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Chopped Twin Running At Last!
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<blockquote data-quote="Pushrod Twin" data-source="post: 93237" data-attributes="member: 340"><p>Bill, dont knock your own ability, I believe you are on the right track. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> I welded the badly bell-mouthed holes in the flywheels which came out of this engine & left the mains spindles in place. I tried to match the outside diameters together & bore through both at once, pretty difficult. Be prepared for shrinkage to distort the OD's. I turned the OD's after welding then bored the BE holes in the mill with a boring head. Disaster!! <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite10" alt=":oops:" title="Oops! :oops:" loading="lazy" data-shortname=":oops:" />One was fine, the other bored a thou over size & knowing that I would need to turn the OD's down more after the next welding, I gave up & bought the TP crank. </p><p>When I make the replacements I will rough them out, tack weld the wheels together,then bore & hone the mains spindle bores, then same the BE's. Then split them, fit the mains spindles & finish the OD's & faces with the spindles between centres as I believe The Factory did.</p></blockquote><p></p>
[QUOTE="Pushrod Twin, post: 93237, member: 340"] Bill, dont knock your own ability, I believe you are on the right track. :) I welded the badly bell-mouthed holes in the flywheels which came out of this engine & left the mains spindles in place. I tried to match the outside diameters together & bore through both at once, pretty difficult. Be prepared for shrinkage to distort the OD's. I turned the OD's after welding then bored the BE holes in the mill with a boring head. Disaster!! :oops:One was fine, the other bored a thou over size & knowing that I would need to turn the OD's down more after the next welding, I gave up & bought the TP crank. When I make the replacements I will rough them out, tack weld the wheels together,then bore & hone the mains spindle bores, then same the BE's. Then split them, fit the mains spindles & finish the OD's & faces with the spindles between centres as I believe The Factory did. [/QUOTE]
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Chopped Twin Running At Last!
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