Dnepr ignition timing
Posted 26 September 2017 - 08:37 AM
This topic has been covered before but when I have searched for it, I am not
finding the exact answer.
I have been trying to tune my rebuilt MT10/36 and have installed the Russian electronic
ignition. (with the LED)
The problem is it sooting up the plugs and running rough at idle. I was blaming the carbs
but now I feel it is an ignition problem. I advanced the ignition as far as it would go and this
improved the running at idle,and I could see the "full advance" mark on the flywheel when
I revved the engine (to about 3000 RPM I guess) but it still wasn't right so now I have
made the slots in the timing plate longer to allow more advance, this has caused a great
improvement but I am now seeing the "full advance" mark at TICKOVER and I am
wondering is this too far advanced as to damage the motor?
Another thought was that I only did a top-end rebuild (new pistons and cylinders) and did not
do anything to the timing gears so now I wonder if a previous owner moved the timing
by 1 or 2 teeth would I be seeing these problems or is it normal to see "full advance"
in the timing window at Tickover or would the engine not run completely in this case?
Sorry for the long question.
Posted 27 September 2017 - 07:23 AM
I never do Cylinders without doing Valves!!!
I ended up setting my MT-11 By Hand/Ear. Not the best idea for most, but for me, it worked out real well.. No "knock" , pulls Strong, starts in one kick!!!
One day I will check to see where it is at!!!! As I may want to do it again...
Posted 27 September 2017 - 10:06 AM
I have seen worse!
Posted 27 September 2017 - 01:03 PM
Yes, Russ, checking the timing will be the next step, I was just wondering would
the bike run at all with the timing gears misassembled? It does run, it's just
fouling plugs sfter 2 or 3 miles and showing the full advance mark at tickover with a strobe.
I have ordered the next hotter plugs to give that a try I'm using BP7HS and will try BP6HS.
Posted 27 September 2017 - 09:07 PM
Gotta get much closer than that...
is the "fouling" fuel? or Oil? Or just Black soot?? Wet or Dry?
Start it, then shut the fuel off and run till it dies....Look at plugs.
Posted 28 September 2017 - 04:13 AM
Yes, it is dry black soot. I am going to give it a run with airfilter open today
if I get the chance. Then have a look behind the front cover.
Posted 29 September 2017 - 07:47 AM
plugged air filter?
I would run with air cleaner in place, except without Filter installed... just to "see"
Posted 29 September 2017 - 10:44 AM
Took a 10 km run today with 'birds nest' removed from air filter,but with paper filter in place
and the bike ran better than ever. LHS plug still a bit dark but getting there.
I will probably run it without the mess of nylon, might try a wire wool cleaning pad sprayed with WD40 and lean out the carbs
but feel I am getting close.
I am pretty sure the timing gears are ok, the full advance mark is still in the window at quite low
revs ( tickover) but I'll keep messing with the carbs.
Thanks for your replies
Posted 30 September 2017 - 09:45 AM
I have to remind myself to always look at the simplest possible solution with these machines.
Worked in your case too.
Posted 30 September 2017 - 11:21 AM
If it one lungs occasionally..just remove the Plug wires till they "jump" the spark to the plug...it will clear right up..assuming all else is OK...
Posted 18 October 2017 - 08:19 AM
1992 dnepr mt11
Posted 19 October 2017 - 03:18 AM
I had a hangover that day....that's my excuse anyway!
Posted 20 October 2017 - 12:24 PM
Hope alls well with ya :)
1992 dnepr mt11
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