Crankshaft repair is it Expensive?

[motoman]

When I did safety Check on bike the mechanic herd a knoking sound when the bike is runing
he told next time you come in for maintenece I should repair the crankshaft is that an expensive repair Im new to riding :)

[raul10141964]

I,ll get a second opinion
crankshaft knocking is emergency no next time you come

[Water Warrior 2]

You may want a 2nd opinion on the knocking sound. I suggest you don't ride the bike until you have it checked again.