After ..over 75 new bikes and scooters....and then they do not do all they say they do----to be quite frank, most is not necessary anyway.
Ride'em----I trade at 50,000 miles, let somebody else. worry.I do own oil changes, etc---air filters in normal street use last 30,000 miles,I have gotton 50,000 miles out of original plugs---lots of fresh oil---,WalMart 10-40 in US---good price, over 500,000 miles no engine failure/both air and water cooled