kostritzer

here's a good pic stolen from another site that should explain it pretty well, you just have to ignore how the wires are labeled in this pic. Basically the green negative wire going to cylinder 3 would go to the cylinder #2 and #3 ground/driver wire on the VFR harness, and the negative yellow wire going to cylinder 4 in this pic would go to the cylinder #1 and #4 ground/driver wire in the VFR harness. That is assuming cylinder's 1 & 4, and cylinders 2 & 3 are companion cylinders on the VFR engine, which I'm pretty sure they are.

well, my ms paint skills are pretty lacking. I'll try to draw a picture(artistic skills also lacking) when I get a chance, scan it and post it up. In the meantime, if you look at a 4th gen ignition wiring diagram, you'll see two wires going to each coil. One wire is switched ignition, the other is the "ground" circuit which is controlled by the ignition driver in the TCI. There are 4 drivers, one for each coil/cylinder that are actuated in the firing order of the engine, which I can't remember off the top of my head. The reason you want to wire them in series is so that you add up the resistance of the two "stick" coils so that it equals the same amount of resistance of the original factory coil. To do this, you're going to have your switched ignition wire going into one terminal of the paired coils, then on the other terminal of the same coil, you'll run a wire to the other coil, then you run your ignition driver wire to the other terminal on this coil... Ok, a pic would definitely help here.

4th gens have four individual coils that are fired by 4 separate ignition drivers. IIRC my NC30 had two coils running wasted spark, each coil fired both paired cylinders since it was a 360 degree motor and they were adjacent. I would think it's possible to pair up the four ignition drivers(each pair firing two stick coils wired up in series) in wasted spark configuration, at least on a 4th gen. I think I read somewhere that the 5th gen had specific ignition maps for each cylinder, or at least different maps front to rear, so it might run funky if you were to pair up a front and a rear cylinder(which you would have to do since its a 180 motor) to one driver meant for either a front or rear cylinder. Or it might run just fine.

Hey, I always wanted to ask how you did your NC30 rear hub in the 3rd gen swingarm. What did you do to make up the difference in width? So be "nice" and tell me please, with pics! ;)

I hear ya John, I'd only be interested in building one as a track bike anyway. I don't know if Honda would sell you a frame unless you had a VIN to begin with anyway. Also in the article it states that he has a 500cc NC30, would love to see what that's all about as well! I know G-force has them up to 450cc with a custom crankshaft and pistons, but 500 seems like it would be near impossible without custom cases!

And in case anyone was interested in doing a similar project to this RC30, Service Honda lists RC30 frames for $2200 and RC45 frames for $3200... Are they truly available? Well, there are other parts for these bikes listed as discontinued, but the frames are not. In fact, I was able to purchase a head gasket for my NC30 from service Honda, they had it in stock! Just typed in the part number on a whim and there it was!

Love that bike as well Kevin, you and I should hang out! ;)

Ok, you should be able to click on them now to make them slightly larger and more readable.

I'm uploading them to my FB account right now.

Mine too Kevin, its the perfect dark beer as far as I'm concerned.

For some reason the pic's shrunk when I uploaded them.

When I heard about this bike being featured in the new Practical Sportbikes, I just had to jump on it! Its kinda like the ultimate frankenviffer in a way, right up there with HondaRV4's bike. Since I know its not easy for everyone in the US to get a copy of this mag, I thought I'd share the article with people here who would really appreciate it. If you're interested in picking up a copy, it can be purchased from http://www.classicbi...ks.com/catalog/ February '12 issue. Enjoy!