Perhaps
it is a story of a motorcycle.
.........................................................
Does he say
the torque,
or speed?
I seem
it has moer good way
about this under story
than Drags of fuel.
The bike (chain-drve-type)
has 2 sprockets
on the front(engine-side)
and the back(wheel-side.)
and if the front sprocket is
more large,
How many chain bits(piece of chain)
does the (more large)sprket
carry than your normal size sproket
during one revolution,?
I don't know
your moto's Engine displacement,
I seem your
one exhaust(Displayed number)
is minimum 80cc(2st),
You will feel someting change
after sproket changing.
and you must care
front sproket's space.
Does he foget
sproket and "chain"size,
and "rear sproket"?
and he will wonder
he must cut that's chain more
short.
"Be careful with traffic safety"
Good luck !