Maintenance & Technical > KX500 Steel Frame Conversion (SFC)
steel frame head mounts
motopunk:
only the brackets(plates between headstay and frame) are aluminium. the headstay itself is steel (painted it silver against rust).
Goat:
--- Quote from: motopunk on January 31, 2014, 06:48:22 AM ---only the brackets(plates between headstay and frame) are aluminium. the headstay itself is steel (painted it silver against rust).
--- End quote ---
I thought the whole thing was aluminum. Fooled us with the fancy paint job :P
Now you have me thinking I need to send my crank to someone. My 87 vibrates pretty bad. Only use my stand to work on the bike. If I start it I stay on it but I would guess it would vibrate off the stand.
I am in the same situation yeomans. No aluminum welding for me so everything gets made of steel. I always overbuild everything too, as in 1/4" plate instead of 1/8". Sometimes that does more damage though.
motopunk:
--- Quote from: Goat on January 31, 2014, 04:57:43 PM ---
--- Quote from: motopunk on January 31, 2014, 06:48:22 AM ---only the brackets(plates between headstay and frame) are aluminium. the headstay itself is steel (painted it silver against rust).
--- End quote ---
I thought the whole thing was aluminum. Fooled us with the fancy paint job :P
Now you have me thinking I need to send my crank to someone. My 87 vibrates pretty bad. Only use my stand to work on the bike. If I start it I stay on it but I would guess it would vibrate off the stand.
I am in the same situation yeomans. No aluminum welding for me so everything gets made of steel. I always overbuild everything too, as in 1/4" plate instead of 1/8". Sometimes that does more damage though.
--- End quote ---
:-D .. thought your eagle eyes had seen the material diference...
yeomans:
Vibration is my main concern, I've seen some nasty breaks at the head studs before in a friends go kart.
I am getting the crank rebuilt and balanced for the build, hoping this alleviates some vibration right at the source.
I had made a mock up mount out of steel, but I'm now wondering if aluminum might be the best material, I'm sure theres a reason the Japanese use it for the headstays.
It's funny you mention overbuilding, Starting to think about what extra welds the frame would benefit from before it goes to powder coat. :-D
motopunk:
"I'm now wondering if aluminum might be the best material, I'm sure theres a reason the Japanese use it for the headstays."
the same thoughts that i also had. reasons for aluminium-brackets are 1/3 less weight than steel and another arrangement of the atoms in the material, which helps to eliminate some of the vibrations on the direct way from motor to the frame.
and an important fact: a bad balanced crank makes the whole bike shaking like a rodeo-bull .
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