Welcome to the forum!
What is wrong with your meter exactly, I might be able to repair it for you if it’s not too bad?
Can you post a brief description of what it’s doing and a few pictures with it powered up with your headlights turned on so it’s illuminated, if possible?
I will send my contact information to your message box as well if you’d like to look into a repair
-AKATV
Welcome aboard. Is it smoking? Have you tried upping the idle a bit with the knob on the bottom of the carb?
And check and make sure your stator is charging with the machine running. Use a multimeter and make sure you are charging. If not, you might have a bad regulator.
with it being 24 yrs old ?, its hard to narrow your issue down. the piston, or bore can be worn ?, the connecting rod can have play in it ?. wrist pin top at rod can be worn out ?, valves can be out of adjustment ?. really hard to tell you what it can be. the only way you will find out, is too tear the top end down, and inspect the piston, bore, valves, rings, connecting rod. BEFORE you tear it down !!. make sure to have a top end gasket kit, and a tube of yamabond or hondabond on hand !...DO NOT USE RTV SEALANT ANYWHERE ON THIS ENGINE !!!. i'll go out on a limb here, and say your piston, jug, connecting rod is worn out..one of these..or all 3 need to be fixed.