Good Day , I am synching the Bings on my 1980 R100RT.
Using my new 'TwinMax' balancer
all is going well, I went carefully through the Snobum procedure and I have the engine idling nicely at around 900 it sounds sweet and the gauge is spot on zero even when I turn up the sensitivity .
Okay here is the bit I DONT like.
When I go under the carbs to set the idle mix the RIGHT hand carb behaves perfectly, starting from one turn out from a soft closed position I slowly wind the screw in until the revs start to drop off , note the position and then wind the screw out again the revs pick up and then start to drop off again , so I set the screw mid way between these two points. Fine .
NOW on the left hand carb when I try to do the same thing I am finding that the revs increase as I wind the screw in!
not much now but the fastest idle certainly seems to be when the screw is set right home.
I watched a video tutorial of Chris Harris synching the carbs on a 75/6 and he had exactly the same issue
he did not go into the problem but said he was not happy with the carb.
Now, I re-built these carbs with Bing kits so it is very likely that I have put something in upside down or back to front.
Plagued by self doubt , anyone have any helpful comments, very much obliged