Onederer
Ex Member
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I think ifn yer gona do EFI, you'd need the tools to do it rite, or else performance/mpg/reliability would suffer. Correct software, EGT-O2-head temp-oil temp sensors, maybe more, A dyno would shorten tune time. Maybe even a exausht gas analyzer. The fuel and timeing curve both would need calibrated, so that would mean a totaly new cdi box that worked with the EFI. You'd definatly have to permanetly add sensors to the bike, and a knock sensor would be nice. Would need to add a electirc fuel pump, and that might require a higher stator output than stock, and if you mounted the pump outside of the fuel tank, the pump noise might be iritating, and if you mount it inside, you'll loose fuel volume with the stock tank. If you cant find anyone who has previously done this, then you'll be the engineering pioneer, so get ready to stop riding for a while, as you tune. The FS series BMW 650's are singles, and fuel injected, so a look at thier parts might give you some idea's, and/or doner parts. Basicaly with fuel injection, you tell the engine what it needs at rpms/load/temp etc, and getting rid of lean or fat spots can take some time for a project like this. You need to at least be VERY familiar with modern fuel injection to finish a task like this. Manufactuers and aftermarket companies have $$ and several ppl to acomplish these things. It CAN be done, but unless the market was big enough to sell $1,500 kits to a LOT of ppl, you'll just be doing it for a challenge and a pat on the back, which is'nt enough for some ppl. Then if your really charatable, you won't mide devulging all the details so someone else has it easy. I'm sure you have put some thought into this, but what if you spend all that time and money elswhere on the bike? I am not trying to say you'd be wasting your time, its yours, use it how YOU like, and it would be cool to see it done. Don't expect fuel injection to turn it into a bike it is'nt, biggest improvement would be cold starts, and altitude changes, not HP or MPG. CV carbs work great, and EFI barely beats them. The $300 bones that the carb kit on here cost, would be a much better choice, if you wanted to be riding soon with extra zip and maybe even MPG. Manufactuers are using EFI now a days because they all do and cost has come down, and EFI can keep a tune longer than carbs, so EPA is happy. Really if EPA cared they would bring back catalytic carbs that got extreme MPG, but the oil companies put lead in the fuel years ago to kill the catalyist in the carb,(to cushion the vavles was white lie) so extreme MPG carbs would disapear, and then when ppl forgot about the carbs, they quit puting lead in the fuel(also so they could use catalytic converters on the exaust, which lead kills), but even now there are "detergents" in the fuel that would kill catalytic carbs. OK, I have bla bla blabed enough, so much so, that I see justin has posted what I have said, in much more straight foward words. Oh yeah, when Harley put EFI on thier bikes they found they idled too good, so they had to tweak it to get the potato potato idle that sells so well. The foam in the factory seat reshapes VERY easy(there is way too much foam anyway) with a dual orbiting sander, shape it concave and back, and it is very comfortable, but if you take much off you'll have to make a new cover to fit rite. Sewing machine, $15 of stretch vinyl,hevy duty needles and upolstery thread is all it takes. I think I've efectivly left everything in soup form.
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