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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Friendly chap with huge kickstart foot required!
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<blockquote data-quote="Phil Baker" data-source="post: 32387" data-attributes="member: 2693"><p><span style="font-family: 'Times'"><span style="font-size: 15px">Continuing what would in today's terms would doubtless be called 'my journey' only I ain't goin' no journey on the Comet............. I have now not only turned the top link the right way up (not too hard) but also turned the bottom link up the right way and THAT meant inventing a whole new raft of bad words. Incidentally, as I make furniture as a hobby I have sash cramps knocking about and they were great for compressing the springs for refitting to the girdraulics.</span></span></p><p><span style="font-family: 'Times'"><span style="font-size: 15px"></span></span></p><p><span style="font-family: 'Times'"><span style="font-size: 15px">The valve timing is still driving me nuts! I've just bent a pushrod so that's it until Russ sends a new one..... Can't get the timing anywhere near - if I get the inlet valve opening at approx 41 degrees before TDC it doesn't close anywhere near the right time. Exhaust is all over the place. How can that be????</span></span></p><p><span style="font-family: 'Times'"><span style="font-size: 15px"></span></span></p><p><span style="font-family: 'Times'"><span style="font-size: 15px">I've ordered a new pushrod from Russ in Wales and it should come tomorrow or Friday.</span></span></p><p><span style="font-family: 'Times'"><span style="font-size: 15px"></span></span></p><p><span style="font-family: 'Times'"><span style="font-size: 15px">My cams are Mk 1 - compared with one that Stumpy has with a Mk 1 exhaust and Mk 2 inlet with an invoice to point the way. So the figures in the book should be right: inlet opening 44 degrees BTDC or 41 degrees, dpending upon the book.....</span></span></p><p><span style="font-family: 'Times'"><span style="font-size: 15px"></span></span></p><p><span style="font-family: 'Times'"><span style="font-size: 15px">Anyway, I think that the cams, the shaft, and the cam gearwheel itself have been pressed out and refitted out of line with the original settings and my thought was, before bending the pushrod in the endeavour, to put the cam pinion in with the cam tight up against the inlet cam follower as if it is about to open the inlet valve (verified by a dial gauge), with the piston at 41 degrees before top dead centre. The only problem I have with that is that I don't know where the breather pinion 'B' should be because there is nothing for it to line up with - does it matter? - although, thinking whilst writing, I could then rotate the engine and match it in with the book setting B tooth leaving to B tooth leaving the alloy large idler. Is there a particular time at which the engine should breathe? Anybody got a view on that, please?</span></span></p></blockquote><p></p>
[QUOTE="Phil Baker, post: 32387, member: 2693"] [FONT=Times][SIZE=4]Continuing what would in today's terms would doubtless be called 'my journey' only I ain't goin' no journey on the Comet............. I have now not only turned the top link the right way up (not too hard) but also turned the bottom link up the right way and THAT meant inventing a whole new raft of bad words. Incidentally, as I make furniture as a hobby I have sash cramps knocking about and they were great for compressing the springs for refitting to the girdraulics. The valve timing is still driving me nuts! I've just bent a pushrod so that's it until Russ sends a new one..... Can't get the timing anywhere near - if I get the inlet valve opening at approx 41 degrees before TDC it doesn't close anywhere near the right time. Exhaust is all over the place. How can that be???? I've ordered a new pushrod from Russ in Wales and it should come tomorrow or Friday. My cams are Mk 1 - compared with one that Stumpy has with a Mk 1 exhaust and Mk 2 inlet with an invoice to point the way. So the figures in the book should be right: inlet opening 44 degrees BTDC or 41 degrees, dpending upon the book..... Anyway, I think that the cams, the shaft, and the cam gearwheel itself have been pressed out and refitted out of line with the original settings and my thought was, before bending the pushrod in the endeavour, to put the cam pinion in with the cam tight up against the inlet cam follower as if it is about to open the inlet valve (verified by a dial gauge), with the piston at 41 degrees before top dead centre. The only problem I have with that is that I don't know where the breather pinion 'B' should be because there is nothing for it to line up with - does it matter? - although, thinking whilst writing, I could then rotate the engine and match it in with the book setting B tooth leaving to B tooth leaving the alloy large idler. Is there a particular time at which the engine should breathe? Anybody got a view on that, please?[/SIZE][/FONT] [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Friendly chap with huge kickstart foot required!
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