Airheads can quickly become an addiction. Note you already seem to suffer from a scooter affliction.
The high bars and single front disc would suggest it's an American market bike while the Bing dome top carbs were fitted around 1981 as replacements for the flat top Bings.. So, what year is your R65?
Simple machines, they are. Quoting an old BMW sage, "If a Bavarian farm boy can fix 'em, so can you."
Keep us informed, Derek, with more photos. We love photos. [smiley=thumbup.gif]