I suspect these were off a XS250, but there was little difference, apart from Jet size on 360 & 400 models. These weigh 2.7Kg, the same as a much better pair I will be listing?
They will be couriered within 3 days or you are welcome to collect most days from PE6 0QN. These are simple carb's to rebuild provided you are careful removing the phillip headed screws. Rebuild kits are still readily available & generally cheap as are new stainless screw/bolt kits.Back in the day we used to paint or polish the externals with a simple electric drill mounted brush. As they clean up & then polish well. Happy for you to collect from PE6 0QN, I'm about most mornings after 11am. & have a number of other XS 250/400 parts. If you are too far away. I will happily photograph & list items if you tell me what you want. Or I will combine courier costs wherever possible, but have blocked UK Highland & Island destinations. As the couriers charge more.