Service Items (Air Filter / Plugs / Oil) - recommendations?

[darrsi]

[quote author=fazersharp link=topic=23429.msg270342#msg270342 date=1508838908]
You should not be needing to change the disks unless there is something wrong with them
Semmi synth for me Castrol
NGK plugs
Standard genuine yam air filter, my argument against K&N is that I had a 14 year old filter that i replaced with a new OEM one and did not notice any difference. So if a dirty old one to new one gives no difference I don't see how a K&N one would make a difference.
Old and new picture here

I noticed the difference when going passed 7k revs on a dirty air filter.
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I bought a HiFlo air filter years ago which lasted about 3 days before i ordered a K&N.
Most likely it was a ropey one, but the bike just didn't breathe at all.
Once the new one was fitted the difference was huge.
I also did a carb balance though with a 'dirty' K&N and i had to do it again a week later after cleaning it.
So a stuffed up air filter really can alter a bikes performance, and as you say at the top end it will undoubtedly make a difference.