OK, now I'm not so happy.
Here's what I've done this afternoon trying to improve the misfiring right side cylinder -
1 Swapped plug leads left to right after fitting two new spark plugs. (Then swapped them back, wasted spark ignition).
2 Tried pilot mixture screw adjustment between 1 and 3 turns out. (I started off at 2 turns out).
3 Double checked air leaks and replaced a suspect vacuum connection blank.
4 Swapped diaphragm and needles left to right.
5 Tried choke in several partial positions.
All revs from tickover to 3000, still same misfiring. I can actually feel a pulse as it misfires if I touch the carb top while the engine is running.
None of that made the slightest difference to how it runs.
I don't think I've got any alternative now other than remove the carb set again and go through the air/fuel passages on the right side carb. I have a sinking feeling here that right at the start when I extracted the seized mixture screw, there's something there that I haven't yet noticed?
Edited to add - the mixture screws on CVK34 are a pain to get to on the bike. So I've just ordered a pair of mixture screws with an extended shank that has a knurled grip at the end. Makes adjustment of the mixture screws so much easier. Should have bought them before now.
Here's what I've done this afternoon trying to improve the misfiring right side cylinder -
1 Swapped plug leads left to right after fitting two new spark plugs. (Then swapped them back, wasted spark ignition).
2 Tried pilot mixture screw adjustment between 1 and 3 turns out. (I started off at 2 turns out).
3 Double checked air leaks and replaced a suspect vacuum connection blank.
4 Swapped diaphragm and needles left to right.
5 Tried choke in several partial positions.
All revs from tickover to 3000, still same misfiring. I can actually feel a pulse as it misfires if I touch the carb top while the engine is running.
None of that made the slightest difference to how it runs.
I don't think I've got any alternative now other than remove the carb set again and go through the air/fuel passages on the right side carb. I have a sinking feeling here that right at the start when I extracted the seized mixture screw, there's something there that I haven't yet noticed?
Edited to add - the mixture screws on CVK34 are a pain to get to on the bike. So I've just ordered a pair of mixture screws with an extended shank that has a knurled grip at the end. Makes adjustment of the mixture screws so much easier. Should have bought them before now.
Last edited: