The carb deal is not a issue as much as it has been said to be, as with any motor maker that has a composite body and alum HSN housing it is prone to do this, it is easy to check for it, if it does leak seal where the housing meets the composite. i have only had 2 leak, but all of them are sealed by me befor they see the customer= as far as modded GO's. The 5 port will move a truggy with ease, some people just don't realize how strong they really are and the 7 is stellar as well, if you clutch it and pipe it right it can be as strong as the 5 or smooth if you like that feel, but i would go for a 5 they just rip
