Why?
Lots of early classic sportbikes - GSXR's, Ducati's- used clip-ons and conventional forks.
The B12 has tree trunk 43mm tubes that were good enough for 150bhp Superbikes running slicks thru the early 90's. The inverted units of today are nice eye candy, but 90% of street riders cannot even approach their full potential on the street. And thats probably a good thing. The fact is that they are overkill on most street bikes.
I have run my '83 750E with clip-ons and a .5 inch rise in the triples for 20 years.
You will be shocked at the handling transformation by raising the tubes and fitting clip-ons. Front wheel feedback is greatly improved, countersteering imputs are second nature- the front end just feels more planted.
I also use aftermarket fork springs and a fork brace on both bikes.
Ride On, Ed.
2005 GSF1200SZ
1983 GS750ED