Forgetto Hello, (sorry for my English), I'm from Spain and I have a Speedmaster carburetion 2006, a few months ago, I came fallon a piston. sometimes you do well and others not, I led the workshop, we have checked the coils and are well, we have changed the spark plugs and still ingual, the mechanic told me that failure is the CDI. But I saw on your site that can be pick-up. From Spain have told me that you understand much about the subject.
Can you help me?