Valve adjustment issue

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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Bendog02760
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Valve adjustment issue

Post by Bendog02760 » Sun Nov 17, 2019 1:22 pm

Replacing valve cover gasket so I decided to do a quick check of my valve clearance. The issue I ran into is one of the locknuts is weak (semi stripped). As I tried to tighten down the adjusting screw locknut I was unable to. I switched out that locknut and had no issue so my worry it was the adjusting screw is diminished. I think I just need an m8-1 nut but is there and specific grade, should I order from Ural NE or can I just grab from a hardware store?
Current Rides:
2012 GU (I bought in May 2017) All my GU rides are with my dog, Liberty
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HD Wide Glide
Owned about 15 other HD over years
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Lofty
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Re: Valve adjustment issue

Post by Lofty » Sun Nov 17, 2019 5:55 pm

Like the Ural, my Suzuki also uses screw and locknut adjusters for the valves. I can confirm that, on the latter, the nuts are hardened and the adjusters are an uncommon thread pitch (.75).

In the same circumstance as yours, Bendog, I'd seek out OEM replacements. Just a thought.
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Re: Valve adjustment issue

Post by chaos2 » Sun Nov 17, 2019 8:37 pm

I had the same issue with my Triumph Spitfire. Out of desperation I discovered the transmission bellhousing was attached to the engine block with the same size nut as the adjuster, and there were lots of them, the bellhousing wouldn't miss just one. I did the dirty deed, drove the car another 10 years and never thought about it until now
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Bendog02760
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Re: Valve adjustment issue

Post by Bendog02760 » Sun Nov 17, 2019 9:13 pm

Lofty wrote:
Sun Nov 17, 2019 5:55 pm

In the same circumstance as yours, Bendog, I'd seek out OEM replacements. Just a thought.
I’m going to follow your advice, thanks for the info. :cheers:
Current Rides:
2012 GU (I bought in May 2017) All my GU rides are with my dog, Liberty
HD Road King
HD Wide Glide
Owned about 15 other HD over years
Boston Mass.

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Lofty
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Re: Valve adjustment issue

Post by Lofty » Sun Nov 17, 2019 9:21 pm

:thumbsup:
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Re: Valve adjustment issue

Post by Snakeoil » Mon Nov 18, 2019 2:23 pm

If I am reading the parts diagram correctly, the jam nut for the valve lash adjuster (Ural calls it an adjusting bolt) is part 17 on the diagram. The parts list says it is a M8-1, which is a standard fine thread nut.
https://uralofholopaw.com/cylinder-and- ... heads.html

You can get them in Class 10 (hard) from Fastenal. I would think you have a Fastenal facility in Beantown.

https://www.fastenal.com/product/fasten ... lyId=30629
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Re: Valve adjustment issue

Post by Claus » Mon Nov 18, 2019 2:42 pm

Rob is right. M8x1 class 10 would be right. Don´t know the newish Ural enough, on older models it had a 12mm wrench needed (where normally a M 8 would need 13mm) but that´s not a problem.
What I would check is if the screw´s thread is still ok (can you drive it through the whole length easy?) If not, I would replace it with a oem part including the nut. And I would cut it and not drive the bad part of the threat through the rocker
owned bikes: 93 Ural rig domestic model, 95 Suzuki DR 650 RSE, BMW R100GS, Suzuki GSX1100G rig, BMW R100R rig with Ural sidecar, Ural rig with BMW drivetrain under construction,

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Re: Valve adjustment issue

Post by RC20 » Mon Nov 18, 2019 2:58 pm

Pretty much what Claus says.

I would conciser for nus and other fasteners the best Fastenal has. They rate out metric wise as a Grade 8 and there is a grade 8+.

The grad 8+ capscrew have a thicker head which can be a real plus and a knuckle buster avoidance strategy. I have replaced a number of fasteners on the Ural so far. I lot seems to be Grade 5 and that is a bit iffy (exterior, hope not to fine out in the engine)

The steering damper head end are replaced and the hardware on the wheels. I still use the lower torque from Ural or my calcs as the base is aluminum in some cases.

At work we just ran that grade 8+ stuff, jerks decided to save money and got crap fasteners that some had no rating on them (its against the law).

Cheap and stupid SOBs. We used all of maybe $1500 a year in fasteners and you never knew what application. I had to order the good stuff for my critical work after that. So, my time and shipping and they saved what?
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Re: Valve adjustment issue

Post by Bendog02760 » Mon Nov 18, 2019 9:44 pm

Thanks Gents, I’ll hit Fastenal up. I called UralNE before reading this and they did say to get them local as they are not special application. If you are going to run into an issue invariably it’s always the sidecar side. :feelsgood: It was the inlet valve that I could not lock down after setting it and since I hadn’t adjusted the exhaust valve I used that nut to lock down the inlet. So now I’m just looking for #8
Nut М8х1-6Н
DIN 934 M8x1



Looking at the parts diagram I just wasn’t sure how specific the hardware was or if it needed to be a specific engine grade.

