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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Tank mounting misalignment
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<blockquote data-quote="Oldhaven" data-source="post: 54507" data-attributes="member: 2879"><p>Bill, I was right in the middle of a tapered roller bearing conversion, so I had a chance to look at the roundness. Nothing noticeable in the bores. since the new Patzke outer bearing races fit fine. I have attached another picture showing the steering stop, which, as you say, got a right bashing. It is hard to believe the headlug could bend between the steering head and the tank mount, which is why I was so skeptical at first, but the evidence is right there, and David confirms how common slight bending is. This still does not explain why the tank mounting holes are so far off center in the bosses, but I think I can assume that the through hole was drilled on the same setup as the other machined surfaces, or using the machined flats for the tank mounting bolts, so the small rod shown through the tank mounts should be parallel to all the other ones. this in itself is a good indication of the correction needed. I won't be able to do the testing David suggests until the end of next week, but that is the next plan.</p><p></p><p>[ATTACH=full]2835[/ATTACH]</p></blockquote><p></p>
[QUOTE="Oldhaven, post: 54507, member: 2879"] Bill, I was right in the middle of a tapered roller bearing conversion, so I had a chance to look at the roundness. Nothing noticeable in the bores. since the new Patzke outer bearing races fit fine. I have attached another picture showing the steering stop, which, as you say, got a right bashing. It is hard to believe the headlug could bend between the steering head and the tank mount, which is why I was so skeptical at first, but the evidence is right there, and David confirms how common slight bending is. This still does not explain why the tank mounting holes are so far off center in the bosses, but I think I can assume that the through hole was drilled on the same setup as the other machined surfaces, or using the machined flats for the tank mounting bolts, so the small rod shown through the tank mounts should be parallel to all the other ones. this in itself is a good indication of the correction needed. I won't be able to do the testing David suggests until the end of next week, but that is the next plan. [ATTACH=full]2835[/ATTACH] [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Tank mounting misalignment
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