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Dnepr ignition timing


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#1 jim.mt10

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Posted 26 September 2017 - 08:37 AM

Hi, there.
   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.
   Ride safe
    Jim

#2 racepres

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Posted 27 September 2017 - 07:23 AM

Or..
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...

#3 Russ Noe

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Posted 27 September 2017 - 10:06 AM

It is a good idea to check the gear timing. There is no guarantee it was assembled correctly.
I have seen worse!
~RN

#4 jim.mt10

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Posted 27 September 2017 - 01:03 PM

Thanks for the replies.
  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.
   Thanks again
  Ride safe
   Jim

#5 racepres

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Posted 27 September 2017 - 09:07 PM

I have my doubts a heat range change in plugs will have any effect on fouling in a mile or two!!!
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.

#6 jim.mt10

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Posted 28 September 2017 - 04:13 AM

Hi, racepres
   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.


#7 racepres

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Posted 29 September 2017 - 07:47 AM

Sure don't sound like timing..especially if it starts OK.
plugged air filter?
I would run with air cleaner in place, except without Filter installed... just to "see"

#8 jim.mt10

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Posted 29 September 2017 - 10:44 AM

Dead right, racepres!
  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
   Ride safe
   Jim

#9 Russ Noe

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Posted 30 September 2017 - 09:45 AM

Good to hear.
I have to remind myself to always look at the simplest possible solution with these machines.
Worked in your case too.
~RN

#10 racepres

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Posted 30 September 2017 - 11:21 AM

With the Crap we get instead of Gasoline here...I ave Never gotten rid of "dark" plugs...Just don't need to be "sooty"
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...

#11 dowey

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Posted 18 October 2017 - 08:19 AM

stick some diesel in :)
2005 ural
1992 dnepr mt11
2015 ural

#12 jim.mt10

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Posted 19 October 2017 - 03:18 AM

Bout ye mucker
  I had a hangover that day....that's my excuse anyway!

#13 dowey

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Posted 20 October 2017 - 12:24 PM

hahaha ..hope ya got sorted with the timin mucker ..mind when i got my mt11 it had the wrong plugs on it. It ran but rough as like. Also, after i got that sorted i ended up puttin one of those wee black boxes on that sent a micro volt to the points instead of the full wack ..didn't have to look at them again after.
Hope alls well with ya :)
2005 ural
1992 dnepr mt11
2015 ural




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