From “Tech Talk” Suzuki RM125X (1981) Swingarm alloy type - for welding

[skypig]

I’ll try the Suzuki forum

The swingarm has a crack through an existing weld.
Anyone know what the alloy is? (6061?) or the likely “series”. (6000?)
Or what sort of filler rod I should use with my TIG.

Also any clues as to the best replacement bearings, top and bottom of the vertical swingarm mounted “Full Floater” linkages.

Thanks for any clues.

[Momus]

I’ll try the Suzuki forum

The swingarm has a crack through an existing weld.
Anyone know what the alloy is? (6061?) or the likely “series”. (6000?)
Or what sort of filler rod I should use with my TIG.

Also any clues as to the best replacement bearings, top and bottom of the vertical swingarm mounted “Full Floater” linkages.

Thanks for any clues.

5356 for wrought 6061 material. 4043 for cast to cast or cast to wrought.

Pretty sure those bearings are a nigger size and need to be genuine.

[skypig]

Thanks!!

I remember in 1981 the bearings in one end were $20 each. (My wage was $90/week as an apprentice, and the bike cost $1500)
I think they are now $100+ each, if you can find them.

[LWC82PE]

I found this info -  The Japanese developed the 7005 series aluminum for swingarms so they wouldn't have to heat treat after welding, Filer rod  possibly 4043 but research to be sure.

[skypig]

I found this info -  The Japanese developed the 7005 series aluminum for swingarms so they wouldn't have to heat treat after welding, Filer rod  possibly 4043 but research to be sure.

Good info. Thanks.