kinda curious as to why you hardly see the power ratings on dirtbikes? Im sure they are all similar per displacement ect but still kinda crazy why they wouldnt especially if yours is puttin out 5hp more than the next guys.........
The horsepower rating is on the certificate of origion isn't it? I kind of wonder why since it is there it isn't discussed more and exactly what method is used. My wr 250, 2004 model says 42 for the horsepower, I never got a plate so I still have the piece of paper. Is the horsepower missing on the latest models?
i didnt even think about that, ill have to check. but ya like everything else id be boasting the hp and torque ratings if you got the comp beat
Horse power ratings can be quite confusing. Are they measured at the crank, or rear wheel? Are they measured at sea level under optimum conditions, or at any location & then mathematically calculated for sea level?. Are numerous bikes tested on the same dyno under equal conditions? So many variables. Almost like bike weight I wish there was one standard worldwide, & only one standard for accurate numbers & comparisons.
I don't recall seeing it on my certificate of origin. It's road registered now, so they took the certificate.
seems to me that my 09 TE510 had it on the original paperwork too, before I took it for the title,tag and registration paperwork.I remember because in its' as delivered non powered up mode it was a pitiful number if I recall correctly.
If your old like m you remember the awesome tests of the old days, mutli day reports, Dyno graphs, actual weight on a scale and lots of interesting in depth info. Mags now are 100 pages of adds with some bike adds ("tests") scattered about.
I'd like to know the hp rating difference between the 2011 TE 449 and 511. That seems to be the only real difference between these two bikes. Not sure why it isn't published. I found a chat about the 449 on thumper talk that said it came in at 51 hp but I can't confirm this on any Husky sites. Any ideas on where to look or what the hp difference may be? It isn't going to make or break my decision on which bike to buy, I just want to know if the $300 price difference is getting me any extra jam or just toast...
In Germany (and within the EU), hp is a thing of the past. Replaced by something loosely translated as: "Stated performance in KW/stated rpm at min 4" ... whatever all that means. Suppose there must be some method of translating it all back into hp?
kilowatts i think is the equivelent of the torque rating, but not positive on that. ya got me on the min 4" though
Thanks for that. I know hp is just an indicator of performance and maybe not the best one at that. I'm just trying to get a bit of an indication of the power difference between these two models as the shop here only has a 449 in stock at the moment so I can't ride the two different models and see for myself. I'll try searching kw instead of hp though and see what I can turn up. Thanks again.
Okay, so here is what I found on a kW search: 2011 TE 449 - 38/kW (no comment on rpm) 2011 TE 511 - 42/kW (no comment on rpm) 4 kW difference or approx. 10.5% more kWs with the 511. So there is some real extra bang for your buck with the 511 if you're into that. All other specs seem equal on the two bikes, even weight. For reference: 2011 KTM 530 exc - 41/Kw (no comment on rpm) stated to be equal to 56 hp 2011 KLX 450 - 41.5/kW (@ 8,000 rpm)(this seems like high rpms for a 450) Thanks for the help on this. Looking forward to getting a Husky!
Just because peak power is measured shouldnt be a reason to buy one over another. remember that power delivery is more important and how that power translates to rideability. As a note to that - my GSXR 750 isnt set for peak power (measured at track DynoJet dyno at 127), but it makes power all the way from 7500 - 14000rpm (from tuner on Factory Pro dyno).
They are close that is for sure. I found this great converter: http://www.unitconversion.org/power/kilowatts-to-horsepowers-conversion.html Some of the stats are rounded up and down.
In most cases I would agree - power delivery is key - but in this case, the only difference between the two bikes I'm considering is the bore size and the size of the piston. The stroke and all other specs are the same. I'm assuming that the power band and all other aspects of performance will be the same with slightly more power output on the 511 as compared to the 449. Is that an incorrect assumption? Can changing the piston for a larger one cause any negative changes in an engines performance? If anyone has bored out and added a bigger piston to a bike in the past, I'd be interested in hearing your thoughts on the impact it had on the performance of the bike and its rideability. Planepower, did you do make any internal changes to engine components when you set your 750 up?
Don't get caught up in racing dynos. I have seen guys set spark curves and fuel mixtures to get big HP numbers on a dyno and then take it to the track to find out that their set up won't pull your hat off in the low and midrange. Trust the seat of your pants when you ride the bike.
I added the Yosh Head gasket, and porting and valve seats grinding, Yosh Exhaust cam and sprockets. The tuner we use here has built engines for top level drag racers and for Canadian Superbike champion. He swears by his Factory Pro dyno and is a firm believer in tuning for driveablity vs just top end (which can be done with Power Commanders and Bazzaz systems. Il say that the engine feels like and electric motor. (better than when i just installed the PCIII)
