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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="CarlHungness" data-source="post: 173011" data-attributes="member: 2517"><p>I know the Lucas Magneto is good, journeyman Doug Wood tested it and says it's OK. I bench tested it myself by just spinning the shaft with my fingers and got #1 to fire, couldn't spin it fast enough to fire #2, but didn' worry about it as Doug said it's sparking. I installed it at 35 degrees BTDC with ATD blocked open. Can't get as much as a pop out of the plot. Last summer, the last time I rode it it took me 30 minutes to start it with the B-TH. I ran the carbs dry as usual, drained the gas tank, ordered new coils for the B-TH, still no spark. Had it tested locally, new and old coils are OK, but B-TH won't fire them. Thus I re-installed my Lucas. I have probably put the Lucas in 4-5 times over the years and the B-TH once, so my procedure has worked in the past. I am not getting wet plugs either, so wondering what to tear apart next. Wonder if the kill button wire could be shorting out the mag. Will un-hook it tomorrow and start over. Looking for suggestions. This is the first time the machine has not started in over 30 years of ownership when I've replaced the sparking provider.</p></blockquote><p></p>
[QUOTE="CarlHungness, post: 173011, member: 2517"] I know the Lucas Magneto is good, journeyman Doug Wood tested it and says it's OK. I bench tested it myself by just spinning the shaft with my fingers and got #1 to fire, couldn't spin it fast enough to fire #2, but didn' worry about it as Doug said it's sparking. I installed it at 35 degrees BTDC with ATD blocked open. Can't get as much as a pop out of the plot. Last summer, the last time I rode it it took me 30 minutes to start it with the B-TH. I ran the carbs dry as usual, drained the gas tank, ordered new coils for the B-TH, still no spark. Had it tested locally, new and old coils are OK, but B-TH won't fire them. Thus I re-installed my Lucas. I have probably put the Lucas in 4-5 times over the years and the B-TH once, so my procedure has worked in the past. I am not getting wet plugs either, so wondering what to tear apart next. Wonder if the kill button wire could be shorting out the mag. Will un-hook it tomorrow and start over. Looking for suggestions. This is the first time the machine has not started in over 30 years of ownership when I've replaced the sparking provider. [/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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