I was wondering if anyone has tried any engines from Zenoah or Chung Yang .They are sold at Davesmotors.com .They have a 28.9 cc engine rated at 3.5 horse power .My Tecumseh is 2.0 H.P. at 8,000 R.P.M and 49cc.I know the motors on this site are smaller cc wise but the H.P. and R.P.M. ratings are alot higher.These are used on Gopeds.The clutch dia is 55mm which is the size of my engine ,so it should bolt right on .I just need to hook up a fuel tank.Any feed back on these engines?.Thanks!.I am looking at a Chung Yang Cy29Rc 28.9cc 3.5 H.P. .