weight loss/power weight ratio
#11
metmachex quality is excellent about 20 lbs weight loss
http://www.metmachex.net/p0_0_0.htm
http://www.metmachex.net/p0_0_0.htm
#12
Rule of thumb in cars was 100lbs=.10 Now thats on a 3,000-3,500lb car! I agree, you may not FEEL it, but take it to the strip and you will see it in the time slips. He may not feel it now, but he is on the right track with his theroy....A few more weight saving areas and it will be a nice improvement. Look into lighter wheels, that would be the most important area to loose weight.
I know weight disadvantages all too well. I have a buddy who's bike makes less power, but I get beat every time.....He weighs less.
Last edited by redrubicon2004; 02-26-2011 at 10:26 PM.
#13
A 650 lb bike with a 200 lb rider is of course 850 lbs. So 30 pounds is around 3.5%. Removing 30 pounds can't hurt, but is hardly worth the effort or cost for a torquey cruiser. Heck, I can't hardly tell the performance difference while driving my 7,500 lb Diesel pick-up when pulling a 1,200 lb car trailer with a 3,500 lb car on it vs driving with no load. There is a difference, there has to be, but I sure can't tell it when cruising down the highway, passing cars, etc.
If you've got a nice digital speedo with all the bells and whistles, do your own test. Run the 1/4 mile about 3 times and get your average. Now, add 30 pounds to the bike and do 3 more runs. How much did you lose by the added weight, all else being the same? How much money are you willing to spend to achieve those same results by lightening the bike with lightweight parts? Would you spend $1000 for 1/2 MPH?
Losing unsprung weight is great for motocross, Baja and the like, but you also need to adjust your compression and rebound damping to take advantage of the lighter unsuspended parts. On a cruiser, the unsprung weight isn't as big of an issue.
If you've got a nice digital speedo with all the bells and whistles, do your own test. Run the 1/4 mile about 3 times and get your average. Now, add 30 pounds to the bike and do 3 more runs. How much did you lose by the added weight, all else being the same? How much money are you willing to spend to achieve those same results by lightening the bike with lightweight parts? Would you spend $1000 for 1/2 MPH?
Losing unsprung weight is great for motocross, Baja and the like, but you also need to adjust your compression and rebound damping to take advantage of the lighter unsuspended parts. On a cruiser, the unsprung weight isn't as big of an issue.
Last edited by HemiOrange; 02-27-2011 at 12:30 AM.
#15
Less weight is generally a good thing; I haven't read too many articles on "How to imrpove your bikes handling by filling the frame with lead and drinking more beer"...my own FXDXT is 607lbs on a commercial shipping scale (NOT a roadside truck scale) with 1/2 tank of gas...the handling difference is very noticable; performance is provided by a 103" motor. I've got an aluminum swingarm, aluminum rims and composite rotors...how much that all took off or in what proportions I can't say 'cause it was a complete build; all at once.
#18
#20
That ratio works out to be about a 3% weight drop. That means to get the same benefit from a 650lb bike you'd need to drop about 20lbs.
You won't feel it on the street unless you drop about 100 lbs of weight.
For a cruiser (cruiser being the operative word here) I'm just not seeing the fascination with weight reduction unless you go to the track with it.