T140v Rough Running - Left Side Missing

It might be worth swapping the coils over to rule out a defective coil on the left side?

 

I think this is an oil-problem. Pistonrings or valveguides worn. So you have to strip the cylinderhead and find the problem. Regards from Switzerland

 

Yes, it does appear to be burning oil hence the blue smoke. Might be worth doing a compression test before stripping it down to see if there is a significant difference between cylinders.

 

Is the choke opening on the left carb. I never had choke sliders in on my 120V.

Take the choke sliders out. You don't need them. Just a good tickle and she should start perfectly.

Are the slow running jets set at 1 1/4 -1 1/2 turns out.

I had a "Gunson" colour tune years ago and you could set the slow running perfect with it.

Is the left needle in the correct position height wise.

Worst case. . . swap the carbs over and see what she runs like.

Inlet manifold may be cracked or bad gasket.

 

If it has electronic ignition the condensers should have been ditched?

 

Correct. I'm doing 3 things at once and just ran through my thoughts forgetting he had EI fitted.

So we're back to carbs. Inlet manifold may be cracked or bad gasket.

 

I would undertake a compression test first, however, given that you say it emits blue/grey smoke it is a strong indication of burning oil. It will need the head and barrels removing to inspect. Don't run it anymore, if a ring is broken it can cause further damage.