+1Every 500 mi. I clean with kerosene and lube with a chain wax.
Use kerosene for cleaning your chain as instructed in the shop manual,. Just to note W-D 40 removes grease which isnt good for our type of chains used on the Busa.
You can purchase a metal oil can spray bottle and gallon of kerosene cheapy at Lowes
Dude not trying to be offensive but do you ever RIDE that thing? I mean the busa is notorious for stretching chains. If you are throwing some torque on it I don't see how you are pushing 20,000 miles on a stock chain. I only got not even 6,000 out of my factory chain and I kept it lubed as a mo fo and adjusted regularMY BIKE HAS 18,300 STOCK CHAIN AND SPROCKETS. THEY ARE DUE TO BE REPLACED
The stealer told me not to use WD-40 as it would eat away the O-rings, X-rings on the links. So I use diesel and lube every Saturday wich equals 500 miles.I use WD-40 every other week and Chain Wax on the others . The Wd-40 keeps it clean