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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Cases Damaged Due To Race and Bearing Modification? Not Sure...
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<blockquote data-quote="timetraveller" data-source="post: 169313" data-attributes="member: 456"><p>There is a very nice mod which I think is due to Dan Smith It consists of making a top hat bush which is inserted from the outer side of the drive side main bearing. The outer face of the tunnel is machined back to allow for the flange which has three countersunk holes in it to locate it. The outer end of the bush has a left hand thread to take an oil seal. Inside the tube of the bush is an is reduced diameter section. Two back to back taper roller bearings are used with about two to four thou nip. The inner taper roller locates against the face of the drive side flywheel and stops it ever moving sideways. the flywheel assembly cannot move inwards as that motion is controlled by the outer taper roller. As the top hat bush has to be made and its outer diameter can be adjusted to compensate or any work that has to be done to rescue the hole in the crank case it has always seemed to me to be a very nice mod.</p></blockquote><p></p>
[QUOTE="timetraveller, post: 169313, member: 456"] There is a very nice mod which I think is due to Dan Smith It consists of making a top hat bush which is inserted from the outer side of the drive side main bearing. The outer face of the tunnel is machined back to allow for the flange which has three countersunk holes in it to locate it. The outer end of the bush has a left hand thread to take an oil seal. Inside the tube of the bush is an is reduced diameter section. Two back to back taper roller bearings are used with about two to four thou nip. The inner taper roller locates against the face of the drive side flywheel and stops it ever moving sideways. the flywheel assembly cannot move inwards as that motion is controlled by the outer taper roller. As the top hat bush has to be made and its outer diameter can be adjusted to compensate or any work that has to be done to rescue the hole in the crank case it has always seemed to me to be a very nice mod. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Cases Damaged Due To Race and Bearing Modification? Not Sure...
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