ORIGINAL: vicman
I have experienced bearing failure with a 9X6. [:@]
9X7 or even 9X8 is no prob for the .46.
Other than the bearing issue a 6-32 threaded rod and jam nuts mod to the muffler it's an excellent engine. I put on even par with the .46FX.[sm=thumbup.gif]
I'd put the TT ahead of the OS. At least the TT won't spit its liner-plating out the exhaust port :-) (stands back and waits for the liner-peeling argument to resurface :-)
What's your issue with the muffler bolts? I've had *zero* problems with any of my TT46Pros -- although the first thing I do is swap the stock muffer out and use a Tower/GMS 3-piece one instead -- that gives them a real wake-up and puts them well ahead of a stock OS 46.