hi 21 - first, google 'test of lowering kits for motorcycles'..
= video of 5' nadja sitting on many, different motorcycles,
first with her right foot suspended in the air or just touching
according to the standard bikes, then fades into her foot
after lowering the motorcycle[s]..
aside from any valuable info from members of this excellent forum
you can also do searches for 'motorcycle lowering kits' plus
various search keys such as eg 'performance' or 'effects' etc..
always worthwhile to know for yourself what is happening
and how it happens and how this will effect you
even if its only the very basics of it...
generally tho,, lowering the motorcycle using appropriate
mechanically sound devices and installation, of course,
must have some effects aside from your seat height,,
such as say, lower to the ground will take the bike
closer to rocks and other large things on the ground..
it will also take the bottom of the bike closer to
the ground generally, which will bring it closer
under hard braking, etc, but these things wont
effect your general riding on normal roads...
motorcycles can be and are lowered at the steering head
[where the forks come up to beneath handlebars]
for various reasons, including people who are going for
mods related to fast riding and handling etc..
rear suspensions can be lowered somewhat as a normal
part of typical basic rear suspension systems..
the motorcycles are designed around certain parameters
which would include the typical, rider..
she might be typically, 5'7 or whatever the typical
average height might be, with some latitude either way..
doesnt mean that this height is set in stone best for the bike..
there are apparently various options from different manufacturers
of lowering kits, so go ahead and check them out..
unless you go for an expensive leg lengthening surgical process
the obvious option is to modify the motorcycle to fit, you
this is not something that should prevent you from
enjoying the delights of motorcycling..
whatever you decide to do, check out that site first,
to put your brain into gear,, then go for it...