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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Amal 289 Throttle Slide Cutaways
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<blockquote data-quote="Chris S" data-source="post: 81365" data-attributes="member: 3239"><p>Greg, think I misunderstand a detail in your reply. You say "On the number 4 you need to machine off 25 to 30 thou off the flat base of the slide, this will lower the slide within the carb body. On 3 slide you need to machine the cutaway taller at the front by half the amount"</p><p>If I want to increase the cutaway on a 3 to 3.5, would I not need to remove 1/32" as a 3 cutaway is 3/16" (6/32) high and a 4 is 1/4" (8/32) high therefore making a 3.5 equal 7/32"high? This would require me to remove 25 to 30 thou as per your reduction on base of the 4 slide.</p><p>Also, if removing material off the base, does this then create the need raise the needle to compensate for it now sitting lower, or is the amount too little to worry about?</p><p>Chris</p></blockquote><p></p>
[QUOTE="Chris S, post: 81365, member: 3239"] Greg, think I misunderstand a detail in your reply. You say "On the number 4 you need to machine off 25 to 30 thou off the flat base of the slide, this will lower the slide within the carb body. On 3 slide you need to machine the cutaway taller at the front by half the amount" If I want to increase the cutaway on a 3 to 3.5, would I not need to remove 1/32" as a 3 cutaway is 3/16" (6/32) high and a 4 is 1/4" (8/32) high therefore making a 3.5 equal 7/32"high? This would require me to remove 25 to 30 thou as per your reduction on base of the 4 slide. Also, if removing material off the base, does this then create the need raise the needle to compensate for it now sitting lower, or is the amount too little to worry about? Chris [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Amal 289 Throttle Slide Cutaways
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