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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Twin Magneto
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<blockquote data-quote="b.l.hayward@tesco.net" data-source="post: 4566" data-attributes="member: 865"><p><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite5" alt=":confused:" title="Confused :confused:" loading="lazy" data-shortname=":confused:" /> Ok gents, thanks for the inputs and herewith an update. Decided to check the timing just in case (was part of the rebuild done by another!) and found that the rear (No.1) cylinder had the points opening MORE than full advance when on full retard (ps forgot to say that I have a manual mag - cable adv/ret). Geronimo! - the solution was simply a retime - NOT! Retimed using the bottom lobe on the cam and obviously No1 was ok. But No2 would fire at just before BDC of the induction stroke and would equal flames thru the carb on No2 - not good. So it looks as though the end plate of the mag is indeed 180 degrees out. BUT I can't turn it because of the boss for the cable adv/ret - it would foul the big oil filter chamber nut. SO why can't I time No1 using what is currently the top cam lobe and switch round the plug leads? After all, the distance between the lobes will be correct then.</p></blockquote><p></p>
[QUOTE="b.l.hayward@tesco.net, post: 4566, member: 865"] :confused: Ok gents, thanks for the inputs and herewith an update. Decided to check the timing just in case (was part of the rebuild done by another!) and found that the rear (No.1) cylinder had the points opening MORE than full advance when on full retard (ps forgot to say that I have a manual mag - cable adv/ret). Geronimo! - the solution was simply a retime - NOT! Retimed using the bottom lobe on the cam and obviously No1 was ok. But No2 would fire at just before BDC of the induction stroke and would equal flames thru the carb on No2 - not good. So it looks as though the end plate of the mag is indeed 180 degrees out. BUT I can't turn it because of the boss for the cable adv/ret - it would foul the big oil filter chamber nut. SO why can't I time No1 using what is currently the top cam lobe and switch round the plug leads? After all, the distance between the lobes will be correct then. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Twin Magneto
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