I have 3 xb's and a CR----think it's time to get back on a tuber. If I remember correctly some of the earlier ones had frame issues and I'm sure some years are more desirable..... FI, more HP, upgrades components etc. also any specific things to watch out for with the age of these bikes? I'm sure gaskets are a concern since I believe they were paper gaskets and these fine bikes now have some age on em