125-200cc Service manual? What how to compression test?

2000 CR125.

So I tested the compression, I figure since it is a 2 stroke I should just kick it over as fast/hard as I could repetitively until the compression peaks right? Is this the correct procedure? I did it with the tank off but fuel still in the carb so fuel = oil so no need to oil the cylinder when checking?

I spoke to the previous owner he never did a top end but doing the method above it peaked at 180psi. Is this okay for a 125cc? It runs fantastically and rips like no other but seems like the plug is quite dark/rich. But it may have had too rich of premix or poor quality premix in it before.

At what psi should I think of replacing the rings/piston?

Also is there a service or workshop manual for a bike this old? I mainly interested in the parts on engine disassembly assembly and trouble shooting any electrical (for the future).

Thanks yall.

i have a wre125 i got 170 when tested mine if any help

I like to warm the bike up first . 170 and 180 are very very. good. Depends on the guage. . My new 125 was 150. The 144 about 160. And the 165 was 180

mine was done stone cold throtle wide open and i got 170 and thanks for the info coz i could not find out what it should be so mine must be all good compresion wise.and its got 9000miles on it and not had a piston change from new am the first owner