Sleeving Vintage Amal carburator

[NeiljohnUK]

Proper resleeving is possible with care IF the original mazak like 'monkey-metal' hasn't started to crumble. Though these days I'd be looking to rebuild with one of the Belzona (or JBWeld) products first then honing out to original size, even if the parent metal is doubtful.

[Frank S]

Proper resleeving is possible with care IF the original mazak like 'monkey-metal' hasn't started to crumble. Though these days I'd be looking to rebuild with one of the Belzona (or JBWeld) products first then honing out to original size, even if the parent metal is doubtful.

While Belzona or JBWeld or similar products have a great range of uses and might even be a viable solution in this instance.
The bore would still have to be bored out then the product applied then bored and honed.
My concern would be life expectancy and wear factor or the possibility of fuel causing deterioration the Slide would still need to be remade.

thirdbike has also asked about the possibility of using a reamer in the bore.
If one had a fixed size reamer say .002" oversize to the bore this would probably be 1 of the better ideas but after the bore was reamed to round and clean an internal lapping or burnishing tool would be required to polish bore and a new oversized slide could be made
If the epoxy like products were used the bore would still require lapping

[NeiljohnUK]

While Belzona or JBWeld or similar products have a great range of uses and might even be a viable solution in this instance.
The bore would still have to be bored out then the product applied then bored and honed.
My concern would be life expectancy and wear factor or the possibility of fuel causing deterioration the Slide would still need to be remade.

thirdbike has also asked about the possibility of using a reamer in the bore.
If one had a fixed size reamer say .002" oversize to the bore this would probably be 1 of the better ideas but after the bore was reamed to round and clean an internal lapping or burnishing tool would be required to polish bore and a new oversized slide could be made
If the epoxy like products were used the bore would still require lapping

Indeed the epoxy would require boring to size, with finishing to suit. I've been using Belzona for years and never had an issue with fuel, the Weber DCOE's I repaired with it in 1978 are still leak free, and industrial use has proven just how good a wear material it can be, a brass sleeved slide in a body lined with it would last for years. JBWeld is pretty good too, and a lot more affordable, my recent motorcycle repairs to a 10 year old BMW 'F's oil/water heat exchanger were done with it to keep costs down, fuel resistance should be ok but I've not used it in that way so I can't confirm what the manufacturer claims.

[thirdbike]

What the "original" carb rebuilders did was to clean up the carb bore to oversize and put a brass sleeve on the slide. In other words the bore is left oversized.
An epoxy product might be a option for application to the slide. I am wondering how well an epoxy product will adhere to the the pot metal especially as the slide needs to get shaved down to size. It might take a trial and error session to see how well that works out and then let it soak in the new ethanol blended gasoline.