09 and older Cam bearing modification/upgrade

The "Pimp my Ride" section for Soviet bloc bikes. Everybody seems to have their own custom add-ons, modifications & accessories. Share your tips and post pictures of them here.
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This is the place for topics concerining modifying and accessorizing your Ural or Denpr.
gobium
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Re: 09 and older Cam bearing modification/upgrade

Post by gobium » Thu Aug 09, 2018 11:01 am

2010-19 cam end is 18mm not 22mm and cup is l
28mm
If you are using newer cam set up , you need to mill the case.
bearing not the same
The trick is not to mill the case

gobium
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Re: 09 and older Cam bearing modification/upgrade

Post by gobium » Thu Aug 09, 2018 11:10 am

In 2007 imwa upgraded ural head with tapered valve springs, no free mod!
In turn the energy tranfer from heavy duty springs and effect the bronze bushing.
In 2010 the upgraded cam end bearing to sks
Just guessing

gobium
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Re: 09 and older Cam bearing modification/upgrade

Post by gobium » Thu Aug 09, 2018 11:13 am

Here is Lutz milling pre 09 case.
Cheaper and easier not to mill case

wyowillys46
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Re: 09 and older Cam bearing modification/upgrade

Post by wyowillys46 » Thu Aug 09, 2018 12:41 pm

gobium wrote:
Thu Aug 09, 2018 11:00 am
wyowillys46 wrote:
Thu Aug 09, 2018 10:58 am
Im guessing the factory is grinding the end to the smaller diameter (vice the larger diameter on the old ones) on the new style, then heat treating. Not trying to down play the positives of your mod. I’m planning on it on my M72. Just saying the brinelling is a good possibility.
Cam is heat treated, it is hard to turn
That’s good to hear. That’d be a wtf moment if it wasn’t from the factory.
Morgan

'06 Gear-Up
195? M72/K750 hybrid

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VWK75S
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Re: 09 and older Cam bearing modification/upgrade

Post by VWK75S » Fri Aug 10, 2018 5:50 am

gobium wrote:
Thu Aug 09, 2018 10:25 am
VWK75S wrote:
Thu Aug 09, 2018 10:01 am
Van,
Interesting, always wondered how you know when to replace it?
John
Bronze cup will wear after 60000km, looseness with effect timming
So 140,000kms is a bit much? :?
John
The Ural's made Maine a much bigger state.

2009 GearUp 140,000kms
2007 Retro 20,000kms
1991 VWK75S 110,000miles

GregAus
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Re: 09 and older Cam bearing modification/upgrade

Post by GregAus » Sat Aug 11, 2018 9:39 pm

All is explained in the video in this post viewtopic.php?f=12&t=48437&p=624772&hil ... ft#p624772

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