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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
oil holes in Crank pin?
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<blockquote data-quote="Vincent Brake" data-source="post: 172590" data-attributes="member: 398"><p>To all in the Know, Question:</p><p></p><p>where would one let the oil out to bearings, 90 degree to rear of TDC? left n right hand different?</p><p></p><p>Maughans drill 2 holes per side, 30degree before and after top of the crank, no difference for front or rear cylinder.</p><p></p><p>Ok, with let oil in both sides to the rollers (INA) 20mm wide, so 2 holes round 1mm on 18,5mm pitch (rollers are 16mm)</p><p>so rollers do not run on holes.</p><p></p><p>Making some cranks now, (with adjustable balance factor, from cylinder openings)</p><p>both 90 and 100mm. 84 and 92 JE pistons adjustable from 52-60% balance</p><p></p><p>Cheers[ATTACH=full]59479[/ATTACH]</p></blockquote><p></p>
[QUOTE="Vincent Brake, post: 172590, member: 398"] To all in the Know, Question: where would one let the oil out to bearings, 90 degree to rear of TDC? left n right hand different? Maughans drill 2 holes per side, 30degree before and after top of the crank, no difference for front or rear cylinder. Ok, with let oil in both sides to the rollers (INA) 20mm wide, so 2 holes round 1mm on 18,5mm pitch (rollers are 16mm) so rollers do not run on holes. Making some cranks now, (with adjustable balance factor, from cylinder openings) both 90 and 100mm. 84 and 92 JE pistons adjustable from 52-60% balance Cheers[ATTACH type="full"]59479[/ATTACH] [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
oil holes in Crank pin?
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