The nice thing about B7's is that they run well with a number of different pipes. I would go with a JP-1 for truggy use. The JP2 is popular for buggies. I like the OS 2050. Great power top to bottom and 9-10 minutes of runtime in my buggy.
"I have no idea what you're talking about, so here's a bunny with a pancake on it's head."
In mind and body, we're all heading towards old age. It is slower to go by bike.