anyone tested many pipes and found more economoical ones ,am running truggy and axe 25 and jp1 and having trouble getting 7 mins as there are some pipes that can give heaps more run time but experimenting would be way too costly ,,obviosly a low end pipe like jp1 would suck more fuel in theory ??
It depends. I got better runtimes on my Werks B7 with a JP1 than with an 053...