TOPIC:

I just put the 4 base gasket O-rings on before putting the cylinder block on, but wasn't happy with the O-ring fit. They don't sit fully in the recess, I'm guessing this isn't correct? They seem to be slightly bigger in diameter by a very small amount. Maybe I'm worrying too much and they get pushed in to place by the block but It seems a bit off to me. Any thoughts?

Definitely not fit to install. The O-rings should seat nicely in the recess and sit about 15% of thickness of the o-ring above the half joint. That's standard o-ring fitment practices .Proper o-ring sealing is achieved by compressing the o-ring 15%

Ah ok thanks. I'm now concerned over the quality of the rest of the gasket set .Maybe I'll try an source some 0-rings locally.
Getting this bike done has been brutal every step of the way.

Don’t despair! It’ll be worth the effort.

Thanks for that. I'll keep pushing on with it. I'm looking forward to riding the hell out of it come summer time:) . It's the only bike I have that my wife is happy to join me on.

Oh, what are your other bikes?