Hi all, today I decided to change my spark plugs on my 2005 cbr 1000 because I don't know when the last owner did it. I pulled them out and they were NGK iridiums, and I was putting in autolites regular ones because at the time I didn't want to spend a lot of money and they've been sitting for a few months. Anyway, I made sure the gap was good at around .035 and I installed everything. The bike runs but it runs like crap.
My question is, are these bikes suppose to only use iridium plugs? If not, the only other thing I can think of is the NGKs didn't have the metal washer on them and the autolites came with them so I used them. Could this be my problem?