I'm trying to recreate one of the older 400cc supersports that were renown for their amazing handling. To do this I'm starting out with an 04-05 GSXR 600 and wanting to put the Asian Market GSR 400 cylinder, pistons and head on it as well as machine the crank and flywheel to get an engine with less rotating mass. Here is the problem I'm having. I can't find a parts diagram for the GSR 400 to see if it uses the same cylinder head as the GSR 600/GSXR 600. Not knowing Japanese is really limiting in this case I'm afraid. The 600's part number is 1110044G10 The GSR400 years I'm looking for are 06-10. If the part numbers are the same between the 400 and the 600 it would save me about $2500 so you can see my interest in getting the right info. It will basically mean a go/no go with the project. Thank you very much for your time and any help you could give me. PS: The thread about this project has already received universal disdain over in Perfect Line...If you want to bash on me for doing this, please join the pile over there. Thank you.