hi peeps,
one of my wifes bikes (1998 suzuki bandit gsf1200) has had a bad running issue for a while now which has now got to the point of not even starting or running now.
i have only had my picoscope for 2 days and am really in at the deep-end!
previously we compression tested, valve clearences checked, new plugs, carbs stripped & cleaned - and new coils fitted (old ones from this bike fitted to another bike which ran perfectly - swapped back and same issues)
here is a trace i ran on the coils this morning - i can see that there is a problem, i just dont know how to read the traces - please could someone point out to me whats causing what?
(btw - the coils are wasted spark types, one coil for pots 1+4 & one coil for pots 2&3)
I'm no bike guru but you can't really diagnose an ignition problem by just the primary & secondary.
Can you take another capture using the amps clamp too so we can see the coil current ramp with primary & if you have another channel the secondary too ?
Put some more time on the screen to see more than one event & sample at an interval of 1µs.
Setting aside the pico files for a moment. You have pretty much covered all potential problems, excepting ignition control unit, and back pressure problems in the exhaust.
Are you actually getting a spark at the plugs? Take it you've changed plugs too?
Doubt you bike will have a camshaft position sensor - given it has got carbs not FI.
i am getting a weak spark - it only seems to be firing on one pot (no. 2), its the only downpipe that gets warm - the others are stone cold - which is very odd as i would of expected 2 pots to be trying to fire at least
its has new plugs and theres no backfiring
Do you have a schematic of the system ? post it up let's have a look.
I missed you saying you had cleaned the carbs so ignore the CMP & grab coil current/primary/secondary/CKP, I don't suppose you have an adjustable spark tester ?