DS Power to Weight thread

[Johnny Monsoon]

This is mostly academic in the sense that I'm using dry weight, and hp at the flywheel (the two least corruptable measurements).  While it won't give you a performance chart, it will give you a starting point as to what you can expect for power of a bike.  My measurements are generally from manufacturer websites and exhaust tuning sites (before and after power curves) where the flywheel bhp was not listed.

   Dual Sport                     
   Bike      Weight      HP      P:W   
                        
   DR200      249      13      19.15   
   XT225      238      15      15.87   
   KLX250S      262      18      14.56   
   DRz400      291      32      9.09   
   XT600E      344      45      7.64   
   TE-610      308      48      6.42   
   LC4 640E      325      55      5.91   
   XR650L      324      31      10.45   
   KLR650      402      35      11.49   
   DR650      332      43      7.72   
   CCM      332      43      7.72   
   F650GS      423      37      11.43   
   HP2      433      95      4.56   

[speedjunkie]

This is mostly academic in the sense that I'm using dry weight, and hp at the flywheel (the two least corruptable measurements).  While it won't give you a performance chart, it will give you a starting point as to what you can expect for power of a bike.  My measurements are generally from manufacturer websites and exhaust tuning sites (before and after power curves) where the flywheel bhp was not listed.

   Bike      Weight      HP      P:W   
                        
   DR200      249      13      19.15   
   XT225      238      15      15.87   
   KLX250S      262      18      14.56   
   DRz400      291      32      9.09   
   XT600E      344      45      7.64   
   KLX650C      337      39      8.64   
   KLR650      337      34      9.91   
   DR650      324      43      7.53   
   F650GS      387      42      9.21   
   TE-610      308      48      6.42   
   LC4 640E      329      55      5.98   

Fixed it for you, so as to add some color.    I was gonna add the Aprillia RXV series, but it appears they missed the boat on street legal this year.



Mike

[Johnny Monsoon]

Hey!  Thanks, Mike!  For any subsequent posts of numbers, either PM me or post them directly in here and I'll update the chart so there aren't many, many charts in one thread.

Aside from posting a photo link, does anyone know how to put a formatted chart in here?  

[bizarro]

Perhaps as an attachment? Or you could maybe save it as a jpg and upload it somewhere and link it in?

[Johnny Monsoon]

Perhaps as an attachment? Or you could maybe save it as a jpg and upload it somewhere and link it in?

Yeah, that's the easy way, but that winds up being a lot of work every time I want to modify it.  I'm sure there's a html geek that can show me how to format this...

[Nimh]

This is likely a stupid question, but what about the XR650L?  Too dirt bike-ish?  When I bought my KLR years ago, it was second in line...

All this talk of the TE-610 has gotten me thinking about a dual sport again.  I don't see too many for sale in our area.  

[Johnny Monsoon]

This is likely a stupid question, but what about the XR650L?  Too dirt bike-ish?  When I bought my KLR years ago, it was second in line...

All this talk of the TE-610 has gotten me thinking about a dual sport again.  I don't see too many for sale in our area.  

Not stupid at all!  This list is not nearly as comprehensive as I'd like it to be, but I've found getting good power numbers and weights from online sources of DS bikes is a bit spotty.  If you have that information I'd love to put it up on this chart.

[JohnWayne]

Well, I was going to post the barely street legal EXC450 (250.3 lbs) and EXC525 (250.8 lbs) numbers, but I can't find any hp figures.  Anyone have them?

[Johnny Monsoon]

Well, I was going to post the barely street legal EXC450 (250.3 lbs) and EXC525 (250.8 lbs) numbers, but I can't find any hp figures.  Anyone have them?

I'd like to see those as well; those are very cool bikes so long as you don't have much in the way of trail to connect.

[photomd]

How about dirt only bikes?

CR250's are about 45 HP and weigh about 215lbs dry...I'd guess 230 with fluids
CRf450's are about 48 hp and weight about 220 dry.

[Johnny Monsoon]

How about dirt only bikes?

CR250's are about 45 HP and weigh about 215lbs dry...I'd guess 230 with fluids
CRf450's are about 48 hp and weight about 220 dry.

I'd rather keep those in a separate chart, and further break those down between real engines and 2-smokers.   Just kidding, but I would separate them just to avoid confusion.

[photomd]

I'd rather keep those in a separate chart, and further break those down between real engines and 2-smokers.   Just kidding, but I would separate them just to avoid confusion.

Oh...OK. I just thought you'd like to see what a REAL dirtbike looks like on paper.

[JohnWayne]

I'd like to see those as well; those are very cool bikes so long as you don't have much in the way of trail to connect.

In the same vein, the barely street legal Husky weights (no hp figures listed) are:
TE250  238.1 lbs.
TE450  249.8 lbs.
TE510  250.9 lbs.

[bluepoof]

Woohoo, go XT225!  

[speedjunkie]

Here's a link that has a BUNCH of stuff on it.  Don't know if everything is completely accurate.  Looks like only up to 2004 also.  On a side note, it says a 2004 XRL is good for 61.2 hp and weights only 269 pounds!!  Surely not!!  That's nearly as light as the new EXC's!  That P/W ratio would be 4.4!!!    



Mike

[Johnny Monsoon]

Here's a link that has a BUNCH of stuff on it.  Don't know if everything is completely accurate.  Looks like only up to 2004 also.  On a side note, it says a 2004 XRL is good for 61.2 hp and weights only 269 pounds!!  Surely not!!  That's nearly as light as the new EXC's!  That P/W ratio would be 4.4!!!    



Mike

Yeahhh.... I've found it is very difficult to find accurate information when it comes to dirtbike and DS machines.  I'm not buying those numbers...

[speedjunkie]

Per Honda's site, the XRL weights in at 324 pounds.  No hp #'s, although I would guess it to be low to mid 40's, similar to the DR.  I don't know about the current line of EXC's but I've read mid 40's for the 400, 50 for the 450, and around 55 for the 525.  



Mike

[Cricket]

The horse power on the 06 KTM 450 EXC was 42 HP and Torque was 37.5 lb-ft by Motorcycle-USA  and the weight 255 # and here is a link to that article.
http://www.motorcycle-usa.com/Article_Page.aspx?ArticleID=3319&Page=5

The 07 KTM 450 EXC lost 3 HP due to the quieter exhaust and picked 6 # of weight. Here is a link to that article.
http://www.motorcycle-usa.com/Article_Page.aspx?ArticleID=4010

Ken

[leeo45]

Aprilia RXV 450       283      56      5.1
         RXV 550       283      64      4.4

And some people claim the 550 is closer to 70 HP !

[Nimh]

Not stupid at all!  This list is not nearly as comprehensive as I'd like it to be, but I've found getting good power numbers and weights from online sources of DS bikes is a bit spotty.  If you have that information I'd love to put it up on this chart.

Yeah - I'm impressed these numbers are as elusive as they are for the Honda... I can't seem to find recent HP figures, but I did find a comparison of the 2003 BMW F650GS and the 2003 Honda XR650L and it claims the XRL puts out 31HP peak on the dyno (which doesn't match your other data - at the crank).  I also found a few articles that claimed the XR650R puts out 43 hp at the crank, but I don't have a foggy idea if the two power plants are identical.  

And as other posters have already found, 324 lbs dry per Honda - P:W = 7.53   It sounds about right, but may not be dead nuts on...