Update so far... I ordered and replaced the following on both carbs: float, float needle, idling jet, jet, and main jet. I also adjusted the thro...

Thank you for the response, and great points around the devil you know vs the devil you dont. I'll work through these items with my pops and report b...

1976 R60/6 that my father bought 19 years ago, I promptly wrecked :(, recently rebuilt by my dad, now owned by me :)... 5dded24572695e7bae722f468...