‘79 Kz650B - Semi-Trackbike Build

[Streetfighterkz]

Set about fabbing a fender eliminator and taillight/plate bracket. I don’t mind the eliminator so much, but I spent a good amount of time on the bracket and not sure I like it.

Later, Doug

 

[doc_rot]

get a gas lens if you aren't using one. use as little electrode stick out as possible, get you tungsten sharp and keep it as close to the puddle as possible. practice, stainless is hard.

I was using a #7 cup and #10-15 cfh. (It’s hard to tell as it’s low on the scale). I ran 63amps as I heard 1A per .001”. However, I think some people use less amps for SS due to the HAZ. I did not back-purge although I did buy a dual flow meter to do so. I will use it when I really weld it.

Any other tips?

Later, Doug

 

[sandmanred]

I was using a #7 cup and #10-15 cfh. (It’s hard to tell as it’s low on the scale). I ran 63amps as I heard 1A per .001”. However, I think some people use less amps for SS due to the HAZ. I did not back-purge although I did buy a dual flow meter to do so. I will use it when I really weld it.

Any other tips?

Later, Doug

Be fussy about fit up, no gap is ideal. You should be able to go autogenous (no filler) if fit up is good. Does your welder have pulse? If so it's a big benefit, 30-30-30 is a good place to start, 30% background, 30% at full power and 30 hertz. I think back purge is essential for the weld. Tacking you can get by without.

 

[Streetfighterkz]

I did my best to have ZERO gap and I think I did really well on the two joints. No light showing through and I couldn’t “rock” the tubes to each other. I’m pretty sure I have pulse but I’ll double check. I will definitely back-purge for real welding.

I did stop by the metal shop and picked up 2lbs of 18ga (I think) SS metal coupons and another couple pounds of 16ga mild steel coupons.

Later, Doug

 

[Streetfighterkz]

I've been working on a rear caliper bracket for quite some time now. Finally got a design I liked and a coworker offered to 3D print a prototype for me. Other than having to shorten the wheel side spacer and turn up a spacer for the swingarm side, it will work as is.

Later, Doug

 

[doc_rot]

simple and clean. nice.