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Headstock Bearings
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<blockquote data-quote="Prosper Keating" data-source="post: 10591" data-attributes="member: 1376"><p>Even if TRBs in this application had half the average life of BBs, they're probably superior in many respects on the road. Of course, many members' machines no longer do much road work so corrosion during long periods of disuse may well be a problem. </p><p></p><p>Vince raises a good point about waterproof greases. Regarding grease in general, it is a good idea to disassemble components lubricated with any kind of grease from time to time, clean them thoroughly and regrease them. It is also a good idea to use grease nipples for their intended purpose. </p><p></p><p>BMW has used TRBs since the early 1950s. My Series 2 had TRBs in the steering head and both swinging forks. They are a better bet than BBs as the Earles forks are heavy and the same must logically apply to Girdraulics. I have BBs supporting my Girdraulics and they are trouble-free because I check them at least once a week, given the cobblestones and other vagaries of Parisian streets. </p><p></p><p>I might well fit TRBs when the time comes for a change. It is true that adjustment is a precise art. As a general rule, it is a good plan to remove all control cables from the equation and to jack up the front end so that you can feel the movement from side to side. Those of you used to BBs will see this as a royal pain in the arse in terms of weekly maintenance. However, this is offset by the fact that your TRBs, once adjusted properly and locked off, may need no further attention for months or even years. In other words, at regreasing intervals. </p><p></p><p>I probably wouldn't bother with TRBs, on the other hand, for my Bramptons as the BBs seem perfectly adequate for the job, even though Bramptons seem to be heavier than Girdraulics. Unsprung weight may be greater though as the low speed steering is certainly as ponderous as that of an Earles-forked Series 2 BMW, whose unsprung weight is rather more than that of the average telescopic fork. </p><p></p><p>Regular use and regular maintenance... Can't beat it for keeping old machines happy and in good order.</p><p></p><p>PK</p></blockquote><p></p>
[QUOTE="Prosper Keating, post: 10591, member: 1376"] Even if TRBs in this application had half the average life of BBs, they're probably superior in many respects on the road. Of course, many members' machines no longer do much road work so corrosion during long periods of disuse may well be a problem. Vince raises a good point about waterproof greases. Regarding grease in general, it is a good idea to disassemble components lubricated with any kind of grease from time to time, clean them thoroughly and regrease them. It is also a good idea to use grease nipples for their intended purpose. BMW has used TRBs since the early 1950s. My Series 2 had TRBs in the steering head and both swinging forks. They are a better bet than BBs as the Earles forks are heavy and the same must logically apply to Girdraulics. I have BBs supporting my Girdraulics and they are trouble-free because I check them at least once a week, given the cobblestones and other vagaries of Parisian streets. I might well fit TRBs when the time comes for a change. It is true that adjustment is a precise art. As a general rule, it is a good plan to remove all control cables from the equation and to jack up the front end so that you can feel the movement from side to side. Those of you used to BBs will see this as a royal pain in the arse in terms of weekly maintenance. However, this is offset by the fact that your TRBs, once adjusted properly and locked off, may need no further attention for months or even years. In other words, at regreasing intervals. I probably wouldn't bother with TRBs, on the other hand, for my Bramptons as the BBs seem perfectly adequate for the job, even though Bramptons seem to be heavier than Girdraulics. Unsprung weight may be greater though as the low speed steering is certainly as ponderous as that of an Earles-forked Series 2 BMW, whose unsprung weight is rather more than that of the average telescopic fork. Regular use and regular maintenance... Can't beat it for keeping old machines happy and in good order. PK [/QUOTE]
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