Just a warning about Metzeler tyres.
I have always run Metzeler Tyres from the old fishbone pattern to Z4s - Z6s and Z8s have now come on the scene. Having done 140000 klms on my ST1100 and now 150000 klms on my ST 1300, usuall getting up to 9000 klms per set I have purchased over 30 sets of them...The last set they could not supply Z8s so they supplied a Z6 for the front and a Z8 for the rear saying that they would be compatible.
I instantly had a vibration through the bike just like a tight spot in a chain gives. Tyres back 0ff and re-balance, no gain, wheels off and new wheel bearings, no gain, still there. Tried contacting Metzeler but they just would not reply. After 1000 klms, (and heaps of mechanical cost) threw the tyres away, that was $500 down the drain and purchased a different brand, about the same price, the vibration gone and I have done 12000 klms and still have tread.
Will not be going back to Metzeler.
Rally Norm