A leaking manifold means excess air goes into your engine - this can cause erratic idling, poor performance and hotter running. Replace that old cracked and/or perished manifold to ensure a reliable intake connection!
Brand new original intake manifold from Piaggio, to suit the following Leader engined models using the manifold pictured above (same vacuum connections):
Piaggio Fly 125/150 '04-'08
Vespa ET4 (also ET8) 125/150 '00->
Vespa LX 125/150 (check photo)
Please check the photo to ensure fitment.