Thanks Greybeard. I've been reading all info from previous posts. Very helpful. Its a TBA 2003 model, obviously a 865cc. Its been a long time since I have had Triumphs, the bikes I use to ride vibrated allot and were 650 and 750's. This is a nice machine, but a little sluggish. So if I understand your note, I will not realize much improvement removing air box and fiddling with the jets due to the cam timing, correct? What bolt on's are you referring to for 904CC? Thats really not much of a jump. Be waiting for a reply and thanks in advance.