i havve the 404cc vitos big bore kit with , cool headss, v force reeds, toomey t5's, k and n filter, 15 front sprocket, 340 main jets with 30 pilots 24cc domes also. I love this thing its great, lots of power all round. someone mentioned the coal hills i might take her up there during ther year and see how it runs. I recently jus installed mine and i have yet to get it in 6th gear so still doing a trial and run to get it running to its prime. u will not be dispointed with this upgrade mann also i have a fully ported motor