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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Facts about AMAL Mk1 carbs
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<blockquote data-quote="Howard" data-source="post: 34325" data-attributes="member: 271"><p>Chrislaun,</p><p></p><p>I had a similar problem with a friend's Comet earlier in the year. New Mk1 Conncetric just couldn't be tuned to run slowly (Dunno why he asked me to look, I don't know what "slowly" is). The best/only setting was with the air screw fully in! After lots of head scratching, and comments like "flippin eck" I eventually discovered it had TWO pilot jets, one where the 4 stroke bush goes, and one where the 2 stroke jet goes. I took one out (don't remember which, but probably the "2 stroke one" and like magic we had an adjustable carb.</p><p></p><p>Roy - best not to argue with manufacturers, I think they're scared of litigation these days. The proof seems to be that on their new range they've got an adjustable float, and a removable pilot valve, which are the most common compaints from tuners. The other is the tube that sticks up into the choke (forget the name) cutting the back away (as per Norton carbs) makes a noticable difference, but I think Amal/Burlen list this as an option.</p><p></p><p>H</p></blockquote><p></p>
[QUOTE="Howard, post: 34325, member: 271"] Chrislaun, I had a similar problem with a friend's Comet earlier in the year. New Mk1 Conncetric just couldn't be tuned to run slowly (Dunno why he asked me to look, I don't know what "slowly" is). The best/only setting was with the air screw fully in! After lots of head scratching, and comments like "flippin eck" I eventually discovered it had TWO pilot jets, one where the 4 stroke bush goes, and one where the 2 stroke jet goes. I took one out (don't remember which, but probably the "2 stroke one" and like magic we had an adjustable carb. Roy - best not to argue with manufacturers, I think they're scared of litigation these days. The proof seems to be that on their new range they've got an adjustable float, and a removable pilot valve, which are the most common compaints from tuners. The other is the tube that sticks up into the choke (forget the name) cutting the back away (as per Norton carbs) makes a noticable difference, but I think Amal/Burlen list this as an option. H [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Facts about AMAL Mk1 carbs
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