To quote Ronald Reagan, "There you go again!"
Originally Posted by DennisDarrow
Talking about Dels, I gave up vacuum gauges, mercury sticks, water stacks and the like and simply went back to basics, as a member suggested couple years back. First very important that all air connections carb to cylinder head are air leak free. Any air leak will effect the mix. Cracked hoses and the like. I seal the cable to carb tops too with a wrap of silicone self sticking tape. Hopefully no air into mix except through the carb.
Next all jets and carb internals, stock as per manufacturer. figure that's what the engine guys came up with. Assuming valves are in adjustment, valves guides are good, rings are good, timing is spec, electrics are spec, valve seats are spec, and that's a lot to assume, move on to owner's manual.
Next check carb slides are exact same height check with the click method, check cables properly seated in their ends with no binding either end, this exact slide height is where the engine operates on the main jet over 3K rpm, same height?, very smooth. For idle adjustment start at owner's manual settings and as stated by others, I use the ear and hand since we don't don't idle down the road.
I think that we need to find someone who will sell expensive BMW Divining rods. Not only can they find underground water lines/streams, but they could double as carb adjustment tools. Just sit on the bike while it is running and the rod will "jiggle" on the side that the carb need the adjustment.
Sell them with a fancy name and people will buy them! Some people just can't resist buying something!
'92 R100GS '81 R100/t
That's just me![/QUOTE]