40 dells and the shakes

[njv]

hello.
made it here from stf seems a bit more relaxed here !!!

heres my question i have a shaking engine at aaround 1600-1800rpm.

now is this when the engine is going from the idle circuit into the mains ?

its super everywhere else so i dont think its my engine out of balance !

could it be a linkage thing its a weber linkage on dells 40 these came of an alfa .

ive just left the chokes as they are with no cables fitted in the off position is this ok ?

many thanks in advance.