Check out the guy in the left hand corners bike.
I think it's actually a PK Ripper thats been downsized to fit a fast little guy.

You could fit JMC forks to a PK Ripper frame , bitd
No reason not to fit JMC mini forks to your
Ripper frame.
Back then you fit whatever forks you wanted
to your bike.
Back then SE didn't make mini Landing Gear forks
or was only just releasing LG forks in general for
sale.
~1981 Metro West , Sydney Australia.
Matt , Coasty & I are all in there somewhere too.
JB