Most of the pre-2004 ECBoy 50's are just TXT 50's with a sub frame welded on, fan removed and mx plastics added. The later EC and MC 50's (2005+) were a little different. One of the later models was even air cooled rather than liquid.
I was told they are Moto Minarelli based, but GG customizes the jug themselves and outsources the casting. There are some pretty nice performance tweaks that can be made to the motors - I think the guys at Rising Sun are privy to them. They have more experience with the TXT motors than the enduro dealers do.
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Todd A
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2003 EC/O 200
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