Appears to be an SOHC 250, smaller sibling to the SOHC 400/450 sold in the states from 78 to 86. Here's a site that might be helpful but it mostly covers US models:
Better that you not use a Clymers at all, get a factory service manual if at all possible. You have some neighbors who hang out here, I'm sure they'll be along with more help.
Welcome to the group. Whatever it is it looks really nice!
PS moved your thread to the SOHC section.