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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Amal Carburettors Dripping Badly
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<blockquote data-quote="A Nut" data-source="post: 154508" data-attributes="member: 2005"><p>I would not try unscrewing the nut under the jet block if the carb is still bolted to the manifold. You will probably split the stub. Better to take the carb off the bike, Put it in boiling water, that may help break the seal. find a good fitting ring spanner or socket and mount in the vice. Best to put the banjo nut back into place then with the jet block nut in the spanner put something like a piece of broom handle through the venturi and unscrew the carb body from the nut. I have never failed to get one apart with this method but be very careful not to put any strain on the stub. As regards the dripping your needles may not be seating properly. Try gentle grinding by hand using some jewellers rouge or Brasso on the seat but make sure you keep the needle central and upright. The Mazak faces where the fire washer fit on the float chamber arm are very often corroded and need careful dressing with a fine file. Using new washers (get a kit from Burlen or Surrey Cycles) coat the washers with Wellseal (nothing else will do, it's the only one that's petrol proof) let them go tacky and reassemble. By the way do the same with the washer inside the bottom nut where it abuts the jet block. Good luck!</p><p>Brian</p></blockquote><p></p>
[QUOTE="A Nut, post: 154508, member: 2005"] I would not try unscrewing the nut under the jet block if the carb is still bolted to the manifold. You will probably split the stub. Better to take the carb off the bike, Put it in boiling water, that may help break the seal. find a good fitting ring spanner or socket and mount in the vice. Best to put the banjo nut back into place then with the jet block nut in the spanner put something like a piece of broom handle through the venturi and unscrew the carb body from the nut. I have never failed to get one apart with this method but be very careful not to put any strain on the stub. As regards the dripping your needles may not be seating properly. Try gentle grinding by hand using some jewellers rouge or Brasso on the seat but make sure you keep the needle central and upright. The Mazak faces where the fire washer fit on the float chamber arm are very often corroded and need careful dressing with a fine file. Using new washers (get a kit from Burlen or Surrey Cycles) coat the washers with Wellseal (nothing else will do, it's the only one that's petrol proof) let them go tacky and reassemble. By the way do the same with the washer inside the bottom nut where it abuts the jet block. Good luck! Brian [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Amal Carburettors Dripping Badly
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