Well in all fairness the engine doesn't have a reputation for a big bottom end.......I actually destroyed a clutch the first time we tested the Mod Bonito...... Due to all the reports of a soft bottom I clutched the mod engine very tightly.....And well lets say it didn't perform too well for us LOL the clutchbell turned blue and the shoes turned to slag ! took me a couple of tanks to realize what was happening, by that time the shoes were junked .....It ended up having a pile more bottom end then I would have expected, definitely caught me off gaurd..... ended up being a much different engine then I would have expected it to be........But it is a massive PITA to modify..regrinding all 7 intake ports is no joke ..and those sleeves are not cheap if the tool slips, and there is zero margin for error ! (found this comment online)