Hyundai Gas Golf Cart Runs Rough

[jride1999]

I bought a Hyundai Gas Golf Cart and it runs rough. I dont no year sorry,has a 8.5 suzuki ohv motor,ran good first couple days,an now wants to spit an spuder when i take off.an i found a linkage thats not conected,it sits on top of rear pumkin an cant figure out were it goes.the end of muffler is missn an burnt hole threw back plastic,were can i get a new muffler?i heard yamaha g1-g9 will fit but will muffler also.sorry so many questions,but help whould b nice