Thanks Calum, appreciate the effort

Do you use reserve often? Could be blockage or more likely crap at bottom of tank turn fuel tap off and drain carb, refill in normal position, worth a try

What was wrong with the original engine out of interest, and why the change.

Checked stroke of oil pump and found set at 0.22mm, OK for 3db1 model (0.20 to 0.25mm ), removed shim and Max stroke 0.17mm now, manual says 3rn1 onwards model 0.15 to 0.20. Bike late 89. Didn't seem smoky at all anyway, think running in below 6k for 400 miles left it a bit oily

Jealous me? Not much. (lying) well done, looks good, have picked up another bike as well but too much to do and filled up new shed/ workshop already. Need to sell dt250 1976 , never floated my boat tbh, or build another shed

@NINJA used p1500 wet and dry to flatten back, then bench polisher with fine wax and mop polisher for the difficult to get at bits. Then solvol to finish. Thinking of getting the full stainless system do myself now, would do the spout the same

try eBay France and other European sites, should find one there