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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Fogging for Mosquitos; Valve Guide Issues and Solutions
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<blockquote data-quote="ClassicBiker" data-source="post: 107756" data-attributes="member: 1632"><p>Thank you Chankly, I read that in "Forty Years On" and thought he was referring to pre-war Comets only as there was mention of 90° and 100° in the same paragraph. I messed about briefly with a level on the face of the valve cap and an adjustable draftsman's triangle under the head's face and got 57° and thought "no, you're messed up there." Thanks for clearing that up.</p><p></p><p></p><p>Thanks Litnman, I read that on the data bases here and also in "FYO" and thought it referred to the angle of the valve face for sealing.</p><p></p><p></p><p>Vic, not just cleaning up the valve guide bores but the threaded portion of the head where the valve guide lock ring used to reside. It is complete chewed up. My plan is to clean up the bore where the forked end of the rocker operates all the way down to surface that the shoulder of the lower valve guide rests against. Then make a modified keeper that Timetraveller refers too. Once I've got that sorted then I have to address the guide bore to keep is concentric to the valve seat ring. Living just outside of Detroit there are plenty of tool suppliers to source reamers from. Thanks for the post it has given me some ideas.</p><p></p><p>Steven</p></blockquote><p></p>
[QUOTE="ClassicBiker, post: 107756, member: 1632"] Thank you Chankly, I read that in "Forty Years On" and thought he was referring to pre-war Comets only as there was mention of 90° and 100° in the same paragraph. I messed about briefly with a level on the face of the valve cap and an adjustable draftsman's triangle under the head's face and got 57° and thought "no, you're messed up there." Thanks for clearing that up. Thanks Litnman, I read that on the data bases here and also in "FYO" and thought it referred to the angle of the valve face for sealing. Vic, not just cleaning up the valve guide bores but the threaded portion of the head where the valve guide lock ring used to reside. It is complete chewed up. My plan is to clean up the bore where the forked end of the rocker operates all the way down to surface that the shoulder of the lower valve guide rests against. Then make a modified keeper that Timetraveller refers too. Once I've got that sorted then I have to address the guide bore to keep is concentric to the valve seat ring. Living just outside of Detroit there are plenty of tool suppliers to source reamers from. Thanks for the post it has given me some ideas. Steven [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Fogging for Mosquitos; Valve Guide Issues and Solutions
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