What kinda alum for swinger?

[MTS]

what kind of aluminum (grade) did they use for old swing-arms i thought it was 6061 air craft or something? anyone know for sure?

Thanks :beer

[Jason Hall]

Are You Welding It? If You Are I Used 4140 or 4340 One Of Those 2, To Weld An 89 trx Swing Arm. I Can Find Out For Sure Tomoro When I Get To Work & Look At The Wire In Our Spool Gun.

[MTS]

that would be great!....

[Jason Hall]

I used 4043 when I welded my 250r swing arm.