Salute....
If the bike has not been moving for years, it is possible that the grease has
dried out a bit, which affects mobility.
Put the bike on the main stand and let the engine run with the gear engaged
for 10 minutes, ... the chain is like new again. (... with grease in the box, of course.)
If the sprockets have no (minimal) wear, the chain is also in OK.
The weight should only make a difference of about 200g,
depending on the model (American / European).
I think the increase in performance is a fairy tale, ... go to the toilet before
the trip and only eat something after the trip,
... and you will have a better increase in performance / acceleration. 😁Hi, hi ...
One more note: Under no circumstances should a chain with an O-ring
be placed in the chain case, otherwise it will destroy the chain and the
rubber hoses of the chain case!!!
Greetings Bruno