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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
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<blockquote data-quote="oexing" data-source="post: 104112" data-attributes="member: 1493"><p>The trick with the extractor thread is the only way to separate a cover that is flush all around it to the crank case like on the 460 Horex in the photo. Most covers have 1/4 screws or 6mm to hold onto the engine. The next suitable size in the through hole in the cover is 5/16 for US Americans, the rest of world will find a M 8 metric tap and screw. You can tap the cover on the bike at opposite sides when the need arises and for very short available thread length in the cover the typical single cut tap will lift the cover as soon as it bottoms at the smaller case thread . Else you will just tap for a healthy length of thread in the cover, push in a piece of 5mm rod, long enough to bottom in the engine case and a extractor screw will push onto that 5 mm rod to lift the case. A grub screw flush in the case will do just fine instead of the rod.</p><p>It is easier to do than to describe but you don´t have to design some other means of forcing the cover to break loose.</p><p></p><p> Vic</p><p>[ATTACH=full]25728[/ATTACH]</p></blockquote><p></p>
[QUOTE="oexing, post: 104112, member: 1493"] The trick with the extractor thread is the only way to separate a cover that is flush all around it to the crank case like on the 460 Horex in the photo. Most covers have 1/4 screws or 6mm to hold onto the engine. The next suitable size in the through hole in the cover is 5/16 for US Americans, the rest of world will find a M 8 metric tap and screw. You can tap the cover on the bike at opposite sides when the need arises and for very short available thread length in the cover the typical single cut tap will lift the cover as soon as it bottoms at the smaller case thread . Else you will just tap for a healthy length of thread in the cover, push in a piece of 5mm rod, long enough to bottom in the engine case and a extractor screw will push onto that 5 mm rod to lift the case. A grub screw flush in the case will do just fine instead of the rod. It is easier to do than to describe but you don´t have to design some other means of forcing the cover to break loose. Vic [ATTACH=full]25728[/ATTACH] [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Vincent Tools
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