The Excel tubeless thing is a bodge,there are only 3 manafacturers out there that do tubless,BMW there's is patented,Aprillia because the pay BMW,and KTM on their 690SMC from 2010 on.

This was posted a while back,and I'm between the devil and the deep blue sea as they say,keep the XT do a few more mods,ie weight saving mods and live happly ever after with bullet proof Yam motor,or buy either a 690SMC or an R,and the answer?? don't know.