Zero Motorcycles is reporting a very serious defect with its 2012 model year bikes, specifically affecting the Zero S, Zero DS, and Zero DSP (Police) models.

The recall concerns Zero’s battery architecture for the 2012 model year, which may cause cells to fail, and thus create a runaway “thermal event” (read: catches on fire) within the battery pack.

In total, this recall affects 218 motorcycle units – the entire volume of Zero S, Zero DS, and Zero DPS motorcycles that were sold for the 2012 model year.