Motorcycle Repair: 1983 yamaha seca 900, spark plug fouling, gasoline additives

Question
what would cause  spark plug fouling after only 2 or 3 hundred miles?

Answer
Hi Carl,

Q:  What would cause spark plug fouling after only 2 or 3 hundred miles?

A:  What kind of fouling? Visit NGK's website and compare your Seca's plugs to those displayed under "Plug Problems."

http://www.ngk.com/sparkplug411.asp

Possible causes of fouling:

Restricted air intake/dirty filter
Carburetors varnsihed
Carbs out of adjustment
Choke defective
Improper use of choke
Carb jets wrong size
Lugging the engine
Defective ignition
Gasoline additives
Worn spark plugs
Low compression
Other


Respectfully,
Mark Shively