what do you see?

Are ya having a problem with your rig? We'll try to help. Share your tech tips and experiences here. Dr. Billy Glaser, author of the "Unofficial 750 Ural Service Manual" site myural.com, is moderating this section.
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Here is the place for you to ask questions about or share your experiences about servicing or repairing your Ural or Dnepr. Please post topics concering modifications or accesories in the "Modifications and Acessories" section. Please post oil related questions in the "Oil Threads" section.
gobium
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what do you see?

Post by gobium » Thu Oct 12, 2017 11:00 am

FB_IMG_1507820353979.jpg
FB_IMG_1507820365794.jpg
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Wildhorse Cafe
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Re: what do you see?

Post by Wildhorse Cafe » Thu Oct 12, 2017 11:25 am

Steam punk.
2011 Patrol Higgs Bison Super Collider formally known as the Orange and Silver Pumpkin Coach
2006 Shinny Black, Tourist, Tatyanna

When you set out on your journey to Ithaca
pray the road is long , full of adventure, full of knowledge
not expecting that Ithaca will offer you riches
Ithaca has given you the beautiful voyage

C.P. Cavafy

gobium
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Re: what do you see?

Post by gobium » Thu Oct 12, 2017 11:26 am

FB_IMG_1507820719696.jpg
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hotflash44
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Re: what do you see?

Post by hotflash44 » Thu Oct 12, 2017 11:44 am

no donut!
2016 gear up asphalt grey, name Seryy Medved ,Air America CIA circa 1967/8 Vung Tau Viet Nam USS Tutuila ARG-4 (AND JUST A TOUCH OF AGENT ORANGE!)

gobium
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Re: what do you see?

Post by gobium » Thu Oct 12, 2017 11:45 am

hotflash44 wrote:no donut!
Go look at some early bmw

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chaos2
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Re: what do you see?

Post by chaos2 » Thu Oct 12, 2017 11:57 am

is that a Dnepr airbox?
past afflictions include TR motocars and bikes, R60/2 & a R65, MGs, and a Citroen.
Now a 2012 FF GU and an 87 K75s
dual K&N cones on PVC intake, 40/137.5
Raceway needles
Modtop exhaust
$29 VW Hydraulic steering dampener

gobium
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Re: what do you see?

Post by gobium » Thu Oct 12, 2017 11:58 am

chaos2 wrote:is that a Dnepr airbox?
May be gb too!

GregAus
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Re: what do you see?

Post by GregAus » Thu Oct 12, 2017 5:07 pm

System used on prototype M-73
wHcx1xJDdW0.jpg
ga_1DrbaWGA.jpg
6vHjfBKFyNM.jpg
4niz14-FaZ8.jpg
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gobium
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Re: what do you see?

Post by gobium » Thu Oct 12, 2017 5:09 pm

GregAus wrote:System used on prototype M-73
wHcx1xJDdW0.jpg
ga_1DrbaWGA.jpg
6vHjfBKFyNM.jpg
4niz14-FaZ8.jpg
Hey thanks for post that

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Re: what do you see?

Post by gobium » Thu Oct 12, 2017 5:14 pm

Fr my frieng Oliver G
Looks like the drive shaft out from Vojager, Cobra and Wolf until end of 2005
no damping element, only russian iron
end of 2005 a new spring loaded drive shaft came for Wolf until end of production

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Re: what do you see?

Post by GregAus » Thu Oct 12, 2017 6:31 pm

You're welcome gobium. The M-73 was a brilliant design - 750cc, 50 PS, 130 km/h, proportionally linked rear and sidecar brakes, single plate sprung hub clutch, twin row chain drive camshaft, electric starter, optional 2WD, crankshaft mounted alternator, engine mounted on silentblocks, flywheel mounted by four bolts, five speed gearbox with reverse - the list goes on. And all this in 1980! Look at this aftermarket BMW driveshaft damper from the late 2000s early 2010s.
TRA00012A.jpg
What could've been
EbOfkb3Sepo.jpg
fm_Eq1z43oY.jpg
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Lmo
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Re: what do you see?

Post by Lmo » Thu Oct 12, 2017 8:40 pm

What could've been

well, that kinda sucks, huh?
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Snakeoil
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Re: what do you see?

Post by Snakeoil » Thu Oct 12, 2017 9:31 pm

I wonder what the cost differtial is between the prototype and what they use today. I have to believe that the donut design is much cheaper.
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ichbinbier
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Re: what do you see?

Post by ichbinbier » Thu Oct 12, 2017 10:50 pm

gobium wrote:
FB_IMG_1507820719696.jpg
Just curious Van, why did you go with the universal instead of a constant velocity?
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Re: what do you see?

Post by GregAus » Fri Oct 13, 2017 4:37 am

Snakeoil wrote:I wonder what the cost differtial is between the prototype and what they use today. I have to believe that the donut design is much cheaper.
If everything had gone to plan then the M-73 would have been much cheaper than the current models. For a start it was designed for production of 200,000 units a year, not 1,500. Yes Hardy couplings are cheaper than the M-73 design but don't work as well and seem to fail far too often. A chain driven camshaft is far cheaper than the multiple gear sets needed for crankcase variations. Machining tapers on the crankshaft and flywheel and threads for a big bolt is for more expensive than machine four small bolt holes. Much simpler alternator set-up with a pathway for easy upgrades. The cost of machining the splines for the over-complicated clutch set-up now used?

IMZ's problem is that it is directed by IMWA, and IMWA's management has no real knowledge of motorcycles and engineering and what went before. It consistently re-invents the wheel and seems to think that triangular and square wheels are look better than round wheels. Just look at the current clutch for proof of that.

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