K&n filter in great condition just cleaned and oiled, box had 5 mini switches set in different ways changed settings , or so the information said off internet, it was set to 100% , TBH it's made no change with it off , only on start up I seem to now have choke as the revs are a bit higher on cold start , power wise no change
Don't back fire as much as well on run down ,
Cheers for your reply