Frame weight?

[Uzi9mm]

How much does the KX500 steel frame weigh?  How much does the KX500AF frame weigh?  Just curious how much of a savings there is.  Also, is there a signifcant difference between the frame weight of a steel frame CR250 vs an aluminum frame CR250.  It doesn't have to be CR250s, it could be any bike.  Just trying to see if there is a common weight savings across the board. 

Since I read this article about steel vs alum frames.

http://twostrokemotocross.com/2009/12/2004-maico-500-long-term-test-report-%e2%80%93-part-2/

[RM_Rider14]

Weight difference is a few pounds (at most) on a complete bike for Steal vs. Aluminum of the same size motor etc.  My '06 YZ250 was 216 pounds, and the K5 is 220.462 lbs.

  As far as I'm concerned the benefit of going with Aluminum is geometry.

[Hillclimb#42]

I am sure there is 10 pounds more on the k5 motor, than 250 motor, right?

[RM_Rider14]

I am sure there is 10 pounds more on the k5 motor, than 250 motor, right?

  You'd think so, but the numbers I posted are from both the YZ250 & the KX500 manuals.  That's comes to just under a 4 1/2 pound difference, even with my bad math

[jfabmotorsports.com]

There is a big difference in the aluminum vs. the steel frame weight. The steel K5 frame weighs 19 lbs 7 ozs and the KX450f frame weighs 24 lbs 11 ozs. I weighed them with the same scale 30 seconds apart. There is no typo or mistake, the steel frame is lighter. The KX500AF is 5 lbs lighter than the KX450f. My AF frames are about 1 lbs lighter than the KX450F and probably most other KX500AF's. There you are and there you have it.

JFAB

[allan1353]

interesting results..
 Would of thought it would be the other way but, after reading that link it's makes sense now.

wounder if that's why the kx and the cr stayed with the steel frames and didn't jump  to aluminum frames in the later years..

[Motorrad]

Speeking of Honda being late to the party.  Anyone else remember Jeremy mcgrath's very vocal dislike of al frames.

[Uzi9mm]

In other words, a steel frame with current geometry would be superior to an aluminum frame.  You guys agree with that?

[Dutch-K5 Fan]

YEP!!!!!

Not only for weight, also alot better acces on the carb and so.
Vertimati made a steel swingarm that was llighter than alu.
So wy do they use alu. Marketing if you ask me!!!!!!!


Dutch


Ps. Although I have a AF

[Motorrad]

In other words, a steel frame with current geometry would be superior to an aluminum frame.  You guys agree with that?

depends.  I think modern geometry has entirely too much influance from motocross/supercross tracks.   I like the old geomety better for open desert. 

[jfabmotorsports.com]

In other words, a steel frame with current geometry would be superior to an aluminum frame.  You guys agree with that?

    I like the old geomety better for open desert. 

Maybe a KX450SF (steel frame) would be in order.