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How is HP calculated?

2319 Views 21 Replies 11 Participants Last post by  dugsamin
How does Honda calculate the HP rating for the VTX? The 2003 VTX 1800R from what I can tell has 106 HP and 120 lbs of torque. Are these ratings at the rear wheel, or is it like with some car manufactures the "engine/flywheel" numbers? The reason I ask is that the previous owner of my bike had it dyno and it was rated at 112 HP with the following upgrades; aftermarket Pro-Charger, V&H Big Shot exhaust and PCIII mapped aggressively. Do the numbers sound about right?:hmm2:
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Bry, you could be right,'s possible,'s probable, and it's about time, :mosh: and why not? :bleh:

yep, almost 5 O'clock! :beer: (although it is 5 O'clock somewhere) :drunk::cheers::mosh:
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