difference between 064 and 066

[alamo-kid]

can anyone out there sum up the major differences between 064 and 066 is there any/some parts interchangability? any one know or guess at the start/stop of the production dates of the 064



any help is greatly apprieciated


alamo-kid

 

[Ryan Willock]

the 064 was in the 80cc class, the 066 is 91.6cc 7.1bhp