Don't know if this has been posted already but the Washington Triumph branch is now closed. Yes the sales dealership shut down a while ago but now the sevicing dept is also closed and my Speed 400 is to be transferred to the Solent branch to be rebuilt. The new cylinder head has still not arrived from India yet.
That's a rough situation, sorry to hear it. It's a known issue with some Speed 400s having head problems. The long wait for parts from India is the biggest headache for everyone. Hopefully Solent can get you sorted faster once the head finally arrives.