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General Chat (Vincent Related)
Amal carbs
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<blockquote data-quote="Tom Gaynor" data-source="post: 22095" data-attributes="member: 4034"><p>I bought a new Amal Concentric Mk I for my Sunbeam S7. It transformed the bike. I had however to use fine emery to stop its habit of sticking open, mercifully only when I opened the throttle too much when starting. It never stuck when running.</p><p>There is good reason to believe that both the Monobloc and Mk I are crap built down to a price BSA found acceptable, and that only with the Mark II did Amal make a carb better than the 276 / 289. None of these are as good as a TT or a GP, not built down to a price. Or for that matter, a Mikuni.</p><p>Kevin Trail of Alverstoke Restorations, 02392 580 708 after 1630, will rebore and resleeve your original carbs for about £80 the pair. That is half the price of a pair of new carbs. It works: they come back good as new. When I had my Shadow carbs done I had them back within a week. I won't bore you with lies about a 75 rpm tickover. But about 750 is OK with me. It now makes the proper Ogri Pocka-pocka noise. </p><p>The possible downside is that the slide is now oversize, so when the resleeve wears out, I will need to buy new carbs, unless Kevin can bore them to +40.</p><p>This may be a problem I'll leave to the next generation.</p></blockquote><p></p>
[QUOTE="Tom Gaynor, post: 22095, member: 4034"] I bought a new Amal Concentric Mk I for my Sunbeam S7. It transformed the bike. I had however to use fine emery to stop its habit of sticking open, mercifully only when I opened the throttle too much when starting. It never stuck when running. There is good reason to believe that both the Monobloc and Mk I are crap built down to a price BSA found acceptable, and that only with the Mark II did Amal make a carb better than the 276 / 289. None of these are as good as a TT or a GP, not built down to a price. Or for that matter, a Mikuni. Kevin Trail of Alverstoke Restorations, 02392 580 708 after 1630, will rebore and resleeve your original carbs for about £80 the pair. That is half the price of a pair of new carbs. It works: they come back good as new. When I had my Shadow carbs done I had them back within a week. I won't bore you with lies about a 75 rpm tickover. But about 750 is OK with me. It now makes the proper Ogri Pocka-pocka noise. The possible downside is that the slide is now oversize, so when the resleeve wears out, I will need to buy new carbs, unless Kevin can bore them to +40. This may be a problem I'll leave to the next generation. [/QUOTE]
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Amal carbs
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