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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Throttle Slide Needle
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<blockquote data-quote="moto8500" data-source="post: 160536" data-attributes="member: 4798"><p>This thread is for the carburetor aficionados amongst us.</p><p></p><p>I am running the Shadow on a pair of Amal standard carbs 1949/54 and the plugs run for 300ish miles before fouling up. </p><p></p><p>Air screws are set for optimum running at tick over.</p><p></p><p>I had the same problem with the BSA Goldstar so I lowered the throttle slide needle one notch and hey presto no more running rich and I achieved a decent tick over. </p><p></p><p>I have not looked at a diagram of the Shadow carbs so don't know if the slide needle is graded with notches but that aside would consider lowering the needle to cure a rich running engine with the existing needle jet?</p></blockquote><p></p>
[QUOTE="moto8500, post: 160536, member: 4798"] This thread is for the carburetor aficionados amongst us. I am running the Shadow on a pair of Amal standard carbs 1949/54 and the plugs run for 300ish miles before fouling up. Air screws are set for optimum running at tick over. I had the same problem with the BSA Goldstar so I lowered the throttle slide needle one notch and hey presto no more running rich and I achieved a decent tick over. I have not looked at a diagram of the Shadow carbs so don't know if the slide needle is graded with notches but that aside would consider lowering the needle to cure a rich running engine with the existing needle jet? [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Throttle Slide Needle
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