Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
Sounds like you have tried to set the valve clearance while the cam was keeping the valve open, and how the clearance is way (WAY) too large.You can only set valve clearance (tappet adjustment) when the cam is pointing away from the valve, you have to rotate the engine in order to get to that point for each valve.
Is there an error in the Honda manual? I've attached an image of the page, it says and illustrates to turn the crankshaft clockwise, yet everywhere else on the internet seems to be saying counter-clockwise , which is it to be? It says the first adjustments should be cylinder one, both of them, but the inlet tappet is sitting far higher then the exhaust, I thought these things needed to be in their high position to be adjusted? I've got to relearn what I had no trouble with on past twins ...sorry if I'm starting to sound like a dork!
I suspect that on the internet they are standing on the left of the bike where number 1 cylinder is and clockwise from the points end is counter clockwise looking at the alternator end if you get my meaning?
Have fun!