Aerox Carburettor Inlet manifold

[KristianAerox]

I have an aerox yq100 that I am currently restoring and the idle is currently uite erratic, so I sprayed WD-40 around the Intake manifold that links the carb to the reed and it started to surge, I removed the old manifold and sure enough there was a split. The only issue is that I am having trouble finding the yq100 carb manifold and the ones that I have seen have been really expensive, Im just wondering if there is any differance between the yq100 manifold and the one of the yq50? the yq50 ones are much easier to find and even the performance replacements are much cheaper than the yq100 manifold! Any help would be much appreciated! Many thanks!