None fazer Question (xj900f Igniter box)

[His Dudeness]

I'd say unfazed is on the money. If it's a project bike that hasn't run in a while it makes sense that a ground might have been missed or the wrong connectors were plugged together. Another possibility could be that a component in the ignitor failed short so too much current flowed but that seems less likely.

The igniter boxes on these are a bit fragile but are repairable. The transistors can be replaced by hand if you know what you’re doing. Normal failure mode is firing on 2.

As suggested, have a check through the wiring for any corrosion which will cause high resistance.

I don't think he's looking for corrosion. I think he's looking for signs of excessive current flow so burnt/melted connectors or wires. If the problem was caused by plugging the wrong connectors together or missing a ground the wiring could be damaged as well as the ignitor :'(