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A Newbie's CD125 Benly Part Restoration Project

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nazK
Two Stroke Sniffer



Joined: 29 Apr 2017
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PostPosted: 04:37 - 17 May 2019    Post subject: Reply with quote

Shall I try tapered roller bearings on steering if that's possible or stick with ball bearings?

Saw on YouTube a CB350 tapered bearings upgrade


Reading the comments on video, noticed few concerns with using tapered bearings:



Will it work on my bike to use tapered roller bearing and does it make a huge difference?

If so, shall I update both top and bottom or just the bottom ones and leave the top ones as balls bearings. Someone in the video comments mentioned that tapered bearings fittings on the top introduce tiny upwards height which may fiddle with the head light positioning.

Another comment was to use tapered bearings for both top and bottom but remove the washer from top to minimise the height gained?

I hope I was able to explain it.
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Bubbs
World Chat Champion



Joined: 28 May 2009
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PostPosted: 10:16 - 17 May 2019    Post subject: Reply with quote

Commenting to see updates, I have nothing constructive to add. Looks like you've put a lot of effort into this one, and even managed to stick around after Nobby was a right bastard to you. Well done.

Great work BTW, looking forward to seeing the final product.
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nazK
Two Stroke Sniffer



Joined: 29 Apr 2017
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PostPosted: 23:40 - 18 May 2019    Post subject: Reply with quote

Thanks Bubbs for your appreciation and kind words.

Updates: frame and other bits are pending main top coat in gloss black and then lacquer. Got the paint delivered, hopefully sun will come out one day to finish with this phase.

I asked about steering ball bearing upgrade in the previous post but have decided to go with ball bearings. I am going to order from David silver spares. One question on that, the old balls seem to be placed in some kind of plastic cage to retain them in place but I don't see that bit in Haynes manual? I found remains of that cage around some of the balls which I first thought was just dried out grease. Not sure If I should source the cage to retain 19 balls since David silver spares website don't show it in the kit.

All nuts, bolts and other bits were soaked in the apple cider vinegar (images attached to show the out come) for a few days and forgotten about to get rid of the rust. It worked following light brass wire brushing. Took me couple of hours...
The flash rust was quick to come back within minutes.

I was thinking to paint them in Silver but they look nice as they are and feel more mechanical in a dull steel shade. I might get them zinc plated if budget allows.

Or apply clear lacquer paint to cut back and polish but that requires investing in a bench grinder polisher. Still thinking how to go about that. I guess this might be the way forward to keep the original look and protected from future rust? All depends on the budget.

Or just paint them with no no nsense zinc galvanising spray paint 400ml from screw fix for £5.99?

What do you guys suggest on these points?

Before:

https://i.ibb.co/rxcY0zY/IMG-20190511-175044.jpg
https://i.ibb.co/kgg8xJS/IMG-20190510-223532.jpg

After:
https://i.ibb.co/SyzqsPH/IMG-20190519-WA0007.jpg
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Comuk
Borekit Bruiser



Joined: 18 Aug 2019
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PostPosted: 18:19 - 16 Sep 2019    Post subject: Reply with quote

This is an amazing topic for me as I am just starting to work on a cd200 benly. Would be great if you have any lessons learned for people like me. Great work!
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