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rebuilding carbs
exvalvesetdabbler:
Drain screws from AliExpress
O ring seat 9 mm, screw head 9.4mm
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Might work if there's nothing else but doesn't look right. Back to plan b for these.
Regards
Dave
Oddjob:
Fairly sure there was a seller of these on eBay but they weren’t exactly cheap
exvalvesetdabbler:
The problem with them screws is that there is very little contact area between the screw head and the carb body, essentially a ring 0.2 mm around the screw head making contact and no friction as you tighten them which in the wrong hands could easily result in stripped threads or them working loose.
A heads up for anyone else thinking of buying these, check that the head diameter 12mm. I didn't loose much with these ay £3.50 for 2 , I just added a couple onto an existing order get above the free postage threshold.
NRP have the Keyster ones back in stock now at just over a fiver each. Might have to bite the bullet. I'll hold off for now until I have sorted through all the spare brassware to see what else I might need.
Does anyone have any good tips for cutting neat screw slots, I have seen something somewhere about folk grinding the set off a hacksaw blade to get the right thickness? Machining the threads and holes be easy enough and I have enough round brass bar laying around.
Regards
Dave
K2-K6:
--- Quote from: exvalvesetdabbler on May 06, 2026, 11:33:22 AM ---The problem with them screws is that there is very little contact area between the screw head and the carb body, essentially a ring 0.2 mm around the screw head making contact and no friction as you tighten them which in the wrong hands could easily result in stripped threads or them working loose.
A heads up for anyone else thinking of buying these, check that the head diameter 12mm. I didn't loose much with these ay £3.50 for 2 , I just added a couple onto an existing order get above the free postage threshold.
NRP have the Keyster ones back in stock now at just over a fiver each. Might have to bite the bullet. I'll hold off for now until I have sorted through all the spare brassware to see what else I might need.
Does anyone have any good tips for cutting neat screw slots, I have seen something somewhere about folk grinding the set off a hacksaw blade to get the right thickness? Machining the threads and holes be easy enough and I have enough round brass bar laying around.
Regards
Dave
--- End quote ---
Something like this https://www.ebay.co.uk/itm/336154261880 available in 0.5mm thickness, but would need rudimentary mount to drill etc and some method of holding brass bar and moving across this, thinking lathe cross slide and dremel ?
A woodworking mortise hand saw will cut brass more accurately than trying to hold a hacksaw blade straight enough, could be utilised.
exvalvesetdabbler:
I have slitting saw, but at the moment I'm only set up to mount it on an arbour between centers and used to cut hexagon on the end of round bar held in the tool post. I might need someway to get up/down movement. I could just cut the slot to limited depth which would be curved same as the saw radius and then just flatten out the slot with small file.
Dave.
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