Oh, fellow Bullers.... regarding fitting and mixing of products. I had some issues regarding my clutch (plates etc). At one time a mechanic set my clutch to tight (far too little play) so the discs and plates burnt out. No funny business or pleasant surprise when riding the motorway
I bought the extra clutch plate kit instead of the HD/Buell original clutch kit.
This kit does NOT work with Müller. Müller make effort easier and also make the clutch ramping mechanism move further, giving softer hand pull.
This steals some space (movabilty) from the discs and friction plates, ok with original set up. No worries!
But with the extra clutch plate kit, this space is needed not to have the plates and discs come too close. So the original 2004 mechanism is now back. Extra clutch plate kit withstands more bruising (ceramic coated discs) and also have an extra plate (8 plates) see the name of the kit) compaired to the original clutch kit.
Regarding the tranny, i heard the 06+ (tranny) had another cut of the gears making gearing easier when gearing (compaired to 03-05). There are rearset kits avaible (aftermarket versions) giving a very exact and smooth gearing. I have one and that piece is one of the best upgrades i ever done to my XB. It gives really smooth gearing and i just move the foot 50% as much as with original to change gear.
It has a really cool mechanical look. I got a pic or two of it.. check my photos..