W650 is classical look but above W650 is modified so cool.
I can not imagine how fast it runs.
Carburetor,muffler,swing arm,wheels etc. are changed to other motorcycle's parts.
Blue color on crankcase cover is eye catch with Belringer brake caliper.
On W650 after market,several displacement up kit are found in Japan,
from W650 to W750. from W650 to W800.
You do not need to buy new W800 if you got those parts from Japan.
Me? I will get a used W400 someday
and make it low down W400.