Tuning bike carbs and reading spark plugs

Yes, carbs are mounted pretty much at the same angle they are in the bike they came from. I think the floats might be a touch low, as when I go round tight left handers the engine stumbles - In theory, a left hand turn would slosh the fuel such that the floats would close momenterily. However, I have drained a float bowl and plenty of fuel came out. I think I am going to adust the floats to close later and see if that helps.

Definately - Infact, the wide angle of the pictures makes them look 'flatter' than they really are. I would estimate something aproaching 70 degress. In the bike the engine is canted forwards and they come up from the back of the head at a really steep angle and point up to the bottom of the fuel tank. I have looked at pictures.

In addition, when looking at the jets sticking down into the float boal, at this angle they are basically vertical and pointing straight down into the bottom of the float bowl - here is a pic of them partially stripped. A bit ticky to see, but you can certainly spot the angle of the jets VS the outer surround of the float bowl.




Edited to add - I would love it if they could be run at a lower angle as it would make air filters easier. I plan to pull the float bowls off to adjust the floats, and I will double check that the jets at pointing down verticaly when I do.