mxking stock bore is just the same as vixion bore kit (57mm)
you can still use 62mm or bigbore kits and use stock exhaust pipe.
just modify the tube make it bigger.
also you can use UMA racing silent pipe ...
im not really sure if its plug and play but most probably its just some spacer or if not maybe needs machining.
the only way to find out really is to have it install...
:-)
nice one bro!
even sprocket gear ratio post it, how i wish i post my previous sprocket ratio combi and speed before every test..
now i forgot most of it... :-)