Reply To: Put some upgraded coils and sprake plugs on my bike now goes 64
Furthermore,
E. Electrical.
Clean the laser plugs hard. = Do A to D first above before going for a test run with clean spark plugs
– Then take them out.
Take 6 pictures (threads of plug, and also the middle of plugs) – Then i will assess how your bike is burning fuel. I will know if it looks like either air or electric or fueling is a weak link.
I will also quote a picture for you from the service manual that mentions other reasons for a speed drop. Remember a brand new bike does 82-88 factory , i have various hyosungs so i tend to know how they are!
You got this!