150 hp at the crank sounds about right. i think the '01 929 generally puts out anywhere from 125-130 at the rear wheel (which is the more useful figure), and you can expect (in general) around 15% losses from the crank to the rear wheel. 150 hp at the crank, adjusted for 15% parasitic losses, is 127.5 rwhp. the only reason manufacturers publish hp figures at the crank is because it's a larger number, and if they don't, someone else will. and the environment in which factory dyno runs are performed are very closely monitored. they want their peak figures as high as possible (for advertising purposes) so they make sure the temp, humidity, atmospheric pressure... everything... is optimum for the engine to produce as much hp as possible. i tell you all this because some people inevitably take their bikes to a shop with a dyno and come away pissed off that they can't get close to matching the factory-published figures. another factor is the type of dyno used... different dynos will yield different numbers. what's most important when dyno tuning is establishing a baseline and improving as much as possible from there, and trying to get a solid spread of power throughout the engine's useful RPM range, not so much trying to get the highest peak figures possible.

 

After I had my exhaust put on it was dyno tested at 127.3 which seems kinda low

 

Mine was dynoed at 136hp at the rear wheel with a PC3R, and afull titanium Akropovic exhaust. I have also dropped one in the frontand added 2 to the back with the 520 conversion since. I am curious what it says on the dyno with the new gearing and 520 conversion. I NEED MORE HP. I refuse to buy the Gxsr and the Cbr1000 doesn't impress me enough to buy it over my 929.

 

you're not going to gain HP from a gearing change

 

I know it wouldn't change the HP at the crank obviously, but since the ratio to the rear wheel was changed wouldn't thatfree upmore powerat the rear wheel thus why the bike is faster with the gear change and 520 chain (weight loss).Kind of like changing the clutching ina sled, i can gain hp on theTRACKdyno with a gear or clutch change without changingthe hp at the crank.I may be wrong but i think the new dyno numbers (at the wheel)will be a bit higher.

 

There might possibly be a slight increase due to decreased drag/lighter weight of the rotating assembly, which would just reduce the amount of parasitic loss (no gain in crank HP, but more of makes it to the wheel). However I think you're a little confused on why you feel more power when gearing down. No more HP is making it to the wheels, the only thing that has changed is the ratio of engine RPM to wheel speed. It can still make you faster in a given situation without making more HP. Make sense?

 

Yep

 

you're spot-on that there isn't an increase in engine HP, or even rear-wheel HP for that matter.. what a gearing change DOES affect is thrust. thrust is a product of power and the gear ratio, so a change in gearing can result in greater acceleration without needing more HP. i believe some magazines say that (on average) the increased acceleration from going up 2 teeth on the rear sprocket is the equivalent of 10 HP increase without a gearing change. of course that doesn't apply to every bike in every situation, but it gives you a general idea of how a gearing change can increase acceleration.