I received my new valve cover gaskets today and will locate the hardware tomorrow. Thank you! :cheers:
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Current Rides:
2012 GU (I bought in May 2017) All my GU rides are with my dog, Liberty
HD Road King
HD Wide Glide
Owned about 15 other HD over years
Boston Mass.

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Re: Valve adjustment issue

Post by Snakeoil » Tue Nov 19, 2019 9:07 pm

Metric hardness ratings are different than SAE. Class 8.8 in metric is roughly Gr 5 in SAE. Class 10.9 is similar to Gr 8. And there is a Class 12.9 in metric that is even stronger.
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Re: Valve adjustment issue

Post by Bendog02760 » Tue Nov 19, 2019 9:56 pm

Thanks for the education, when I initially posted the question I thought it was a borderline stupid or simple question. I knew a few things like thread pitch but definitely have learned a lot. Tomorrow I’ll ride! :cheers:
Current Rides:
2012 GU (I bought in May 2017) All my GU rides are with my dog, Liberty
HD Road King
HD Wide Glide
Owned about 15 other HD over years
Boston Mass.

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Re: Valve adjustment issue

Post by Claus » Wed Nov 20, 2019 4:01 am

Snakeoil wrote:
Tue Nov 19, 2019 9:07 pm
Metric hardness ratings are different than SAE. Class 8.8 in metric is roughly Gr 5 in SAE. Class 10.9 is similar to Gr 8. And there is a Class 12.9 in metric that is even stronger.
Correct. Where these ratings are only for the metric screws and bolts. The nuts have to correspondent. So a nut for a 8.8 bolt is stamped with an 8, a nut for a 10.9 bolt is stamped with a 10.
Different to SAE it´s not allowed to galvanize very strong bolts like 12.9 because of potential Hydrogen embrittlement. They come burnished.
owned bikes: 93 Ural rig domestic model, 95 Suzuki DR 650 RSE, BMW R100GS, Suzuki GSX1100G rig, BMW R100R rig with Ural sidecar, Ural rig with BMW drivetrain under construction,

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Re: Valve adjustment issue

Post by scottmastrocinque » Wed Nov 20, 2019 9:15 am

Okay, my 2 cent worth.

I just had this issue last week! Ivan at the factory, TORQUED the right had side intake valve adjustment nut to about a million foot pounds. When I put my high-quality wrench on it to loosen it, it just rounded the edges of the cheap quality Chinese nut! I had to heat it with a torch to make it come loose! It was crazyass way over tightened!

I went to my favorite motorcycle hardware store, (Lowes :D ) and bought a replacement 8 x 1 metric nut from their lovely speciality nuts and bolts boxes. I think it was 8.8 grade but it really doesn't matter guys! NOT ONE BIT!

It's holding the adjustment screw for the rocker arm gap. A whopping 3-5 ft/lb of torque (I don't use a torque wrench for this, I use wrench feel in my hand and you should too!) is all that is necessary to keep it in place. Nothing more.

8.8 grade bolts and nuts this size are rated for ~ 84,000 psi and last time I checked, 84,000 psi is WAY BIGGER than 3-5 ft/lb.

It doesn't even need to worry about corrosion as it's bathed in oil and oil vapor up there under the rocker cover!

Save your money. No need whatsoever for a OEM nut. Not one bit.

Here’s my rounded off nut (L) and the replacement (R).
IMG_0943.jpg
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Last edited by scottmastrocinque on Sat Nov 23, 2019 11:35 am, edited 1 time in total.
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Re: Valve adjustment issue

Post by on2wheels52 » Wed Nov 20, 2019 9:33 am

I think Scott and I took the same class :cheers:
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Re: Valve adjustment issue

Post by Bendog02760 » Wed Nov 20, 2019 5:44 pm

Thanks for the input everyone. :cheers: ..the only issue I had at a local Lowe’s/Home depot was finding the fine thread, same thing at my local Fastenal store, only stocked course. I ordered online yesterday and got the nuts today. It’s all buttoned back up. I agree about torque, although I have a good Snapon torque wrench I can’t say I use it much on the GU (except headbolts and final drive so far). I have a significant ride over the next few days and we enjoyed a little rainy ride today. :moto:
Current Rides:
2012 GU (I bought in May 2017) All my GU rides are with my dog, Liberty
HD Road King
HD Wide Glide
Owned about 15 other HD over years
Boston Mass.

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