What to use on spark plug threads before tightening down to head?

[sirhrmechanic]

Those will do very nicely. They seem to be copper (solid) rather than copper fiber. No worries. Pure copper crush washers are just ideal for air cooled engine.

Buy a bunch. Change every time you take plugs out.

Cheers,

Sirhr

[sunnybamrah]

Thanks a lot Sirhr ordered a whole bunch of them.

Regards,
Sunny.

[bselph]

Found them.

http://www.championsparkplugs.com/product.aspx?zpid=26421

[sunnybamrah]

Sirhr,

That is a sweet looking bike, post more pictures during the build.

Regards,
Sunny.

[Jascanio]

That is a beautiful bike!!

[bselph]

I have received a LARGE quantity of the washers. If you want some send me a private message with your mailing address and I will put some in an envelope and send them your way. No charge, I am paying it forward for all the help I have received here.