Fuel Injected 1962 Honda CB77 Superhawk

First couple days back home and a couple good days of work on the bike. Firstly, I got around to making the exhaust system. Took my megaphone hot rod header mufflers and welded a straight tube to the front of each of them, ensuring best I could that they were coaxial. I then cut a slit down the two tubes to expand them, then hit them with some paint after knocking some rust off. Unfortunately, it seems the paint did not stick in one spot and it'll need a touchup. Overall, not a bad look!

The next step, while the "mufflers" dry, was to wrap the head pipes. I used a DEI Titanium wrap that apparently has something to do with volcanoes. I don't know, I'm not a doctor, all I know is that they look friggin' awesome. The material is sort of a shimmering bronze-gray. It looks pretty awesome-- if only my wrap job was better! It was a bit tricky finding a way to cover the head pipe as much as possible while avoiding the O2 sensor, but I'm not displeased with the finished job.

I did get the gas cap all sorted as well today. It wasn't too bad, I just took my time with the drill bit sizes and made use of some epoxy to seal the deal. The clear tube comes up from a t-union with fuel pressure regulator and a second fuel pump inlet. The excess fuel pressure will be diverted from the injector and sent up through the hose to trickle back into the top of the tank. Easy, and looks like some high-tech vented gas cap.

I received the proper hardware for the VR sensor plate, so I got that mounted up. With it I can get the sensor head nice and close to the wheel without worrying about wobble or vibration causing impact between the two. My only concern is how the hell I'm going to make a cover that will fit over all of that! I'll probably have to go the expensive route and have something either CNC machined or, more likely, I'll have something 3D printed and make a casting in either aluminum or some heat resistant plastic.

Finally, I decided to begin with the main wiring harness. I didn't get very far before I called it quits, but at least I pulled the trigger on getting some of it done. Hopefully now that the ball is rolling it will be a mostly quick and easy job.

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Good news! Ugly Option (that's her name, by the way... long story) officially can idle all on it's own! I spent the last 2-3 days wiring up everything, debugging it all, and then finally today, I started it. It didn't fire right away. I had to open up the idle air screws a bit and add about 30% more fuel to start than Ecotrons assumed in the base map. Once it was set, it fired right up and idled like a Harley! Seriously, I could never get an idle like that with the old carbs, at least not consistently!

I still don't have the throttle cables so I have to balance them by hand, but as soon as I get those in I'll start tuning above idle. Enjoy the below video-- before the exhaust hits my phone with an epic kill shot.

http://www.youtube.com/watch?v=7_bR6SK17gI
 
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