Ante confuso

ok, for the moment I widened 2mm each side exhaust and I haven't got any problems.. in the future I read about GS 177 polini piston with very good rings (like the one of 210 GS I think) and when I will get some money to spend in my scooter, I will buy it, and maybe I will enlarge a little more the exhaust..eheheh

Do you know if it is possible,with good results, to improve the original ones? I don't know.. maybe very little rounding the edges of the ring? I blueprinted ports in cylinder, it's a good thing.

Marco

oh..

i meant the piston rings!

ggg

working on them can´t be any good

uhhh ok