i know this can be done, but do the 600 fairing only fit on a NC23 or a NC29 ?
or both?

Both...

do you though the modications and extra's required to fit the fairings?

Use the search function. Has been covered quite a bit.
Why not fit the Tyga kit. looks pretty fecking sweeeeeeet!

i've looked at the tyga, but the front headlights are just not my style..
btw, with CBR600 kits on the CBR400, is it still possible to get the underseat zaust?

DK-Tandy wrote:i've looked at the tyga, but the front headlights are just not my style..
btw, with CBR600 kits on the CBR400, is it still possible to get the underseat zaust?

everything is possible mate....depends on your creativity, money and time....

and thats a 400 :O

how did you find out about doing that? is there any tutorial websites kinder thing for it?

DK-Tandy wrote:and thats a 400 :O how did you find out about doing that? is there any tutorial websites kinder thing for it?

Mate, there is no tutorial - just buy fairing and start doing this...

This one below ever with CBR600 swingarm, not only fairing...

not trying to rude, but could i have rough estimate on the costs from turning into a CBR600 look-a-like