Head model ID by stamped numbers

TFR Aussie · Dec 23, 2022

The 2 piece head has two matching numbers as I think that they are line bored as a pair.
We are trying to ID some heads and I guess you can tell what model heads come from by what numbers are stamped upon them.
Mainly trying to ID replacement 1972 heads for engine number s650 129 120.
Greg

650Skull · Dec 23, 2022

As long as the head and rocker cover have matching no's the head can swap over to any other engine. Early heads have some differences that cant be matched to later motor. XS1 and 1B's are the odd ones out i think

drgonzo · Dec 23, 2022

You can't put an XS1B head on a 447 engine?

TFR Aussie · Dec 23, 2022

650Skull said:
As long as the head and rocker cover have matching no's the head can swap over to any other engine. Early heads have some differences that cant be matched to later motor. XS1 and 1B's are the odd ones out i think

"Early heads have some differences that cant be matched to later motor. XS1 and 1B's are the odd ones out I think"
This is why I'm trying to find out if the stamped numbers on the heads relate to what model bike they come from.

650Skull · Dec 24, 2022

Head model ID by stamped numbers

TFR Aussie

XS650 Enthusiast

650Skull

Cockytoo

drgonzo

XS650 Addict

TFR Aussie

XS650 Enthusiast

650Skull

Cockytoo

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