There,s 16000 odd kms on it hopefully. If i drill the lid and its still not right what do you think of trying the 122.5 mains. Dont know if im imagining it or not but when it starts to stumble up the revs it seems if i roll off slightly then accelerate again it seems a bit clearer. On the over run it sometimes feels like its hunting if you know what i mean. Dont remember when looking over the pipes that they looked particulary coked up.