A post from Jerry on the IPCRC brought up the point that the throttle bodies that the VT750S uses have a 90 degree bend in them to allow for a side air cleaner box. That won’t work very well with the PC800 setup.
Looking at the PC800 microfiche, I wonder if I could use the PC800 throttle body and carbs with some heavy modification. I could drill out the jet ports to install the fuel injectors. All of the random diaphragms and other parts could then be removed and the various leftover holes could be sealed with JB Weld or Hondabond High Temp Engine Sealant or screws or metal plates, etc. It wouldn’t be as good as a purpose-made throttle body but it might work. And it wouldn’t require any modification to the stock air box.
Now if only I had a spare set of PC800 carbs laying around to experiment with… I fear I will be removing the carbs on my bike several times to take measurements and figure things out in the coming months. I’d rather have everything ready to drop into place once. It wouldn’t be so bad taking apart the bike all the time except for the small problem of me not having a garage. I do all of my work in a parking lot outside the fraternity where I work (I’m the house dad). I have to button up the bike every time I’m not outside working on it. That becomes tedious very quickly.
I wonder if there are any automotive throttle bodies with fuel injection that would be the right diameter. Or maybe motorcycle throttle bodies. Surely there must be some vehicle with the same diameter intakes.
Well hmm… I’ve been looking at the microfiche again for the VT750S… I see the crazy 90 degree bend although the injectors are in a good place (directly above where air and fuel would be introduced into the engine). I’m almost positive that the manifold internal diameter is the same as the PC’s internal carb diameter. It’s just that 90 degree angle… that really screws things up.
There has to be another bike or a car that has the same internal and external sizing so that I can easily connect the things together. It’ll require replacing the throttle bodies since the ones on the PC are attached to the carbs. And since I will be placing the injectors below the throttle bodies, I will need more room than the stock configuration would allow.
I’ve seen several websites that sell throttle bodies and multi point injector kits but they are always absurdly priced. I don’t need a kit for a Ferrari. I just need a kit for my motorcycle.