scottroddam Posted January 7, 2021 Report Share Posted January 7, 2021 Hi, I'm Scott from the UK, I have just recently signed up on here, I am in the process of restoring a 1976 bultaco 159, I'm wondering if anyone would know the steering bearing number, this is the upgraded taper bearing and race? id like the number to I can source one from my local bearing shop. Quote Link to comment Share on other sites More sharing options...
scottroddam Posted January 7, 2021 Author Report Share Posted January 7, 2021 Thank you for that, Id like to know the bearing number so I can go to my local bearing supplier and get one as I need a few bearing Quote Link to comment Share on other sites More sharing options...
lorenzo Posted January 7, 2021 Report Share Posted January 7, 2021 These bearings are so specialised (replacing ball thrust bearings, equally specialised) that even with a number, if indeed you could ever find one, there is no chance that you will find them at your local bearing shop. (This is of course a chance for someone to reveal which local bearing shop has them in stock - and prove me wrong ...........!!) Good luck with your quest, anyway. Quote Link to comment Share on other sites More sharing options...
carl ekblom Posted January 7, 2021 Report Share Posted January 7, 2021 I think they are non standard dimensions. Pyramid Parts also stock the conical bearing Quote Link to comment Share on other sites More sharing options...
scottroddam Posted January 7, 2021 Author Report Share Posted January 7, 2021 I've been told that they are bearing number 30205? Quote Link to comment Share on other sites More sharing options...
carl ekblom Posted January 7, 2021 Report Share Posted January 7, 2021 30205 is 25x52x16,25 The Pyramid bearing for Sherpa is 25x45x12 Quote Link to comment Share on other sites More sharing options...
scottroddam Posted January 7, 2021 Author Report Share Posted January 7, 2021 Is that the same as a 159 measurements? Quote Link to comment Share on other sites More sharing options...
woody Posted January 7, 2021 Report Share Posted January 7, 2021 The bearing is 25mm ID and 45mm OD. The depth of the bearing housing in the frame headstock is 11m. Whether 11mm is the actual measurement of the bearing height I don't know without measuring an original, it may be 12mm. If you can find a bearing 25x45x11 you'll do well. Pyramid parts sell Bultaco bearings off the shelf and as Carl said they are 25x45x12. They fit fine. You'll also do well to find this size at a local stockist. I would guess the In Motion bearings are the same but I haven't used them. I first fitted tapers about 15 years ago and the only source with a direct replacement was Pyramid, no-one else did them and I bought a number to keep me stocked for future rebuilds. Millers sold a kit but they weren't the right depth and needed the big nut that tensions the top bearing machined to make them fit. All Sherpas are the same size bearing 1 Quote Link to comment Share on other sites More sharing options...
scottroddam Posted January 7, 2021 Author Report Share Posted January 7, 2021 So basically it will just be as easy getting them from in motion rather than sourcing from my local bearing shop? Quote Link to comment Share on other sites More sharing options...
woody Posted January 7, 2021 Report Share Posted January 7, 2021 Give your local shop the dimensions and see what they say, if they can't help they're available at In Motion or Pyramid parts Quote Link to comment Share on other sites More sharing options...
carl ekblom Posted January 8, 2021 Report Share Posted January 8, 2021 (edited) The markings on the Pyramid bearing are Japan NTN 25x45x12 45H 25H Pyramid sales number is BR44 Edited January 8, 2021 by carl ekblom Quote Link to comment Share on other sites More sharing options...
pschrauber Posted January 8, 2021 Report Share Posted January 8, 2021 (edited) I would try your local or special onlie bearing dealer, because, you often get no name bearings from our parts supplieres and I had issues with no name bearings, especially with wheel bearings and engine bearings, therefore I now only buy them from motorcycle part dealers if they can confirm my personal needs in terms of quality and brand. I personal prefer FAG (German) bearings, then SKF (from Sweden), then NSK (from Japan), last not least INA also from Germany. Who pays cheap pays twice ... Edited January 8, 2021 by pschrauber Spelling and Sentence issues fixed 1 1 Quote Link to comment Share on other sites More sharing options...
pschrauber Posted January 8, 2021 Report Share Posted January 8, 2021 39 minutes ago, trialsrfun said: Simply Bearings Ltd ~ Oil Seals SKF FAG TIMKEN KOYO NTN NKE TRULOC Needle Rollers Taper Rollers Rod Ends Oil Filled Bushes Loose Balls O Rings Grease Plain Thrust The above company are very helpful but why not buy from Inmotion Bultaco UK when they have them in stock? As mentioned it is not only the size that matters too the quality. And I have got no name products from different classic motorcycle parts suppliers and stores and learned my lesson, ask about the ressource and specific product before you buy if it is not clearly answered written uo in advance or before you buy. Most bearing sellers do mention beside tyoe and measurements too the quality and brand. Quote Link to comment Share on other sites More sharing options...
scottroddam Posted January 8, 2021 Author Report Share Posted January 8, 2021 I'd like to get some good quality bearing so the last, and in motion don't list a goow make Quote Link to comment Share on other sites More sharing options...
sherpa325 Posted January 8, 2021 Report Share Posted January 8, 2021 There is nothing actually wrong with the original ball/cup set up, they last indefinitely and require minimal maintenance in comparison to all my newer bikes which have the tapered roller setup. Quote Link to comment Share on other sites More sharing options...
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