Carburetor (idea)

(see all of Carburetor, there are 2 more in this node)

To complement thecarp's wu, fuel injection is and has been available on motorcycles for some time. Mostly on sportbikes though, even the six cylinder Valkrye is carb-based. I've heard of bikes that, after you tear the seat off, you can see a fuel mix ratio on an LCD display to tell you if it's running rich or lean. Wow.

When I first heard rumor of bike-borne fuel injection I called up my former bike mechanic brother. He verified it is real, but "scary". I concur; this seems like more electronics and mystery then I care to deal with during a weekend bike tuneup. Providing accurate fuel mix to six or eight cylinders in a car or truck is one deal, EFI (electronic fuel injection) can have that. Providing it to one or two high performance can-not-fail cylinders is another.

Update: And according to sbeitzel, BMW K series has been doing fuel injection on bikes since the early eighties.