how much horsepower?


25 replies to this topic
  • EXracer14

Posted July 27, 2006 - 04:27 PM

#1

how much horse power does a xr650 have... are they as fast as a crf450x.. are they good trail bikes

  • snaggleXR650

Posted July 27, 2006 - 06:28 PM

#2

XR650R uncorked ~45HP
XR650L uncorked ~36HP
CRF450X uncorked~45HP

The difference is in the power curve. The XR's make ALOT more torque and HP on the low end and max out on revs at around 8000RPM, peak HP on an XR is made at around 5-6000RPM.

The CRF's make much less torque on the bottom, and run much higher RPM's. Peak HP on a CRF is made well beyond 6000RPM, I would *guess* in the 8-10k RPM range.

  • wr450fyamaha

Posted July 27, 2006 - 08:19 PM

#3

yeah, it doesnt really matter what peak hp is....i mean it is important but if you get 40hp from 3K to 6K rpm's, thats way better than 30hp from 3K-5K and 45 from 5K-6K

  • snaggleXR650

Posted July 28, 2006 - 03:19 AM

#4

WR450Fyamaha, nailed it precisely...

  • HappyCurmudgeon

Posted July 28, 2006 - 03:45 AM

#5

WR450Fyamaha, nailed it precisely...


mark your calander!

  • snaggleXR650

Posted July 28, 2006 - 04:55 AM

#6

Oh yeah, WR450 is the guy everybody picks on isn't that right? So, what is a guy with a Yamaha name doing in the Honda forums anyway?

  • Motosprtman

Posted July 28, 2006 - 04:59 AM

#7

they all make more power than the average rider will ever need.

  • pburke

Posted July 28, 2006 - 06:30 AM

#8

like Rools-Royce sez about engine output: "Sufficient"

  • brichter

Posted July 28, 2006 - 09:08 AM

#9

they all make more power than the average rider will ever need.


Unless you're fat like me! :thumbsup:

  • SniperTeamBravo

Posted July 28, 2006 - 11:57 AM

#10

Theyre all suffecient till youve owned them for a few months...then they need more, and more, and more....at least I do.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • captb

Posted July 28, 2006 - 01:52 PM

#11

Oh yeah, WR450 is the guy everybody picks on isn't that right? So, what is a guy with a Yamaha name doing in the Honda forums anyway?


:thumbsup: Yamahas are recycled Hondas so he's ok here.

  • BigRichard

Posted July 28, 2006 - 02:12 PM

#12

XR650R uncorked ~45HP
XR650L uncorked ~36HP
CRF450X uncorked~45HP

The difference is in the power curve. The XR's make ALOT more torque and HP on the low end and max out on revs at around 8000RPM, peak HP on an XR is made at around 5-6000RPM.

The CRF's make much less torque on the bottom, and run much higher RPM's. Peak HP on a CRF is made well beyond 6000RPM, I would *guess* in the 8-10k RPM range.

Out of all the magazine articles I've read, I've never seen the 650R rated below 50HP. The highest I remember was 56HP uncorked.

I wish I wouldn't have sold my '01; it had freakish top speed.

  • The_Edge

Posted July 28, 2006 - 02:17 PM

#13

how much horse power does a xr650 have... are they as fast as a crf450x.. are they good trail bikes


Thats a good question! I have wondered that myself because I am currently trying to figure out what to get, an XR650R or CRF450X. I am not sure of why to pick one over the other. I know XR's are reliable and I know that the 450X's have had trouble with burning oil and tranny problems but the different type of power they have over the XR maybe worth it. I dunno! I am hoping to read other opnions on why to choose one bike over the other.:thumbsup:

  • snaggleXR650

Posted July 28, 2006 - 05:23 PM

#14

The CRF is definitely a more race oriented machine, that can be ridden on an MX track without killing yourself. Great power, excellent handling/suspension, light and thin and E-start. Downsides are maintenance and reliability as with any race tuned motor.

The XR's are more play bikes. Heavier, wider, not as nimble. However, they are virtually indestructable and will almost run forever. They also make great dual sports as they can be geared up and have no problem on the street, even long trips.

They are two totally different bikes.

As for HP on the XR650R, those high HP #'s are at the crank, not the rear wheel. A 680cc big bore, with lumpy cam, oversized valves, full exaust and tuned aftermarket carb barely make ~58HP. Stock uncorked bikes are ~45HP, maybe up to ~48 AT THE REAR WHEEL.

  • Wheels up

Posted July 30, 2006 - 04:37 PM

#15

The XR's are good trail bikes and they make good power.

  • The Spanky

Posted July 30, 2006 - 04:42 PM

#16

XR650R uncorked ~45HP
XR650L uncorked ~36HP
CRF450X uncorked~45HP

The difference is in the power curve. The XR's make ALOT more torque and HP on the low end and max out on revs at around 8000RPM, peak HP on an XR is made at around 5-6000RPM.

The CRF's make much less torque on the bottom, and run much higher RPM's. Peak HP on a CRF is made well beyond 6000RPM, I would *guess* in the 8-10k RPM range.

That does leave one important part out of the equation, though: weight. A CRF450X weighs in at around 260 pounds. The 650 is pushing 300 lbs. That's quite a handful to muscle around on tight trails, and the bike isn't very happy under those conditions. It likes big wide open spaces. For tighter riding, the CRF will serve you much better.

  • The_Edge

Posted July 30, 2006 - 05:40 PM

#17

That does leave one important part out of the equation, though: weight. A CRF450X weighs in at around 260 pounds. The 650 is pushing 300 lbs. That's quite a handful to muscle around on tight trails, and the bike isn't very happy under those conditions. It likes big wide open spaces. For tighter riding, the CRF will serve you much better.


Dry weight on my XR600 is 271, thats not much heavier than honda's advertised dry weight of it's other bikes.

  • snaggleXR650

Posted July 30, 2006 - 05:54 PM

#18

XR650R is 280 dry
XR650L is ~320 dry?

  • wr450fyamaha

Posted July 30, 2006 - 08:27 PM

#19

Oh yeah, WR450 is the guy everybody picks on isn't that right? So, what is a guy with a Yamaha name doing in the Honda forums anyway?



The name came way before the bike, the love, the passion. I am known by it and i will probably never change it.

  • SniperTeamBravo

Posted July 31, 2006 - 09:30 AM

#20

I would bet my XR600R is about 35 at the rear wheel up where I live which is at 7420ft above sea level. Man, somethimes I wish I still lived in Monterey Ca again! But if it werent for the damned politics of the Republik of Kalifornia.....Id still be there....some things never change!

Oh, and I saw a HRC Baja XR680 on a website they claim is 72 hp at the rear wheel. Now all you guys can go apeshit over that one! It does look real trick, but 72 rwhp? Yeah it is a 680, and Im sure cams, porting, ballanced, a trick carb...but 72 rwhp!





Related Content

 
x

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.