Maintenance & Technical > KX500 Aluminum Frame Conversion (AFC)
my poor bike
sandblaster:
Just curious, did you stress relief the frame after weld and then heat treat?
I wondering how many actually do?
Does Service Honda?
motopunk:
after the new closer pics of the y, i have to say that the weldings still look good, but the quality of the frame-rails-aluminium seems to be to low. very thinn walls also.. :|
are the frame rails selfmade? or which one do you bought?
i love the look of the al-bikes, but there is so much to watch out in cutting and welding on it what it makes a little bit dificulter than a steel-frame-conversion. in theory aluminium needs 3x thicker walls than steel, to get the same durability which make an al-frame not as half as flexibel compared to a steelframe.
just found this frame , hope it helps to bring your bike back to live... :-)
http://www.ebay.de/itm/Kawasaki-kxf-250-kx-250-f-main-frame-A1004-/251273932896?pt=UK_Motorcycle_Parts_13&hash=item3a8117f060
Motorrad:
--- Quote from: don46 on June 04, 2013, 08:59:36 AM ---It looks like the left downtube showed signs of failing prior to the failure, the right side looks like a fresh failure. This would be another argument for Sandblasters front head stay, had you had one it may have prevented complete failure. Welds appear to have held. I do believe that the factories use the radius tubing to prevent failures like this. Seems like an old welder told me one time that you never weld square, always radius you pieces to prevent failure.
This was a 250 so, all with 500's better look close, really close.
--- End quote ---
I 100% agree with dons observations here.
Never weld square tube.. in applications like this. the corners are stress risers...
jBernard:
i know the hondas use some specialty extrusions. looks like square for half of it, then a chamfered edge on the outer side.
how are you supposed to radius square tubing though? just bevel the edges? to put any kind of radius on it youre taking a lot of material off and leaving the corners thin. seems like it would help the stress point, but in turn be an issue in itself.
cmotodad:
There is a radius 1in sq tube avaliable. The guys on banned buy it all the time. Same wall thickness as stock CRF and radius inside and out.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version