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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Still Can't Start My Twin, Replaced Mag, But Not A Pop
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<blockquote data-quote="Jim Bush" data-source="post: 174143" data-attributes="member: 3807"><p>My recent experience with a good running bike that became a beast to start, 20-30sec run and big backfires, big enough to split a starter gear in half - came down to how the magneto bearing end housing with cam-ring was installed. I had taken the mag off to replace the capacitor - I pulled the end bearing / cam-ring housing off and then when I re-installed it, I had inadvertently installed it 180 deg out. Thankfully I had taken a photo of the mag before I removed it, so it became obvious when I looked at the photo (after the carnage). </p><p></p><p>The mag cap pillar bolt with the clip to hold the black cap on - I had placed at the bottom (right), when originally it was at the top (left). The short side of the cam ring is on the left (see pic). I rotated the housing 180, retimed it to 4deg BTDC (ATD closed) and perfect again.</p></blockquote><p></p>
[QUOTE="Jim Bush, post: 174143, member: 3807"] My recent experience with a good running bike that became a beast to start, 20-30sec run and big backfires, big enough to split a starter gear in half - came down to how the magneto bearing end housing with cam-ring was installed. I had taken the mag off to replace the capacitor - I pulled the end bearing / cam-ring housing off and then when I re-installed it, I had inadvertently installed it 180 deg out. Thankfully I had taken a photo of the mag before I removed it, so it became obvious when I looked at the photo (after the carnage). The mag cap pillar bolt with the clip to hold the black cap on - I had placed at the bottom (right), when originally it was at the top (left). The short side of the cam ring is on the left (see pic). I rotated the housing 180, retimed it to 4deg BTDC (ATD closed) and perfect again. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Still Can't Start My Twin, Replaced Mag, But Not A Pop
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