The fun part: Last weekend I picked up an unknown year (help!) PCR Jaguar 125 shifter (30/30, 40mm axle, CIK 05) with a 1986 Yamaha YZ125S engine and some other fun parts. The chassis is in rough shape as someone cut out the right seat brace and painted it in Hammerite some years ago, but both of these will be corrected as well as all of the subsystems getting a refresh or replacement. I am looking for any and all help identifying the chassis and it’s specs!
As far as I know, the rotary engines karts don’t actually compete with others so much. My basic suggestion would be to persue this project in order to develop your product and learb about our great sport while doing it.
As for the chassis. I have been dealing directly with the PCR factory since 2000 and can help you a bit. You will find that almost everything for that kart is no longer available. The Jaguar was likely produced around 1997. Brake pads are not available and would need to be re-lined locally if you can find that service.
I may have steering columns and spindles here and there.