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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Crankshaft Balance Method
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<blockquote data-quote="LoneStar" data-source="post: 116185" data-attributes="member: 585"><p>Greg & Bill,</p><p></p><p>I chose the radial holes on the rim, instead of enlarging the existing axial holes, specifically because I was worried about either damaging the rod big ends or getting swarf into the bearings - the holes end right at the rods. </p><p></p><p>The holes I drilled are about 1cm deep at the edge, deeper in the middle because of cone-tipped drill bits. I wanted to get them all the same, so used a syringe to fill them with water and test how much material had been removed, during drilling. This also allows figuring how much weight has been removed. I settled on 4ml each.</p><p></p><p>With the radial holes being some distance from the big end bearing, so less of a swarf risk, I just wrapped some tape around the rod big ends at the junction with the flywheel.</p></blockquote><p></p>
[QUOTE="LoneStar, post: 116185, member: 585"] Greg & Bill, I chose the radial holes on the rim, instead of enlarging the existing axial holes, specifically because I was worried about either damaging the rod big ends or getting swarf into the bearings - the holes end right at the rods. The holes I drilled are about 1cm deep at the edge, deeper in the middle because of cone-tipped drill bits. I wanted to get them all the same, so used a syringe to fill them with water and test how much material had been removed, during drilling. This also allows figuring how much weight has been removed. I settled on 4ml each. With the radial holes being some distance from the big end bearing, so less of a swarf risk, I just wrapped some tape around the rod big ends at the junction with the flywheel. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Crankshaft Balance Method
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