Beautiful looking bike!! I love the tank and the fuel line too.
You know, in the first pic with the cutout in the clutch cover and the third pic with the clutch arm cover off I though at first you might have bolted the clutch solid and were going for the real clutchless boardtrack effect. Not very practical I know but in keeping with the original concept of the boardtracker anyways. I might consider that myself when I get around to building my first boardtracker.
BTW, how did you conceal the rivets after soldering the tank?