hi, I have just returned to biking and purchased a RR9 blade after many years of riding and racing GSXR’s. My blade has a standard air filter with a PC5 (std dynojet download map) and a Yoshimura can which looks to to a half pipe and can. The air filter is in reasonable condition but I wondered whether an after market would help it breath and if so would you all recommend as a manufacturer?
I think you'll find K & N highly recommended: https://www.knfilters.co.uk/search/...ar=2009&make=HONDA&model=CBR1000RR&engine=999
I can highly recommend mwr filters! Bit pricey but I definitely noticed a difference on the same even without mapping