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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet Mongrel
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<blockquote data-quote="Cyborg" data-source="post: 104853" data-attributes="member: 3426"><p>The plan for the indicator was to get an idea of how much expansion one stroke of the pump would produce, but didn't end up using it. After priming the pump and getting most of the air out of the tank, I gave the pump a couple of strokes, but the gauge on the tank didn't show any pressure. Long story short, it took less pressure than the gauge would indicate to begin expanding the tank. Doubt if the gauge is very accurate. Anyway, it turned out ok. The aluminum was annealed prior to bending it over the buck, so that would have made it easier to form at lower pressure. When done, the whole mess was put in the oven at 200F or so for about an hour and the tank popped up just like the indicator in the turkey. The Cerrobend runs off the aluminum like water and any bits remaining were just wiped off with a rag. It did its job, the sides and rear of the tank didn't budge, so it still fits the bike.</p><p></p><p>[ATTACH=full]26101[/ATTACH][ATTACH]26102[/ATTACH]</p></blockquote><p></p>
[QUOTE="Cyborg, post: 104853, member: 3426"] The plan for the indicator was to get an idea of how much expansion one stroke of the pump would produce, but didn't end up using it. After priming the pump and getting most of the air out of the tank, I gave the pump a couple of strokes, but the gauge on the tank didn't show any pressure. Long story short, it took less pressure than the gauge would indicate to begin expanding the tank. Doubt if the gauge is very accurate. Anyway, it turned out ok. The aluminum was annealed prior to bending it over the buck, so that would have made it easier to form at lower pressure. When done, the whole mess was put in the oven at 200F or so for about an hour and the tank popped up just like the indicator in the turkey. The Cerrobend runs off the aluminum like water and any bits remaining were just wiped off with a rag. It did its job, the sides and rear of the tank didn't budge, so it still fits the bike. [ATTACH type="full" alt="26101"]26101[/ATTACH][ATTACH alt="26102"]26102[/ATTACH] [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet Mongrel
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