I'll just throw it out there,
After some advice I did away with the original 630 chain & sprockets (16/34).
It was said that the 630 chain is at its maximum bend on the 16 tooth front and if they break it
will be at the front punching a hole in the crank case.
Have since fitted 530 DID X ring chain, rivetted link and 18/40 tooth sprockets.
(think it was a 18 front?)
I reackon it changed the bike, real or imagined who knows?
I may try a 42 tooth rear next time, as when the donk feels comfortable, eg. working well,
it puts me in that zone of get busted, we'll take the bike and you're walking home buddy.
It is hard to stay of the gas.