The Metzlers that came standard on my '10 are junk, junk, junk (Roadtech Z6 I think but I'm not sure). The front tire had a groove on center that undulated left & right. It looked cool but it produced handlebar wobble up until 35mph. The bike / handlebars were following the tread pattern, a major, major design flaw. The front tire pushed a tad when hard over & they lasted 4-5,000mi (no, tire pressure was NOT the issue, I followed the recommendation exactly & checked PSI before every ride). Oh, and by the way, they would lose 2-3psi in 3-4 days time. Then I bought Michelin PR3's & it transformed the bike. If you don't feel like spending the bucks for Pilot Roads, the Bridgestones on my '14ES are pretty decent, far superior to those awful Metzlers but not as good as PR3's.
Metzlers do not do an FJR justice, avoid buying them, there are too many other better choices. Not that I have a strong opinion on them or anything.