Dynatek kit has arrived and looks straightforward to fit. I have also decided to renew the springs on the advance mechanism for thoroughness sake.
I am also the new owner of a curious carburettor balancing instrument based on looped plastic tubing and ball bearings.
My weekend is mapped out for me! CylvaBirch2013-03-16 08:21:13
Well in Leicester its certainly not riding weather at the moment its pissing it down so a good session in the garage for you sounds a better option than riding good luck with the job and hope you dont rip the stupid paper base gasket
Getting fed up now! Fitted Dynatek and set it up cock-on for timing. Bike started instantly and ran a little bit quick on tick over but no worries. I dropped the enricheners back down and she stumbled a bit but kept going with the generator light glowing a bit. After a minute or so she suddenly seemed to lose power. I applied a bit of throttle to speed her up a bit but she was reluctant to rev. I applied a bit more and got an almighty back-fire that must have alarmed the neighbours (it alarmed me!). She then picked up and was revving happily but then the same sudden reluctance followed by a back-fire. I took off the right side plug lead and there was no difference so she was only running on the left. If I took the left side off it killed her instantly. Have I got a duff coil on the right side? Anyone who can help is welcome to take a look. I have beer here.
Miserably,
David.
Buddy sounds like you may have a duff coil but swap them over and check if the fault swaps sides.
can send you a pair of coils to fit on test to see if it cures the problem
I will try the swap tomorrow. The coils look an absolute bar-steward to remove. Is there a trick to it?
David.
If it is of any help with the diagnostics, when she backfires I get a big plume of soot out of the exhausts.
sometimes with electronic ign there is a āwasted sparkā so it fires every time ā¦so if there is fuel in the system or you flick the ign off/on you get a backfireā¦
It is very difficult to diagnose on line, but for ign problem I would
- swap coils over
if the problem goes away it is duff connection
if it stays the same it is timing or the Lo tension pulse not getting to the coils
if it swaps sides it is either lo T OR the coil.
Check that first as to swap coils it is only a matter of swapping over the Lo Tension feeds.
Similarly IF you think it is fuelling swap the carbs left to right ā¦ more likely to be electrical tho
IF no results there then it is time to check timing and compression. IF all the above does not reveal the problem it is time to take the head off and check the actual valvesā¦but that is the last thing you wanna be doing.guzzibear2013-03-17 15:03:45
This is caused by RH not firing so silencer fills with unburnt fuel, when it does fire KABOOM + black soot
PS: I just went back to the original post, itās still got the same problem, Dynatec didnāt cure it.
At risk of mentioning the obvious - been back over the thread again, couple of times peeps have mentioned plugs or HT leads being possible problem, but you havenāt said whether you tried new plugs and/or leads, or swapped the plugs over as a test. Could still be really really simple, you got a duff plug, duff plug cap or HT lead shorting to earth. Need good spares to swap in to try these out. Also if the coils are as per originals, need to make sure each HT lead is fully inserted properly, they can āfall outā. HTH
A bit more news to my devoted friends:
I dug out my old strobe light this morning and hooked the inductive pick-up round the RH HT lead.
Started the bike, first go as always and checked the timing on the flywheel marks. It was just about on the retarded mark. When I revved the engine it went to the advanced mark and then as I revved it more it went beyond the advanced mark. I did not think it was supposed to do that. I put new springs in yesterday ( a difficult job I thought) so was rather surprised.
Anyway as she warmed up my strobe light stopped working showing I had no spark on the right hand side. Bike just about kept going on the left bank alone.
Had to go to my grandsonās first birthday party so had to stop at that point.
Looks like the ignition system is failing to deliver a spark when the engine has run for a few minutes. This ties up with what happened on the road and previously in the garage.
Mike you are right, Dynatek has made no difference! I will try to swap over the coils to see if the problem transfers to the left side. I think I just need to swap over the green and red LT feeds to the coils and swap the plug leads over?
All HT leads are brand new as are the plugs. I suppose one of the HT leads could be a poor fit in the coil but I understood that they screwed in onto a spike?
Any more thoughts are very welcome.
Reading that to me it sounds more like a coil, when old or āgoingā they stert to fail as they get hot. THAT is where I would look buddy. Do not do anything else but swap the coils over THAT way you should see the fault swap sides if soā¦new coils.
\
Gutsibits have them
Also here http://www.feked.com/electrical/ignition-system/ignition-coil.html#1
guzzibear2013-03-17 19:55:39
I think so.
All HT leads are brand new as are the plugs. I suppose one of the HT leads could be a poor fit in the coil but I understood that they screwed in onto a spike?
Any more thoughts are very welcome.
Well Marelliās originals are just a pointed spike, cable is just held in by a grommet and a screw-down cap. Alternatives may well be threaded. Plus, I have had a brand-new-out-of-the-box spark plug not work.
Anyway we now definitely know itās not firing RH side after a few minutes.
Yep, we really do know that. Paul at Corsa Italiana has advised to remove both coils together as a set and not do them individually on the bike.
Just need to get some new coils now. Paul has them at about ĆĀ£18 plus vat each. I have decided to replace both while I have them out. I will get the appropriate end fittings for the HT leads to match.
All the best,
David.
Paul really knows his stuff
New coils are now standing in pride of place on our coffee table. I will venture into the freezing garage tomorrow and try to fit them.
All the best,
David
preparing for Arctic expedition ā¦
New coils installed and wiring tidied up. Tank goes back on tomorrow and then the moment of truth!