Today I am making a modified cdi + cr80 coil.
I am still missing two more capacitors (still on the way from ebay seller).
I follow the instruction in this thread:
This cdi can have spark timing adjusted by arranging the jumpers.
And by using this cdi, we can now use CR80 separate coil which has stronger spark.
I am hoping for better performance from retarding the timing and the CR80 coil.