Hello,

I got a 2017 Forty Eight. This strange shift issue just started happening recently. I will be riding perfectly shifting through gears, sometimes when I shift up from 3rd to 4th, the lever goes up but bike does not shift into 4th, I don't hear the clunk and the bike remains in 3rd gear. It doesn't happen in any other gear only when I shift from 3rd to 4th. What could be the issue?? The bike just had the 1000 mile service done 200 miles ago.