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Tech. Advice: Series 'A' 500cc/1000cc Bikes
Series "A" Twin front carb float level
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<blockquote data-quote="Robert Watson" data-source="post: 87810" data-attributes="member: 38"><p>I guess I am just lucky...........</p><p></p><p>When I built my A twin it came with 1.3 carbs and they were completely trashed. I ended up giving them to Glyn Baxter for his very original restoration (1936 show bike). My bike had been owned by 6 different teenage boys from the mid 50's to the early 60's so you can just imagine. </p><p></p><p>Anyway I had a pair of worn Shadow carbs, so stuck them on. They worked OK but of course the idle was crap. To make a long story short, I bought a pair of new shadow carbs, less floats, and just stuck them on. I ended up swapping the front slide out for a bigger cutaway as shown for an A Rapide in Richardson. It starts well and runs well, and idles just fine. I have never changed a thing on the jet blocks. It could be I am just insensitive and/or just lucky. </p><p>You are right about them barely squeezing in there. I have to take the bell mouth off the front one to get it to go on and then fiddle it past the valve spring and screw it on after. And you better hope you hit the idle correctly as it is near impossible to change once the tank is installed.</p></blockquote><p></p>
[QUOTE="Robert Watson, post: 87810, member: 38"] I guess I am just lucky........... When I built my A twin it came with 1.3 carbs and they were completely trashed. I ended up giving them to Glyn Baxter for his very original restoration (1936 show bike). My bike had been owned by 6 different teenage boys from the mid 50's to the early 60's so you can just imagine. Anyway I had a pair of worn Shadow carbs, so stuck them on. They worked OK but of course the idle was crap. To make a long story short, I bought a pair of new shadow carbs, less floats, and just stuck them on. I ended up swapping the front slide out for a bigger cutaway as shown for an A Rapide in Richardson. It starts well and runs well, and idles just fine. I have never changed a thing on the jet blocks. It could be I am just insensitive and/or just lucky. You are right about them barely squeezing in there. I have to take the bell mouth off the front one to get it to go on and then fiddle it past the valve spring and screw it on after. And you better hope you hit the idle correctly as it is near impossible to change once the tank is installed. [/QUOTE]
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Tech. Advice: Series 'A' 500cc/1000cc Bikes
Series "A" Twin front carb float level
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