I use my F4i on the track only and after crashing it last summer I rebuilt it with an aftermarket faring stay. Problem is, is that stupid gigantic brake reservoir hits it now when I turn the bars all the way to the left. If they notice that in tech they will not let me out. My question is, is there another master cylinder from another bike I can get that will work? Ive heard of the 954 and 929 cylinders working but I want to be sure these or any others are ok. Like I said this thing is used for the track so it REALLY needs to work well.
Thanks

 

Same thing happened to me. Did you replace the lower stay? That was the one that was bent on mine. Replaced both, and coupled with adusting the throttle cable 90 degree metal tube out of the throttle housing up top, and adjusting the resovoir off of hte clip on I got it to just barely not hit. Maybe you can try that. It takes some wiggling but it catches the stop right as its about to hit...

 

You can make pretty much any sportbike master cylinder work.