Picture of NCR clutch with possible extra bushing.
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NCR bushings.png [ 12.22 MiB | Viewed 18618 times ] |
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| NCR clutch http://ducatittandf1.com/viewtopic.php?f=20&t=11982 |
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| Author: | flattop900 [ Thu Feb 27, 2020 5:06 pm ] | ||
| Post subject: | NCR clutch | ||
Picture of NCR clutch with possible extra bushing.
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| Author: | ducttf1 [ Thu Feb 27, 2020 10:05 pm ] |
| Post subject: | Re: NCR clutch |
Hi Flattop, could you turn the primary gear over to the other side? I haven't been in my shop, but I will be tomorrow. I do remember two 'spacers' in the primary. I'm sorry I'm not sure but will check tomorrow. Lou |
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| Author: | flattop900 [ Fri Feb 28, 2020 9:52 am ] | ||
| Post subject: | Re: NCR clutch | ||
Good Morning... Hope this helps. Regards... Flattop
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| Author: | ducttf1 [ Fri Feb 28, 2020 9:54 pm ] | ||||
| Post subject: | Re: NCR clutch | ||||
Hi Flattop, those two bushings/spacers are necessary. They are for mounting the clutch basket to the shaft. Now it is possible that the larger one isn't correct, because it should have an o-ring so it seals. Looking at your pictures, the basket seems to have a seal. I will include a few pictures. There is also a spacer between the two bearings in the primary gear. Lou
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| Author: | flattop900 [ Sat Feb 29, 2020 7:50 pm ] |
| Post subject: | Re: NCR clutch |
Hi Lou... The longer of the two spacers fits the lip seal in the basket. So it probably does the same job as the O-ring on yours. The thing missing on both is the sealing of the spacer ID like the internal O-ring used on F1 dry clutch. Is there some strategic use of sealer in play when assembling the clutch? Lights coming on slowly....almost there Flattop |
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| Author: | ducttf1 [ Sat Feb 29, 2020 8:28 pm ] |
| Post subject: | Re: NCR clutch |
Hi Flattop, the fit is really tight and I've not seen a seal of any kind. It is 'loaded' so the precise fit is probably how it works. If you have a sloppy fit I would make a new bush. I will take a look at the clutch basket tomorrow, I don't remember a seal like yours has. Lou |
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| Author: | 618F1 [ Sun Mar 01, 2020 3:19 pm ] |
| Post subject: | Re: NCR clutch |
Apparently things were changed now and then. Here is a photo of steel hubs with and without the large O ring. And with the small O ring outside the tall bush. The small flat washer is a stock part, I believe, that fits below that aluminum center hub to keep it from grounding on rotating steel parts below that. Attachment: IMG_1874.JPG [ 4.2 MiB | Viewed 18510 times ] Got these in a mish-mash box of assorted engine parts sold on ebay last year. Unfortunately, it did not come with the NCR side cover. And a stock dry-clutch cover does not work --- easily. MikeV |
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| Author: | ducttf1 [ Sun Mar 01, 2020 7:17 pm ] | |||
| Post subject: | Re: NCR clutch | |||
Hi Mike, you are correct, everything changes all the time! I have never seen a basket with a spring seal. All the clutches I've seen have the bushing. You can see the difference in the ID. Lou
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| Author: | flattop900 [ Tue Mar 03, 2020 3:00 pm ] | ||
| Post subject: | Re: NCR clutch | ||
Gentlemen... It's good to know that there are two versions of this clutch. I was getting worried I had a non OEM modified version. So we know that the O.D. of the spacer is sealed with an O-ring or lip seal, but what keeps the oil from migrating between the main shaft and I.D. of the spacer? Does the F1 spacer not have an internal O-ring to perform that task? Flattop
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