The reasons are from my dealings with them.. (all been discussed here before) The basic story is ordering parts, being told over the phone that the parts are in stock, credit card charged, then no parts for 3 to 4 months, no answering the phone, no call back after leaving countless messages, then when I finally do talk to someone I'm told every excuse in the book, parts finally arrive you feel better, give Don the benefit of the doubt, order more parts and go through the same process all over again!!!! You know just the basic stuff!!
If you have had good luck with them great, but that was my experience with them...
Maico only also can get some of those hard to find parts.