Ebay 330 kits

[300ridr]

Are the 330 kits on ebay any good? i want the one with a JE piston, it has like 11.5.1 comp, so will it require race gas? heres the link:
http://cgi.ebay.com/ebaymotors/HONDA-TRX300EX-330CC-JE-BIG-BORE-CYLINDER-KIT-TRX-300EX_W0QQcmdZViewItemQQhashZitem35a47b402fQQitemZ 230392807471QQptZMotorsQ5fATVQ5fPartsQ5fAccessorie s

[raptor660103]

i have 43 hours on mine and not a bit of trouble