"Are the front sprockets in these things that crazy to get to?" - yes, they are British. You could try pulling on the top and bottom run of the chain to free it up. Worst case you have to pull the clutch and take the door off to unpack the chain.
Sounds like you didn’t keep some restriction on the feeding side of the chain as well as pulling on the other end, chains seem to like to jump the teeth and put the next link a tooth early if some tension isn’t maintained.
Life is stressful enough without getting upset over the little things...
I've had this a couple of times and the way I got it out was to pull the chain hard in the opposite direction it was fed.
Another way is to use a USB endoscope with mobile phone and see where the chain is kinked and locked against the cases. Then somehow use fingers, screwdrivers etc. to lift the kink off the tooth and pull the chain out.
1968 A65 Firebird 1967 B44 Shooting Star 1972 Norton Commando
John, do check the new chain, if it is not wider than the old one. There is not much place at these Unit engines. Unfortunately there are various widths of these chains around. There is no way to fit an o-ring or x-ring chain on A 65s. Just saying...
"There is no way to fit an o-ring or x-ring chain on A 65s" - except by using narrower sprockets. Have you thought of downloading a repair manual from classicbritishspares (CBS)? They are free. Might help.
Thanks for the replies guys. I’ll try and track down a good video of the clutch.
Is there a how to anywhere?
Any parts that should be replaced while Un-effing the chain? Reuse/reset the tensioner?
For some great A65 videos I would suggest The Classic Motorcycle Channel on YouTube. The Classic Motorcycle Workshop series (within The Classic Motorcycle Channel) is great, lots of "hands on / how to" information.
Specifically for the A65 look at "Low budget classic motorcycle restoration", a 13 part series which chronicles the host's project 1967 650 Thunderbolt. Part 2 shows the assembly of the drive sprocket and clutch assembly which will help you visualize what's back in that dark hole.