Find a long length of flat and level concrete.
Make sure chain is lubricated.
Sit on your bike with all of your riding gear on, if you normally carry a pillion, both of you on the bike fully kitted for riding.
Very slowly move the bike forward while a friend finds the tightest point of the chain (mid way between front and rear sprocket)
With full riding weight compressing the suspension, bike upright and chain at tight spot have friend adjust the chain leaving approx 20mm of free up and down movement.
Chain adjustment isn't an exact science. There are other ways to do it but the above simulates road conditions and has worked well for me over the last 55 years of looking after my own bikes.
Make sure chain is lubricated.
Sit on your bike with all of your riding gear on, if you normally carry a pillion, both of you on the bike fully kitted for riding.
Very slowly move the bike forward while a friend finds the tightest point of the chain (mid way between front and rear sprocket)
With full riding weight compressing the suspension, bike upright and chain at tight spot have friend adjust the chain leaving approx 20mm of free up and down movement.
Chain adjustment isn't an exact science. There are other ways to do it but the above simulates road conditions and has worked well for me over the last 55 years of looking after my own bikes.