I'm riding a ZXR400 too. Mine is L9 model. There are different
models for ZXR400. H and L model. For L model, there's L1 to L9
depending on which year it is produce. I like the bike very much as
I find it very power. It has the most BHP when stock compare to CBR
or RVF. Top end want to reach 220km/h is not a problem, think the
top should be around 230 to 240km/h. Handling wise is very stable
with front inverted forks.
Alot people say Kawa parts rare and expensive but they now have
agent in Singapore namely Evershine Auto, so getting the parts
shouldn't be much problem. But the MOST important factor when you
want to buy a bike be it RVF for GSXR, as long as you like the bike
can already, don't need to care what others say. 
