I've got a low mileage Honda 300 that is now 19 years old and runs like a sewing machine. Last year at hunting camp, someone had a Honda that was running rough and they switched spark plugs with mine. I forgot it until this year when mine would not run with the choke off. Went to NAPA and got a spray can of carb cleaner and a new plug. Tried the plug first. BINGO! Nothing else to do. The carb has never been off in 19 years and it's still perfect. I use Sea Foam in my fuel tank.
Wouldn't it be great to buy a car that gave this kind of service after sitting idle in a shed for 10 months per year.