<div style="margin: 0in 0in 0pt"><span style="font-size: 10pt">Hello all
I have seen most engines use 3 rings on the piston while most of the model 4 cycle engines such as Saito and OS use only one piston ring.</span></div><div style="margin: 0in 0in 0pt"><span style="font-size: 10pt">What is the main purpose of using a single ring on these engines? Also what is advantage and disadvantage of multiple ring vs single ring</span></div><div style="margin: 0in 0in 0pt"></div><div style="margin: 0in 0in 0pt"></div><div style="margin: 0in 0in 0pt"><span style="font-size: 10pt">Thanks</span></div><div style="margin: 0in 0in 0pt"><span style="font-size: 10pt">Borna</span></div>