RE: Katana 50cc
Cliffmandude
PM Andy or one of the other sales/support guys at rcdiscuss.com or go to their sales support forum.
They are VERY quick at getting back to people there.
I posted an inquiry about a small order problem and received a response and resolution within 2 minutes.
Your milage may vary.
Forget about calling them. RCdiscuss is the way to go.