Need Help Quick

[250-R-250]

I looking for a big bore, and this might be my answer, http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&category=43977&item=4563076919
Whats this and does any one have any experience with it? Should I go for it

[XCredrider]

i would go for it. That thing is amazing. I dont know about them but it still looks like a pretty bad cylinder.