This is the 3rd head I have bought and all 3 have bent valves, anyway this head is the best out of the bunch, the original engine that came with the bike was, well fucked!!! and is now being used as a mock up engine.

So the reason why this engine (£50 from Ebay) did not work is because of this

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Here are just some more pictures of the head

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I can't decide whether or not to take the remaining valves out and check those as well, I am going to have to aren't I otherwise if I dont, then murphys law etc. something will go wrong.