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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Tank Mounting
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<blockquote data-quote="Gary Gittleson" data-source="post: 117992" data-attributes="member: 3625"><p>I have a related question. What's the function of the 762 washer under the front mounting bolt? The bolt locks down at the shoulder against the UFM and the rubber can't escape at all. If using the washer, it obviously needs to be smaller than the hole in the tank, so as not to bottom out the bolt head and force the tab on the tank to bend. On my bike I find that the distance from the shoulder of the bolt to the underside of the head is slightly less than the thickness of the rubber, so the rubber is slightly compressed when the bolt is tightened. That seems correct to me. If the washer is used, the distance is reduced, thereby compressing the rubber more than needed or perhaps even desirable. More compression probably means less vibration absorption, although I realize that this subject becomes rather complex.</p></blockquote><p></p>
[QUOTE="Gary Gittleson, post: 117992, member: 3625"] I have a related question. What's the function of the 762 washer under the front mounting bolt? The bolt locks down at the shoulder against the UFM and the rubber can't escape at all. If using the washer, it obviously needs to be smaller than the hole in the tank, so as not to bottom out the bolt head and force the tab on the tank to bend. On my bike I find that the distance from the shoulder of the bolt to the underside of the head is slightly less than the thickness of the rubber, so the rubber is slightly compressed when the bolt is tightened. That seems correct to me. If the washer is used, the distance is reduced, thereby compressing the rubber more than needed or perhaps even desirable. More compression probably means less vibration absorption, although I realize that this subject becomes rather complex. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Tank Mounting
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