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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Need Advice, can't keep an idle (intermittently) approaching or at a stop with New Amal 276's
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<blockquote data-quote="greg brillus" data-source="post: 132523" data-attributes="member: 597"><p>Thanks Bill....... On the 229/289 new carb's, I modify them before installing them to any bike now........I always check the idle circuits and usually trim the slides from a number 4 to about a 3 1/2 to get a bit more fuel in to them.......Going to a number 3 will be too rich........It might seem stupidly obvious, but I also pre set the throttle opening on both carbs before I install them, so the opening at the front/engine side of the slide is about 12 to 13 mm in width.......This is easier to explain than to quote a height figure.........Another simple tip for checking that the carb/bowl is level, with the bike vertical, either on a bike lift or on the rear stand........Stand in front of or behind the bike about 4 or 5 feet and look along the side of the bike down level with the carby and you will quickly see if the bowl is up or down........All these simple checks will help in getting a quicker result with the tune up process........Running any type of air filter will richen the mixture as well........This can be good and bad.......The foam ones that slip over the bell mouths from the VOC spares co work well and probably cause the least restriction, the looks might be a bit ordinary, but any air filter on a Vincent look a bit out of place. I put some lovely paper element air filters on my Rapide years ago, it was completely unrideable........Would not have even made it out of the shed............</p></blockquote><p></p>
[QUOTE="greg brillus, post: 132523, member: 597"] Thanks Bill....... On the 229/289 new carb's, I modify them before installing them to any bike now........I always check the idle circuits and usually trim the slides from a number 4 to about a 3 1/2 to get a bit more fuel in to them.......Going to a number 3 will be too rich........It might seem stupidly obvious, but I also pre set the throttle opening on both carbs before I install them, so the opening at the front/engine side of the slide is about 12 to 13 mm in width.......This is easier to explain than to quote a height figure.........Another simple tip for checking that the carb/bowl is level, with the bike vertical, either on a bike lift or on the rear stand........Stand in front of or behind the bike about 4 or 5 feet and look along the side of the bike down level with the carby and you will quickly see if the bowl is up or down........All these simple checks will help in getting a quicker result with the tune up process........Running any type of air filter will richen the mixture as well........This can be good and bad.......The foam ones that slip over the bell mouths from the VOC spares co work well and probably cause the least restriction, the looks might be a bit ordinary, but any air filter on a Vincent look a bit out of place. I put some lovely paper element air filters on my Rapide years ago, it was completely unrideable........Would not have even made it out of the shed............ [/QUOTE]
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Forums: Public Access
Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Need Advice, can't keep an idle (intermittently) approaching or at a stop with New Amal 276's
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