there is nothing wrong with it. Just change your oil to some fully synthetic, get you engine flushed before hand and then just adjust your clutch lever. there should be only be a 0.5 to 1.5 cm play.
After all that, your problem should be solved. I only gets my my engine flushed every 15k miles and till now i never faced any engine related problems. Just changed the chain and sprockets but after clocking 60k miles i think it is normal.
Another problem could be you are not pressing your clutch lever fully or the play of your clutch lever is more than 1.5 cm or you are just not pressing the the gear lever hard enough to shift between the gears.
Before doing any of this, i would suggest simply check your clutch lever adjust the play and try to shift gears firmly while pressing the full clutch lever.
I hope it can help. Keep us posted about it.
Last edited by ridinglearn; 08-05-2020 at 02:08 PM.
Adjust the play on the clutch lever?
Chain and sprockets?
Yea, but that affects the shifting. If there is no play than it can hurt the clutch plates or if it is more than normal than the the gear shifter is a bit hard and requires a bit more push and pull for shifting between gears.
Check this Vid, https://www.youtube.com/watch?v=3DJyTxX-u_c
ridinglearn,
Your links don't even apply to an F6B. There are no sprockets and chain in the driveline and the youtube link applies to a cable actuated clutch which we don't have. The clutch on an F6B is hydraulic with no free play adjustment.