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I’m having an absolute nightmare finding replacement valves for my Takegawa DOHC head after bending them badly. It looks like my only option now is to get a set custom manufactured but I need to supply drawings to get them done. I have no problem with 90% of the dimensions but due to the valves...

Hi All, after a catastrophic engine failure I’m currently rebuilding a Takegawa DOHC head but I live in the UK where these are rare so information is very scarce. The only damage is to all four valves but I’m having trouble getting a replacement set. Does anybody know of an alternative to...