http://www.advrider.com/forums/showthread.php?t=156429&page=665 Post 9965 38.5 HP at the rear wheel 24.7 ft/lb
Wow the poster says the bike is stock which means he has been riding around for 12000 miles with the stock exhaust (you can see it in the pic ) which has a highly restrictive cat exhaust !!!
My "SOTP" dyno indicates about about a seven HP gain when properly jetted and a good free flowing exhaust.
I wouldn't take those numbers to heart. I've spent some time running bikes on a dynojet and there are a few things that I can see from this picture that are making a big difference with crank vs. rear wheel numbers. BTW- I wouldn't be surprised if the 450 made more power than the 610.
True on the forast part. As for the 450 -v- the 610. I own a 06 TE610 with a Barrett muffler on it and a bone stock (motor wise) TXC450. The 610 has way more torque and bottom end and i would guess more power everywhere. The 450 might have an edge on top but i doubt it. I think my 610 would leave my 450 for dead in a pavement drag race. Might have to do that one day soon. I have no problem hanging with and leaving these two 650 twins...
Most of the "tests" that I have seen indicate that the 450 and 610 are pretty close when it comes to peak HP but the 610 delivers it over a much broader rpm range. Yeah Kelly I think you are right that in a asphalt drag race the 610 probably has the edge over the 450, like the old adage goes " there's no replacement for displacement".
Let me know if you need any "help" with that... I'll hold the camera while you and Shane race... Later,
I was always told by a local dyno guy that knobbies and dyno's do not work well together. I watched his 45o KTM gain 6+ hp over a knobby when he spooned on a street tire.
Yes, I agree. There's a knobby on there and they'll kill a run. I've also found gearing has a huge effect. 450 vs. 610, Just as stated above, I think the top end HP number would be close, but the 610 will make WAY more torque and HP over a much broader range. BTW- I think the 610's basic motor design is a great one and that's why it's still around. Husaburge and KTM basically used spin off designs to get into the 4 stroke market. It was the first truly competitive, light weight four stroke motor, IMO.
