250-500cc 360, top end, when?

No stress ive got a manual just as mentioned seized it on wossners spec in a cast liner, i have no way to tell if it was done too wossners spec as i didnt measure it after it was done.
Cheers justinendo.

I know that 162 psi is plenty enough and that your larger cc takes less of a battering than my little 125, but I reckon I had 180 odd hours on a vertex piston and ring before I put a mitaka cast in there, didn't hone the barrel just scotchbrite padded and soapy watered it, sprayed the powervalves with wd40 type stuff and put it back together. Your low hours and bigger size means it's probably good to go for ages yet, since you're more about low down power than top end scream. I'd check the circlips are still in the right position, clean it all up and just keep running it, probably at 32 to 1 mixture max and 40 to 1 minimum

Thx gaz... It seems so. I'm just so impressed with this bike and how it's held up, to put out that much compression still. Very cool. I've been running it 50:1 on Amsoil Interceptor, but have since increased the mix to 44:1. If I was running a mineral based or blend, I'd run 32-40:1 like ya' mentioned, but with likes of the Amsoil product or any other super proven and solid full syn mix, 44:1 should still be in the sweet spot. Plus, as I've been told and understand, gas is what gives the cooling effect...so gotta have both oil and gas, since not enough gas ratio can also cause issues from the other end of the spectrum...

thats nothin, my 88 250 has a stone stock top end, still has 215 psi of compression. ive been running the bike since the late 90s when i bought it as NOS. it has to have over 200 hours, lol.

Hot diggity, thats what I'm talking about! Guessing you bought the gear as NOS along with the bike . Good stuff right there man!

Dude, seriously....that's crazy huh! And I thought mine wasn't half bad!