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General Chat (Vincent Related)
Norvin Single race bike first run
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<blockquote data-quote="greg brillus" data-source="post: 127344" data-attributes="member: 597"><p>Hi there Bill, Yes I recon I could attack the needle with an angle grinder and it would be fine......... I took some measurements this afternoon, so the needle is 4 mm in diameter, and at the correct distance down the taper on full throttle it measures 2.7 mm........even with the needle wound upward (richer) so that about a 1/2 inch of thread was showing, the same point on the needle would be 2.5 mm plus with the float level raised quite a bit higher than where it says in the instruction sheet.........Ron told me that for sprinting and speedway they don't use a float bowl........I could try that, but I'm worried about the possibility of a hydraulic lock if too much fuel runs down the intake, if I forgot to turn the fuel tap off after a run........... I will give Ron a call and tell him what is happening and see what he suggests....... If I had some spare needles I wouldn't hesitate to modify one to suit but I don't have any.......... I could tell when it was a bit rich under acceleration as I could feel the cold fuel from the carb hitting my leg...........<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" />.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 127344, member: 597"] Hi there Bill, Yes I recon I could attack the needle with an angle grinder and it would be fine......... I took some measurements this afternoon, so the needle is 4 mm in diameter, and at the correct distance down the taper on full throttle it measures 2.7 mm........even with the needle wound upward (richer) so that about a 1/2 inch of thread was showing, the same point on the needle would be 2.5 mm plus with the float level raised quite a bit higher than where it says in the instruction sheet.........Ron told me that for sprinting and speedway they don't use a float bowl........I could try that, but I'm worried about the possibility of a hydraulic lock if too much fuel runs down the intake, if I forgot to turn the fuel tap off after a run........... I will give Ron a call and tell him what is happening and see what he suggests....... If I had some spare needles I wouldn't hesitate to modify one to suit but I don't have any.......... I could tell when it was a bit rich under acceleration as I could feel the cold fuel from the carb hitting my leg...........:). [/QUOTE]
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Norvin Single race bike first run
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