I recently purchased a 2002 banshee. The second owner claims that the original owner, (I am the third owner), had the motor bored 60 over to a 410. I didn't pay big bucks for it b/c there were no receipts to prove it. However the bike is extremely fast, and I just had is serviced and found out the barrings were completely trashed, and even with the bad bearings that bike was super fast. So I am wondering if this is in indicator of the bike having the motor work down.
Any tips or suggestions on how I can find out with out taking apart the motor??