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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Tank bolts shaking loose
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<blockquote data-quote="stumpy lord" data-source="post: 32084" data-attributes="member: 207"><p>Hi Standard bolts are 5/16 B.S.F. </p><p> When fitted correctly the shoulder is supposed to be tightend down hard against the boss on the head stock( thats why they are shoulderd), if not the torsion built up in the rubber when fitting tends to cause the bolt to undo.</p><p> If you carry out a helicoil repair to the head stock then you must have a pair of tank bolts made up that have a larger diameter on the shoulder, other wise when you tighten the bolts down the, the shoulder will be bearing against the end of the helicoil insert and not the boss on the head stock, you will of course have to enlarg the hole in the rubber bush to acomodate the larger dia of the new tank bolt.</p></blockquote><p></p>
[QUOTE="stumpy lord, post: 32084, member: 207"] Hi Standard bolts are 5/16 B.S.F. When fitted correctly the shoulder is supposed to be tightend down hard against the boss on the head stock( thats why they are shoulderd), if not the torsion built up in the rubber when fitting tends to cause the bolt to undo. If you carry out a helicoil repair to the head stock then you must have a pair of tank bolts made up that have a larger diameter on the shoulder, other wise when you tighten the bolts down the, the shoulder will be bearing against the end of the helicoil insert and not the boss on the head stock, you will of course have to enlarg the hole in the rubber bush to acomodate the larger dia of the new tank bolt. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Tank bolts shaking loose
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