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Your Norton as noisy?

Modern 961 Norton Commando Motorcycles

Re: Your Norton as noisy?

Postby TonyA » Wed Jan 18, 2017 6:54 am

Hello Richard , That's good to know. Then a check of oil pressure might be in order. It is non-invasive , Just remove oil pressure sending unit and screw in a pressure gauge ? Start the motor and check cold and warm . Check the results with the manual. Thanks for your reply. Tony

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Re: Your Norton as noisy?

Postby BritTwit » Wed Jan 18, 2017 8:49 am

Richard,

The balance spring that you refer to, is this the backlash spring in the balancer shaft gear?
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Re: Your Norton as noisy?

Postby richard-7 » Wed Jan 18, 2017 10:04 am

Good idea Tony.

Yes. Thats the spring I'm talking about. We have a tool for setting that at CNW. You will just need to get a new spring as once its over stretched, it no longer works.
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Re: Your Norton as noisy?

Postby richard-7 » Wed Jan 18, 2017 10:05 am

Easy and free is setting timing chain tension. Made my bike quieter.
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Re: Your Norton as noisy?

Postby GKRyder » Wed Jan 18, 2017 4:34 pm

OK
I'm gonna do it.

- check oil pressure
- check spring
- set timing chain tension


Thanks gents.

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Re: Your Norton as noisy?

Postby richard-7 » Thu Jan 19, 2017 9:35 am

The only way to check the spring is by taking it apart which requires no special tools. However, re-assembling does require special tools. So unfort. you cannot check without re-setting the tension. CNW has a ONE07 tool to do this. I would start with the free stuff first and see what happens. If it's not that, then purchase the tool and a new spring and go to town. The spring is seen on the CNW website. Its just a laser cut or waterjet spring, but if you over tension it, which is what was happening for a while there at UK factory, the spring is garbage and the engine is noisy. Over tensioning that spring is easily done. If you can live with clacking noise, that spring can be changed never or one day at your convenience. It wont harm the engine being sloppy. BUT>>> if it's the RING GEAR, thats a whole different story. And the real only way to check is by removing the clutch basket. >>See my manual on that.

SO>>> Be warned!!! When you go to replace the spring, be in a good mood with lots of patience :mrgreen: :mrgreen: :mrgreen: It's an easy job, just need some dexterity to set that spring tension and not go past a tooth.
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Re: Your Norton as noisy?

Postby bushman » Thu Aug 03, 2017 9:58 am

What are the next steps in trying to deal with a noisy engine?

I have done the following
- replaced split gear spring (original was 1mm over stretch)
- tightened timing chain
- 20-50 Liqui-Moli oil in primary

I have yet to check the valve clearances.

Riding home last night I really felt that the engine noise is still not acceptable - the clacking and thrashing up to 3500rpm is very concerning. Under acceleration from 4000-5500rpm there is another set of rattling sounds like the engine is going to detonate.

Bike had done 1500miles when I got it in May, its a 2013 CR. I have done 1400miles on it.

I have no issues with the fueling, original map I believe. I run 94 ethanol free gas.
I have done a de-cat.
No issues with the air box filling with oil, no modifications made on that, still original.

So here is a question for the FACTORY and the group...... what should I do?
Dealer network in Western Canada is pretty thin.
Anywhere I can send my engine?
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Re: Your Norton as noisy?

Postby Fast Eddie » Thu Aug 03, 2017 11:45 am

You've got one of the best places to take your bike, or engine, in Canada with Richard and his Dad!
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Re: Your Norton as noisy?

Postby richard-7 » Thu Aug 03, 2017 1:48 pm

Message me and I'll give you the number. Or contact Peter Howes and ask him for Daves number.
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Re: Your Norton as noisy?

Postby GKRyder » Thu Aug 03, 2017 2:44 pm

I guess you guys will find out if it's the clutch side as well.

Same symptoms with mine under load like heavy metal on metal sound.
It was my clutch basket being loose (moving on its rivets).

I also checked and changed the split gear ring.
Biiiig difference now and am thinking of going heavier on oil from 10w40 for icing the cake.

Hang in there...a quieter Motor made all the difference for me.

One question: Is it considerably better when could at idle? (When oil is thicker?). Mine sounded better as soon as warmer after few minutes it sounded very bad indeed

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Re: Your Norton as noisy?

Postby richard-7 » Thu Aug 03, 2017 2:47 pm

Could be a bad engine bearing. Seen that in a 961 before.
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Re: Your Norton as noisy?

Postby bushman » Thu Aug 03, 2017 3:53 pm

What are the symptoms of the clutch basket issue?
I am finding the take off's are notchy - I can't feather the clutch for a smooth take off, it grabs intermittently, juddering, seems to be getting worse.

Then how does one check for a bad bearing without a full tear down?
Jim Bush, Vancouver, BC
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Re: Your Norton as noisy?

Postby richard-7 » Thu Aug 03, 2017 6:02 pm

You can remove the primary side cover to discover a lot. Push and pull on the balance shaft. The clutch basket. Etc....
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Re: Your Norton as noisy?

Postby NORTY2 » Fri Aug 04, 2017 12:20 am

bushman wrote:What are the symptoms of the clutch basket issue?
I am finding the take off's are notchy - I can't feather the clutch for a smooth take off, it grabs intermittently, juddering, seems to be getting worse.

Then how does one check for a bad bearing without a full tear down?


Hi Bushman.

I cant recall what year your bike was, however i picked up on your synthetic oil in the primary and it did help in my 2016 mk11. But your graunch and grab problem on clutch take up is the same as mine. Its been that way since new, now just over 4000 miles. I've concluded that you could spend your life and all your savings trying to perfect these 961's.

I watch, wait and learn what others do to resolve these annoying imperfections, most if not all are far more determined and qualified than I.
Much like the old Commando's from the 70's adaptions and improvements filtered through in time. But at 63 by the time the 961 teething issues are resolved I will be well past my sell by date. So in the meantime, or at least until something falls off or disintegrates I plan just to ride this beautiful bike. On saying that i would still love to learn if you discover a solution to the clutch issue.

Good luck.

Mark.

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Re: Your Norton as noisy?

Postby bushman » Fri Aug 04, 2017 7:22 am

I agree with your sentiment - I know it may take some time to sort out some of these issues and I am determined to see this through.

I am almost at the point of sending the bike to the dealer Norton in Ontario for a full upgrade.... question as always who foots the bill? Will Norton step up with some help?

In the mean time I will do as Richard suggests, pop the primary, remove the clutch and have a check around. Will check the valves as well.

What concerns me is the thrashing, clacking sounds don't sound at all healthy - I would hate to have the engine destroy itself because I am told to live with the noise, it is normal. How much is too much?

I have Norton's in the shed going back to 1950 and all motors are mechanically quiet - the Model 7 the quietest. Maybe I will keep my eye out for a insurance write-off 1200 Triumph engine for a new world Triton... it's been 20 years since I built a Triton, this would be an interesting project for sure.
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2016 Thruxton R
2014 MV Agusta F3 800
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