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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Worn cams/Oil restrictor disc mystery in timing cover...
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<blockquote data-quote="chankly bore" data-source="post: 38803" data-attributes="member: 317"><p><strong>Mystery</strong></p><p></p><p>The restrictor discs were a fitting to lessen oil flow to the piston, not the camshaft spindle. These should have about a .025" hole in them and are usually made of .006" brass. The rubber washers should bear up against a Nyloc or Simmonds thin nut 5/16" B.S.F. part no. 98. A lot of 1970's cams and followers seemed to suffer wear and there has been a lot of debate as to the reason(s). P.E.I. used to say a lot more damage was caused by thick oil not getting where it was useful than by thin oil breaking down! Use only oil for pre 1985 vehicles, not one for Paralytic Perverter cars. The older oils are better at lubricating long flat surfaces. I recommed you buy "Know Thy Beast" and do a bit of homework on old car or motorcycle sites re lubrication. Cheers, F5AB/2A/7945 since 1970 P.S. another possible cause is wrong cams with wrong lower valve guides!!!!</p></blockquote><p></p>
[QUOTE="chankly bore, post: 38803, member: 317"] [b]Mystery[/b] The restrictor discs were a fitting to lessen oil flow to the piston, not the camshaft spindle. These should have about a .025" hole in them and are usually made of .006" brass. The rubber washers should bear up against a Nyloc or Simmonds thin nut 5/16" B.S.F. part no. 98. A lot of 1970's cams and followers seemed to suffer wear and there has been a lot of debate as to the reason(s). P.E.I. used to say a lot more damage was caused by thick oil not getting where it was useful than by thin oil breaking down! Use only oil for pre 1985 vehicles, not one for Paralytic Perverter cars. The older oils are better at lubricating long flat surfaces. I recommed you buy "Know Thy Beast" and do a bit of homework on old car or motorcycle sites re lubrication. Cheers, F5AB/2A/7945 since 1970 P.S. another possible cause is wrong cams with wrong lower valve guides!!!! [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Worn cams/Oil restrictor disc mystery in timing cover...
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