I have very small cracks in the intake manifolds on my XS360. It looks like a black coating on the manifolds that is cracked and continue out to the portion that is covered by the clamps..

Do the manifolds need replacing ??. Thanks again

I have very small cracks in the intake manifolds on my XS360. It looks like a black coating on the manifolds that is cracked and continue out to the portion that is covered by the clamps..

Do the manifolds need replacing ??. Thanks again

they do age and crack. they will need replacing soon, as they will suck in air.

they do age and crack. they will need replacing soon, as they will suck in air.

Thanks drewpy. It sounded like a dumb question but It appeared like the metal portion of the manifolds are coated with some sort of black material.

My thought was maybe it is only the black stuff that is cracking and the manifolds are ok. I'll take them of as soon as I get time and give them a good look see.

I've had good luck getting new OEM parts from Yamaha Parts Direct.

if the manifold sucks in air this will cause lean running and holed piston crowns