Why would my 2005 Triumph Bonneville America go through two IGNITION CTRL UNITs in two years. The last one didn't work after storage all winter. Is frezzing weater bad for them? Should I remove it for storage?

I'd guess spark plug range is your most likely issue. Unless you just have some loose wires - check for that first. Research your area's weather, and make sure to check with Triumph regarding spark plug recommendations. This information could be in your Owner's Manual. Always use plugs that match your riding style AND the weather. You shouldn't have to remove the ICUs in the winter. If you think you do, maybe check for shorts in the system. You shouldn't be getting any ground leakage at all.

Mainly its because GILL electronics make crap goods, triumph has had thousands of complaints about this but refuse acknowledge any problem. they have rubbish after sales service and the 2 year warranty isn\'t worth a wxnk its a shame nice looking bike bad rep because of bad electronics and shoddy service.