Originally Posted by thamar
is it me, or are bikes tuned down in the uk?
cus the R1 here has 150bhp and has a top of about 300km/h (+/-190mph)
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No the bike is not tuned down in the UK.
The different results i bhp varys depending a lot on the different ways of measuring it (SAE-corrected, DIN, STD & Uncorrected).
For example a friend of mine tested his 1400cc modified Hayabusa with the following results:
SAE = 212,1
DIN = 219,3
STD = 218,2
Ucorrected = 219,1
Plus the fact that Yamaha measured the output on the crankshaft not the backwheel. TWO made their measurments on the backwheel.
But what I find a little intresting is that they got the number at only 9900 rpm. The top bhp output usually is somewhere around 10500 rpm.
Most unmodified R1:s give somewhere around 135-145 bhp on the backwheel.
With a dynojet-kit and a slip-on you should get 140-150 bhp on the backwheel.
The topspeed of an Unmodified R1 is somewhere around 275-285 km/h. That's real speed and not the false speed that the speedometer shows.