EXUP Worldwide was born from the ashes of the original EXUP Brotherhood – the definitive forum for all those who have interest in Yamaha FZ, FZR, and YZF motorcycles.
me too have the same headjob, a bit more enlarged holes.....not so good, problem is have to change all the valve guide cause isnt possible to do a clean valve reseat with the guide worked like that........
How much bigger have you gone with the holes and who's doing the work for you.
I've been quite lucky the bloke that's doing the work on my engine has been doing this kind of head work for years and is a real professional in every sense of the word.
hi, I get the head off ebay....so i dont know who did the porting, etc. anyway was made in Swiss, and them are good for doing engine mods. My wall are thinner and holes a bit more enlarged than yours. also the exhaust were enlarged. this head is too much flow for a stock fzr, but the 1125 should work good with that head. the good overall thing is that I also splitted the case for a 6 speed yzf750 conversion....
still waiting for the cilinder block to come, not yet ready. i think will start rebuilt the engine in late april or at worst may. hope to have the bike rady to run in june!
