You have subscribed to the correct area, you will find most of the information for power-torque engines (even early ones) relevant to your machine.
I will have a look through and add anything that is absent relating to the VSX 160.
The VSX 160 is pretty much a standard power-torque, with some minor adjustments for the eco-torque era, and a modified intake,
Instead of the usual intake elbow, you should have a straight intake and a large air hose.
I would suggest servicing the carburetor, as per the instructions in the G4 carburetors guide, although your carburetor is an updated LM, you should find this guide fine for the process.
Really it is just a matter of dissembling and cleaning the parts of the carby in fuel, then checking the seat, float, etc. where parts differ from the G4 carby manual, just continue on with the parts you have, and if any seem suspect to you, let us know, and pop up a picture if you are unsure.
The cutout wiring when you are finished is a little tricky, however you will find
THIS GUIDE should give you the help you need.
If you are still having issues once that is done, I would look into the decompression valve, if you need to do this, let us know, and we will guide you through.
