A65 Rev counter

[MartinT]

Hi, i`m new to the forum, but not new to BSA`s i`ve been  owning and riding them for over 40 years. But this is my first experience of rebuilding an A 65 (don`t know what year as it`s an import) but engine numbers are A65L 9946, i`m assuming it`s a Lightning?
My question to the knowledgeable people is can you please tell me what bolts are needed for the rev counter drive take off on the engine.
Thanks in advance.

[A10 JWO]

Should have two carbs then. Depending on the year 1/4" BSF by 9/16" Phillips . Most parts are easy to get, good luck. I built one two years ago. Don't be frightened to ask ?