Float height 500 k1

[Honda enthusiast]

Quite right too, Mick dogs are part of the family 👍
I'm waiting for my carb kits now, I've got a starting point by balancing the carbs and it will tick over smooth at 1100 rpm but to get it to rev cleanly and idle the mixture screws need to be almost out. I'm pretty sure it's the float level masked by the worn needle springs and possibly also the slow jet which might have been cleaned with a wire...both hopefully sorted with the carb kits

[deltarider]

[...] Julie the needle is on groove four from the top, I understand that's where the US bikes were, is that right? [...]

For a full understanding and why some of us hold 4^th position of te needleclip for questionable, you may want to consult this overview and read the subnotes in particular.
For an experiment I have my needleclips in 4^th. So far I regret it. In all other markets that also had the 627B carbs, 3^rd position was standard... Same goes for the markets that had the 649A carbs.

[Honda enthusiast]

I'll move my needle to middle (third) position then and see what the result...ATM it's running so rich it won't rev cleanly....cheers 🥂 with a bit of faffing I'll get there

[deltarider]

Any blockage in the air intake, like a forgotten cloth underneath the seat?

[Honda enthusiast]

No there's no cloth there, cheers 🍷

Thanks all who helped, I've sorted it now, fitted the Tourmax carb kits and put the needles in the middle groove, float heights 22mm and screws 1 1/2 turns out...super idle now at 1100rpm no clutch rattle...revs cleanly no misfire now...

😄👍✅