Dyno Result
 

Just had my stock K5 dyno'd at 9500 miles and got 71.9 bhp, 46 lb/ft (ft/lb?) torque. Is this the first case of a Japanese manufacturer claiming performance below the actual? Can't wait till the full system and filter goes on.

It could be, but more likely is that the variation between dyno operators and the dynos themselves can produce enormous differences.

Re: Dyno Result
 

That figure is way too high for a stock K5.

We are only seeing those sort of numbers of MiniTwins race bike with full M4 systems, K&N filters, etc. Even then only a handful of bikes are that powerful.

:( must be a very optimistic dyno then.

Re: Dyno Result
 

at the wheel or crank?

Also ambient temperture and altitude all come into the equation. I'm guessing we're talking stock motorcycles here. If not you can throw in a few more variables like.
engine state of tune
aftermarket vs stock exhaust efficiency
aftermarket air filter vs stock efficiency
condition of spark plugs
fuel octane used
Well anyway, a whole lot of stuff can make a difference to the final result.
Cheers!

You forgot the big one, temperature of the bike engine at the time of testing!

Engines loosen up with milage as well, so after a few thousand miles the motor's probably fit and healthy now, though I'd go with the others here and say optimistic Dyno.

That used to be the case, nowadays most jap stuff seems to loose a bit of power as the miles get put on, On the GSXR's etc it seems to be for proddy racing so there good out of the crate.

Have seen a GSXR1000 track only bike loose 10hp over the course of a year, well maintained, ridden hard but not abused, just lost power as the miles went up