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Yep done that,and timing looks pretty close (thing is with the pick up plate it doesn't make sense for one side to time correctly and not the other).....need to borrow a strobe light I think (hadn't used mine for 20 odd years and now it doesn't work).
Not so, it might be possible to move the plate enough to get one cylinder to be spot on, the other of course would be miles out, Besides it's more likely than a cam worn away to a point it will not fire.I think the next step is to put each cylinder in firing position and see if the ignition lobe lines up with the timing sensor.Sent from my shoe phone!
Well , the OP never said the offending cylinder was not firing . From my experience it is hard to move any timing plate enough to compensate for 90 degrees of timing woogity . Maybe 20 degrees is possible . Once again , if I am missing something , apologies . Does anyone know for sure about this ignition system ? Dusty
No, I think he said it was backfiring, this made me wonder if it was sparking with a valve open.Remember it was bought as a non runner so who knows what the previous owner did to it.I'm sure we will know soon.
If it is a Motoplat, I'm clueless. I''m 99% sure that a Digiplex wouldn't do this.
Does the digiplex use one trigger with two pick up points ? Dusty
It is the earliest of the computerized ignitions. Has a flywheel position sensor, and uses vacuum for advance.
Once again Chuck makes the most pertinent query for the most probable suspect. ;-T92 V75. I'm guessing it is a faired Strada. Do you have a couple of modules like this, probably under the seat?If so you have the motoplat system. Quite sensitive to poor earths. Clean and check ALL connections. If that doesn't work then swap over the modules and see what happens. You're lucky. I normally don't help Triumph people. :P
Would it be possile to put the flywheel in the weong spot in relation to the crank thus throwing the sensor target out of position?
I would think so. It's one of the reasons I asked what kind of ignition it uses. I'm totally clueless (my normal condition) ;D about the Motoplat, though.I don't even know how it's triggered. I'll look in Guzziology for some clues. I'd still like to see some compression figures, along with assurance that it is sparking at the *right* time. Just some basic things.
Has anyone mentioned that this might be a leaky *Thrunge grommet* , or a bad *dust excluder* , OK , yeah , you're right , going to my corner now :-[ OK , so this is an Eyetalian model , what kind of ignition system does it have ? If both sides are sparking , is it even possible that only one side is in time ? OP swapped components side to side , no change , which still leads me to believe this is a valve lift or timing issue . Dusty
Its a Kettering system still so any disruption to the current to the coil will generate a spark but not when you want it. This can be on the +ve or -ve side. As the power to the coils is usually in parallel and one side is working fine then this is unlikely but a dodgy connector/ion to the coil can still cause this. This does remind me to ask: Does this model have an electronic or mechanical tacho? If electronic does it wave around when misfiring? May be a case of the tail wagging the dog. The modules control the advance on a 'plat. They do this by controlling the earth circuit from the coils which is why good connections to earth are essential.
Hello again. Took me a while to sort out how to work instagram....but this is a pic of the EI pickuphttp://instagram.com/simonj6160/
Only just got back to this (bike at the back of the shed while I get on with some other stuff) The rotor has no movement, so not a mechanical advance and there's also no vacuum advance. My understanding is that the advance is controlled by the two ignition boxes. The thing that has struck me though is that the pick up plate and screws look an awful lot newer than the surrounding area......Recently fitted perhaps?I'll have another bash at it as soon as I can lay my hands on a strobe......should give me an idea what's happening (or not happening ???) Thanks for the constant input chaps :bow