I'm sure someone'll be along in just a moment that'll probably jump in and give you a straight answer, but I'd want to know more information beforehand...
Q. What year / specification of bikes are you talking about?
There are differences in (apparently) the same model 'names' depending on what year the bike was manufactured.
e.g. Not all '996' bikes are the same (obviously).
I'm guessing that you're talking about trying to take a 4-injector setup from an 'SPS' specification machine (not sure what you mean by 'TB') and install on a non-SPS (Biposto) specification 916, yes?
My next question would be... Why? What are you trying to achieve?
If you've got everything else all kitted out, dialed in, and fully sorted then I might say 'fill yer boots', but if you're after 'more power', then you might be barkin' up the wrong tree(?)
Sortin' your gearing will (most likely) give you the same 'seat of the pants' rush ('feels' good) and be more usable (e.g. stock gearing isn't optimal)
That's my 2p worth for the moment...
G
