well:
the sp is a track bike , with thin seat /clip ons position ; got a good engine with no much low grunt (but is also fully tuned with ported head , hrc camshaft and spings ,full akra,and so on)
for the sc57 2004 i had first the idea to convert in something like that (after more than 6000 euro in parts only in the 2015 i m pretty happy with her)
than i bought the cb..... :thumbup
when U start the bmw she s got a really noisy engine not to compare with hondas or suzukis (i own aswell lot of suzys)
So noisy sure u will think something is gonna explode (bike is pretty new with 1200 km
)
If i must compare to the cb1k with s1k would say ( the cb is already heavy tuned)
pro :
got lot of bling bling ,heated grips , tc ,cruise control , eletr. suspension, more maps , QS and so on
kick your ass with lot of hp
build with quality like honda in the 90`(i know what i m saying)
contra:
steering ratio is ducatis
feel really big and actually is bigger
clutch lever is designed by some retard
it s a bmw