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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
1951 Comet Carburation
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<blockquote data-quote="Monkeypants" data-source="post: 120766" data-attributes="member: 2708"><p>An observation regarding Mikuni VM equipped Vincents- after many thousands of miles touring alongside Vincents using VMs, it's undeniable that those bikes are tricky on tepid restart.</p><p>There are a bunch of these here on the West coast and so far every bike I've observed that is fitted with VMs, including my own, has this problem. So there's often a whole lotta kicking going on after lunch on restart of the VM equipped bikes. Not always, but you just never know. Cold start is generally good as is hot restart, tepid, not so much, although the problem is intermittent.</p><p>The other issue with the Mikunis is sticking floats. I've had two new sets on the bike and considerable problems with sticking floats, both sets. I've heard other riders complain of the same.This is with inline fuel filters fitted, so no gunk is getting to the carbs.</p><p>Other than that, the VMs work well, nice idle, seem to give very good fuel economy for most.</p><p>The Amal Premieres on the other Rapide work as well as the Mikunis for running and do not have the tepid restart problem.</p><p>Here is a photo of the anodized slide at 15,000 miles. The carb bore is polishing nicely.</p><p> I don't think I'll be wearing these carbs out!</p><p></p><p>Glen</p></blockquote><p></p>
[QUOTE="Monkeypants, post: 120766, member: 2708"] An observation regarding Mikuni VM equipped Vincents- after many thousands of miles touring alongside Vincents using VMs, it's undeniable that those bikes are tricky on tepid restart. There are a bunch of these here on the West coast and so far every bike I've observed that is fitted with VMs, including my own, has this problem. So there's often a whole lotta kicking going on after lunch on restart of the VM equipped bikes. Not always, but you just never know. Cold start is generally good as is hot restart, tepid, not so much, although the problem is intermittent. The other issue with the Mikunis is sticking floats. I've had two new sets on the bike and considerable problems with sticking floats, both sets. I've heard other riders complain of the same.This is with inline fuel filters fitted, so no gunk is getting to the carbs. Other than that, the VMs work well, nice idle, seem to give very good fuel economy for most. The Amal Premieres on the other Rapide work as well as the Mikunis for running and do not have the tepid restart problem. Here is a photo of the anodized slide at 15,000 miles. The carb bore is polishing nicely. I don't think I'll be wearing these carbs out! Glen [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
1951 Comet Carburation
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