Don't even fit the Chinese rings Bob. You never quite know what you're getting with them. In fact I've even seen a fair compression increase of around 15psi just by fitting Cabers over the supplied Chinese rings on 372XP BB kits. I've also hand grenaded a number of piston tops from Chinese rings letting go in the exhaust port. Don't trust 'em
sounds a bit like this chinese stuff is not worth buying, why would a man who obviously knows his stuff bother with anything but genuine parts.
I would think that top that bob has pictured would be fine for weekend woodcutters like me.
I often see a guy at the pub who raced for years, he has retired i beleive and was checking the posts i think at camden last year, i'm going to ask him if he knows any racers blokes on here.
Still, best of luck with the chinese powered 090 sir, and would love to see a 090 win somewhere.
Question Bob
how would your imported hotsaw go against what gets raced in nsw now, i saw a hig husky last year cut the 3 cuts in something like 8 seconds and the wood looked bigger than 1 foot across.