oil light on after rebuild

[Sin_Tiger]

 It's possible you had an air lock but I can't figure out how hat  but that's a handy thing to know and I'll bet there was a huge sigh when that light went out 

[beefos]

Yes - very relieved!!!
Possibly an air lock and the oil from the opposite direction helped drag the oil through...

[BruKen]

I've been following this with some interest. After rebuilding my engine the oil pressure light flickered  for the first couple minutes or so and then settled in and never had a problem since. I wondered at the time if it was a priming issue but as it was the first time I had ever started the engine was more concerned that it sounded like a tin of nuts and bolts being shaken vigorously. My dismay was absolute and to be frank was beyond caring about oil at the time. Subsequently I found out they all sound like that and indeed mine better than most. Fantastic bikes, but I every time I take it in for a MOT and hear the mechs revving her up in the garage I still cringe.