so I did oil/filter plugs..iridiums...and air filter the other wk....now when I roll off the throttle at speed and then roll it back on the bike stutters n holds back is the best way I can describe it......and if I try to hold a steady throttle in 5/6th it isn't smooth...I've lifted tank ..checked everything is seated right an it is. ....pipe off rear of the head is on the bit of the tap facing forwards and me Scott oiler works so that's correct.....doing me head in now. ...went to Cardiff last night on it and it was terrible on the motorway. .had to keep dropping down geara to get me speedup.....HELP!!