A question about Suzuki GSXR 600, 2004 injector

Red lamp is flashing on the panel and the temperature window shows an error F1

I've been told at repare station that electric engine, which closes drossel, is out of order, and that's why they don't move at start up. And it is sold only with the corpse of drossel

And I wonder if it could be changed separately or only together with drossel Or maybe there's other reason for mulfunction?

 

The red lamp will flash a certain number of times. That number and a manual will tell you what is wrong. Did you work on the bike recently? You can get a CD manual on ebay for cheap.