Taky decomp cams , there everywhere . get them from classichonda , there expensive as . and you will need an adapter peice if your running it on a chinese engine.
A quick update
Anyone considering putting the v2 head on the 160ho engine I have learnt that you need to either change the piston or make the exhaust valve relief in the piston a bit bigger.
I tested my clearances before assembling the engine and although it was a tight fit it was ok. It ran for a few hours fine but it seems once the engine gets hot it causes problems. The piston hits the valve by the slightest amount but its enough to bend the valve slightly.
Hope this helps somebody.
I have already done it thanks mate. I got a tb piston from classic honda. works a treat.
I posted this because ken told me it wasnt needed and in some cases he may be right but not in my case.