Hello,i am new here! I have asked this question in many forums like thumpertalk.I am thinking about getting YX160 or Z155HO.I dont know which one to choose.The engine goes in road/offroad bike with 17/41 gearing.The engine would be maintained properly with top ends and oils and valve clearances.Which one is betterer and why? This goes little off topic but would i need rim lock for 90/100-12" rear wheel.I run pressures between 25-35.Sorry for grammar errors,this isnt my native languange
