Hi Steve here first post.  looks like a very informative site. I am a big fan of the TR1 and have some questions.
Do any of the other model virago 1000/1100 engine parts fit on the 920 engine?
I see a lot of similarities with the cylinder head on the Yamaha XT500. Are they interchangeable? How about the XT 600 cylinder heads?  It being a 4 valve seems like an oppurtunity!
Cheers

Steve

This is a quote from a few road tests that I have read " It shared a few characteristics, in that the barrels appeared loosely based on that of the SR500 single (They weren't; they were a new design which just looked similar)" So reading this I don't think that they can be used but I stand to be corrected