Installed Tri-spark 5 years ago in 1974 Commando. First one failed about 2 years after installation. Sent to Australia to be be checked, and was found to have a bad trigger circuit. It was replaced under warrantee and bought extra stator for $150. Installed this and was fine for bit over 2 years and went out again. When it gets hot the bike would quit and not start until it cooled off or the extra stator was installed. Tri-spark wants me to buy an updated stator for another $150. I am going to cut my losses and throw these 2 stators in the garbage to never fail again. It never ceases to amaze me how people can continue selling a flawed product. Now I feel better.