CLEMTOG
Hero member
I am sure that this has been done before, but I havent actually logged in by who or even when, so here goes.Most spigot mounted 180 type carbs are now worn out, if not even sufferring the dreaded cracked stubs from "wiggling" them off the alloy manifolds which are shrouded in that hard nylon spacer for heat transfer reduction.
I have binned mine (no they arent on ebay) and replaced with RGS type.They are more or less the same carb except that the mount is on a rubber manifold (when on an RGS) those manifolds are expensive and they perish, used ones even command a high price second hand.I fitted mine on Jota 120 inlet manifolds (genuine) which are basically an adapter for a tubular rubber connector,from the cylinder heads oval flange, new O rings on them of course, I used genuine parts again, which are available from Slaters, but you could use a plain rubber hose, I removed the bakelite spacers (shorter 7mmm studs needed) since you need the extra 5mm or so of clearance under the centre carb, and the rubbers will do a good job of reducing heat transfer,(like any mosdern bike) and bolted everything on, stainless hose clamps (Slaters again) complete the job.The 7mmm studs came from a scooter shop by buying M7x50 hex set screws for the seat on Lambretta for about a quid, and cutting the right amount off the end, keeping plated end on show externally and the raw cut end inside the head (with a touch of copper slip)
here are a few pictures, if Simones tuition still works, we will see, but as there are plenty of RGS carbs about, I see this as an economical way out, even though the Jota 120 inlet manifolds will be hard to come by.There is a manon ebay (handle Elegog) who makes turned/milled inlet manifolds and I am sure he could adjust his procedurre to make the shorter and slightly different Jota 120 types.These have a double groove in them which locate in the genuine rubber tube.
CLEM
I have binned mine (no they arent on ebay) and replaced with RGS type.They are more or less the same carb except that the mount is on a rubber manifold (when on an RGS) those manifolds are expensive and they perish, used ones even command a high price second hand.I fitted mine on Jota 120 inlet manifolds (genuine) which are basically an adapter for a tubular rubber connector,from the cylinder heads oval flange, new O rings on them of course, I used genuine parts again, which are available from Slaters, but you could use a plain rubber hose, I removed the bakelite spacers (shorter 7mmm studs needed) since you need the extra 5mm or so of clearance under the centre carb, and the rubbers will do a good job of reducing heat transfer,(like any mosdern bike) and bolted everything on, stainless hose clamps (Slaters again) complete the job.The 7mmm studs came from a scooter shop by buying M7x50 hex set screws for the seat on Lambretta for about a quid, and cutting the right amount off the end, keeping plated end on show externally and the raw cut end inside the head (with a touch of copper slip)
here are a few pictures, if Simones tuition still works, we will see, but as there are plenty of RGS carbs about, I see this as an economical way out, even though the Jota 120 inlet manifolds will be hard to come by.There is a manon ebay (handle Elegog) who makes turned/milled inlet manifolds and I am sure he could adjust his procedurre to make the shorter and slightly different Jota 120 types.These have a double groove in them which locate in the genuine rubber tube.
CLEM
