Basics. Excellent.

Google Dixon bate series hitch.

You can get a a spacer plate.

Basics. Why can't you get the rotor to align? Is it tdc on the power stroke?

Tricky. Almost impossible to stop the grit getting in. I used duct tape extensively when I did the complete back axle on my 101, sort of worked, but it was a Salisbury, so well sealed. I used wooden blanks to seal the front axle on my lightweight, but grit got in. So I used a wire brush on a...

It's quite a few hours work. Anyone good will be charging £30+ per hour, so it could be pricey. If I was doing it: I'd start by getting it blasted, identify what's really bad. Unpick the spot welds. Day? Jig it up, then weld. Day? Blast again, and hot zinc followed by epoxy primer. Cost...

The knock was there when the rocker assembly was removed, right?

Oh, photos of the"stuff". I don't think there should be any. Everything should be immaculate. I use brake cleaner and an air line to clean everything after washing in kero.

It's a puzzle for sure. Interesting! Thank you so much for letting us know as you go along

Camshaft related, so. Possibilities are: Oil pump Skew gear Dizzy Fuel pump Rollers Followers Push rods I'd start with the rollers, can be seen from the engine side by taking the side plates off.

Cam follower? The big roller, or the slider? A bore camera down the push rod hole might be helpful.

Not standard fitment in the UK! Interesting. Thanks for sharing.

Probably not, unless there's something odd in the cam follower or push rod area.

Thanks for the updates....

Swiss? Or late emissions control engine. Most have a simple breather to atmosphere. Got any photos, curious!

Which engine is this for?

Rubber grommets on one of the bolts, allows for vibration mitigation.

Under neath. Suggest you invest in a high quality cavity wax and apply to the gap between the tank and the cradle, and apply liberally to all surfaces. I use Bilt hambler dynax S50. Other brands exist. NOT waxoyl. Buy a new fixing kit as well, cheap and cuts out the faff of recovering the old...

It's hard to tell from a video. Get a stick/rod mechanics stethoscope to isolate the knock. Sounds cam shaft speed, not crank shaft speed.

If it's in neutral, then can't be gearbox? Check valves first. I'd look at the dizzy, then the cam gear. Couldn't see from the video, is there oil coming through the rocker shaft?