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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
ET48AS (ATD Assembly)
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<blockquote data-quote="ogrilp400" data-source="post: 158952" data-attributes="member: 88"><p>G'day Brad. The original advanced timing figures were about 39 degrees BTDC. The original ATDs' had a range of 17 degrees, this gives spark at about 4 degrees BTDC for starting and idling. Todays fuels burn quicker so that that advance figure can be bought back to about 34-35 degrees full advance. With a standard ATD this would give a starting and idling figure of TDC or even after TDC. By restricting the ATD range, this gives spark for starting and idling at about 3 degrees BTDC.</p></blockquote><p></p>
[QUOTE="ogrilp400, post: 158952, member: 88"] G'day Brad. The original advanced timing figures were about 39 degrees BTDC. The original ATDs' had a range of 17 degrees, this gives spark at about 4 degrees BTDC for starting and idling. Todays fuels burn quicker so that that advance figure can be bought back to about 34-35 degrees full advance. With a standard ATD this would give a starting and idling figure of TDC or even after TDC. By restricting the ATD range, this gives spark for starting and idling at about 3 degrees BTDC. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
ET48AS (ATD Assembly)
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