I have a Loncin 125cc clone engine. It is a horizontal four-stroke with gearbox. I'm needing to fab or otherwise obtain an exhaust system for my conventional, old school minibike. The exhaust manifold studs are 45mm center-to-center. The port is 33mm in diameter. For whatever its worth, this engine has the exact same engine mounting holes as a Lufan (maybe the exhaust is similar). Can anyone please recommend off the shelf parts or comments about making ones own connection fitting?