Honda VFR400R 1995 → V4 Restoration Project "Pocket Rocket" Part 4(2)

Then, problems with the electrics began, as the order of the cylinder operations was different. I ordered an NC-24 ECU from China; the prices for them at the scrapyards were outrageous, but this one was relatively cheap.

Then it dawned on me that two-output coils wouldn't be enough here, since there are 4 signals, so 4 coils are needed.

Once again, as a temporary solution (for the first start), two coils from Soviet outboard motors, from "Viyterok" and "Vikhry," came to the rescue.

Two high-voltage wires were connected to spark plugs and grounded to prevent the ECU from failing.

I must note a very important detail: the coil resistance should match the manual specifications (there’s no manual for 21-24); I found on a foreign forum that the resistance should be around 4 ohms, if I remember correctly, otherwise the ECU heats up and fails (verified). The coil from "Vikhry," by the way, fit perfectly.
The first start went without major problems, except initially I had to tinker with the wiring due to the different order of cylinder operations.

There were also problems with the carbs. Let me remind you: mine are from an RVF-400, and the engine is an NC-21. There were 2 problems:
1st problem: The throttle rod, which goes under the carbs, was hitting the front head. The solution turned out to be quite funny: we installed the carbs backwards and voilà, nothing interferes, except now the idle adjustment cable, like the throttle wheel on which the cable is placed, is now on the right side.
I also had to flip the air filter mount backwards, which wasn’t an issue.
2nd problem: The choke rods were simply hitting the valve covers and wouldn’t let the carbs seat into the manifolds. The initial solution was this:

after taking measurements from the original rod, a homemade rod was made with a cutout where the original contacted the valve cover. How many times I installed, fitted, and adjusted this rod was a real hassle. After finally dealing with it, I gave up and simply ground down the second rod as much as its thickness allowed and made a notch on the valve cover.

I bought original NC-24 coils

I installed them in the original places on the NC-30 frame. For this, I had to do a bit of work with a grinder and make additional mounts.
They fit perfectly: