. He then told me he never ever ran any of his bike over 3,000 rpm. To which my response was "well shit...that's no fun" So in your opinion what's so called safe rpm range. How often can or should you let your dog run? Me personally I love the way my bike feels when it starts to hit 4,000 and up the power really starts coming on strong. But on the other hand I don't want to sling parts all over the highway. If you have read this far without getting board please give your input.