Originally Posted by Rift
Gears move the tire HP has nothing to do with the top speed that gear can spin a tire only how fast it can get there. Unless there are changes made to the gears a bike with more hp is still limited by the stock ratio for top speed. You'll get to the top speed faster but if you had two bikes both running at top speed if your bike has 200 hp a bike with 50 hp could catch you eventually if it has the gears to allow it.
In a vacuum and in frictionless environment this would be true, but if the bike is already struggling then adding HP would in fact increase its top speed. The Fd is directly proportional to velocity squared, so the faster you go the more drag is created and the more HP is required to overcome said drag.
So the 50HP bike may not ever reach its top speed because at those speeds the bikes does not have the power to overcome the effect of drag and reach its mechanical potential, where as the 200HP bike will not only get you there faster but has the power to overcome drag.
Add the effects of friction to drag and you have compounded this even further.
On the VRSC if the rider is a skinny stick then it does not matter but if you are packing some weight and feel like a drogue chute on the interstate at 70MPH then it is likely you will see an increase in top speed. Albeit not much.