I don't think this problem is only related to Americas & Speedies. I know of a couple "standard" Bonnie CDI failures. I have a very low mile 04 Thruxton thats had one go out, the CDIs on "standard" Bonnies are under the seat.

Moisture might have more to do with the problem. My Thruxton was running great till one day I got caught in the rain only about 5 blocks from home. Due to construction in the area the asphalt was muddy, so I rinsed the bike off with just the plain hose, no spray. Two days later the left cylinder is not firing, checked everything. Switched out a CDI out of our T-100 and varroom!

Gill makes these CDIs, BMW also uses them I think.


Every normal man must be tempted, at times, to spit on his hands, hoist the black flag, and begin slitting throats. H. L. Mencken