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2004 electric start, clonky box


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#1 lobofuego

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Posted 17 August 2013 - 04:37 PM

Ok then heres a piccy!
But now ,
how am i going to cure this clonky box, fine on the downshift in a clonky kinda way,
but really nowhere near as good as me dnepr!
Now i cant be the only one with this issue, and somewhere out there is my answer!
It really is too embarrasing,  sometimes i stop in second, cos it looks the nuts, and i know its just ego ...
but i am an engineer....and it has to be right!
Not stripped it yet! and am loath to do so with only 12k on it and no real faults apart from me...

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#2 dowey

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Posted 18 August 2013 - 07:41 AM

clunky is normal :))
2005 ural
1992 dnepr mt11
2015 ural

#3 David B.

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Posted 18 August 2013 - 03:24 PM

You can't compare the two.   Dnepr transmissions are WAY smoother that Ural transmissions.
David B.

Presently;  '07 Tourist

Previously;  '03 Tourist, '04 Patrol, '?? Mt16, '65 MV750

#4 lobofuego

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Posted 18 August 2013 - 03:39 PM

Ok chaps ..but clonky is never normal!! if the dnepr box is smoother there will be a reason, it maybe that i have to shim a shaft, or fit decent bearings etc, but there will be a solution! and i was rather hoping that some other enterprising soul may have decided to go this way and leave a trial for me to follow ,rather than having to blaze one myself!!
Ultimatly i suppose i will have to take it apart ,replace all he bearings shim it to a thou of its life ,and remove it all again cos its too stiff! whatever!
i will get it clonk free, as my earlier   Ural 650 was a lot smoother, so there must be a solution!
The only thing i could see would be a higher rotating mass due to larger bits as its a 750!!
But my head says thats not likely!!

#5 racepres

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Posted 20 August 2013 - 01:57 PM

Likely it is actually the clutch Not disengaging completely/smoothly.
But...Clunky is Clunky...
Ask anyone with a 4 speed Harley!!!
RP

#6 uraltourist

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Posted 21 August 2013 - 09:38 AM

Or any Airhead BMW.....They were made to a very high standard, they all clunked between gears, it is the nature of the beast....Just take it slow and don't stomp on the lever...

#7 lobofuego

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Posted 21 August 2013 - 02:07 PM

Harleys yep remember them...4 speed ones always seem to die, particularly here with the stop start, town rides most of them endured....
And Beemers clonky? never always as smooth as silk if rebuilt properly after the gearchange spring breaks through oil emulsification!!
Nope...This is really much clonkier than them...but have noticed its noisy when pulling up(rolling) with clutch disengaged, and i suspect this is a clue like you said!

#8 yves4640

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Posted 22 August 2013 - 12:19 AM

All BMW K75 and K100 have clonky gearbox, not only airhead BMW...

#9 dowey

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Posted 22 August 2013 - 03:22 AM

I always worried about the noise of my ural until i went to visit F2 motorcycles. I think it was because i had no frame of reference as there are no urals around where i live. At F2, David Angel started his own bike and i was pleasantly supprised to hear the same noises coming from his bike ...im no engineer but have had a few urals and a dnepr over the years and have found the urals clunky. Having said that, i am sure a competent engineer would be able to sort this ...i wish i had the ability and money to be able to do stuff like that :))
2005 ural
1992 dnepr mt11
2015 ural

#10 JPanyon

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Posted 22 August 2013 - 11:22 AM

I will happily take David at F2, or any other Uralista for a ride.  I'll use either my rig, or theirs (they make the choice, not me!), and then run the rig through the gears using 5,000 rpm shifts AND nary a clunk to be heard.  How?  Simply use the gear box as it was designed to be used, and double clutch each shift as though it were a truck (lorry) transmission.  Didn't anyone wonder why there's a false "neutral" between gear sets?  If you refuse to do this, then live with the clunks or use low rpm shifts (lugs the engine!) or stomp the shifter and hell with the consequences.  As for me, I like noiseless smooth shifts 'cause the voices in my head tell me so...all along a quarter million miles of biking with "clunker" gearboxes on BMW airheads and Ural 750's.  Happy Shifting To All... John Panyon

#11 dowey

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Posted 22 August 2013 - 01:03 PM

just to clarify ..it wasnt clunky gears i was writing about in my visit to f2 ..just general noise from the unit :))
2005 ural
1992 dnepr mt11
2015 ural

#12 dneprlover

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Posted 22 August 2013 - 01:33 PM

All bikes with engine speed clutches have ' clunky gearchanges' . Most noise is down to rider technique. Ural are probably the worst of the bunch but if you can improve the change without spending lots of money, I'm sure the Ural design engineers will adopt your ideas

#13 lobofuego

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Posted 25 August 2013 - 12:32 PM

I am sure they wouldnt not because they cant,
simply because any motor vehicle is a compromise ,
they are held accountable for costs and will shave a penny off here and there
thus  causing the difference in quality between the older Dneprs and the newer urals..
So yes i could an will make it better , and i was hoping that someone
would have said about crap primary shaft bearing quality, ...
But first i will go to the clutch as the most likely culprit....

#14 lobofuego

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Posted 01 September 2013 - 06:31 AM

And it was risky!!...so i experimented with the dnepr first!!
Whilst it was almost good it had its moments....
So not going to put it in engine ,because of the centrifugal filter .
But the box and final drive were just there..waiting!!
Soooo...the experiment began.....
I changed the oil again....
And then....wait for it...
Added a secret (and very rare these days...)
Small amount of ..Flake Graphite!
Yes folks a 1930,s fix...and guess what... its brilliant!
Added it to final drive as well, have had this 1lb tin for years now it is very fine, and as i havnt seen it for years would expect it to be rare,
Thus far , lovely smooth change, will try it in the Ural but am busy doing other bits to her ,
and want to do Clutch first anyway...

#15 Bill Kendall

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Posted 06 October 2013 - 06:13 PM

What weight or grade of flake graphite did you use




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