Robin Posted June 13, 2020 Report Share Posted June 13, 2020 more advice needed... I’ve got a spare set of CD150S carbs that I’d like to refurbish. I checked the stamp on the needle of one of the carbs and it reads 6AC - is that the correct needle for a standard Mk2 vitesse engine? I undid the piston grub screw on the second carb but the needle simple won’t budge - even with quite a lot of force. I’m going to replace the needle anyway so don’t mind damaging it but are there any tips on how to get it out? Thanks Link to comment Share on other sites More sharing options...
Pete Lewis Posted June 13, 2020 Report Share Posted June 13, 2020 https://www.canleyclassics.com/?catalogue=triumph-vitesse&diagram=triumph-vitesse-mkii-2-litre-stromberg-carburettors Hi Robin 6AC is the std needle for your mk2 Vit if you dont mind damaging the needle grip in a vice and quietly tap the piston body off. why do you need new ones ?? Pete Pete Link to comment Share on other sites More sharing options...
Robin Posted June 13, 2020 Author Report Share Posted June 13, 2020 Thanks Pete- any ideas on how to get the needle out? Link to comment Share on other sites More sharing options...
Robin Posted June 13, 2020 Author Report Share Posted June 13, 2020 Sorry Pete - didn’t read you post properly. The needle in the second carb looks slightly bent so needs replacing. Link to comment Share on other sites More sharing options...
Robin Posted June 13, 2020 Author Report Share Posted June 13, 2020 Pete - got the needle out as per your suggestion and interestingly it’s stamped 6AG. Wonder what different having two different needles would have made? Link to comment Share on other sites More sharing options...
Iain T Posted June 13, 2020 Report Share Posted June 13, 2020 https://images.app.goo.gl/XbnVTzkGdbJur4Sd6 If it works this shows the difference between 6AC and 6AG. The AG is slightly thicker so a leaner needle. Burlen sell needles and obviously they should be the same spec front and back. Iain Link to comment Share on other sites More sharing options...
Robin Posted June 13, 2020 Author Report Share Posted June 13, 2020 4 minutes ago, Iain T said: https://images.app.goo.gl/XbnVTzkGdbJur4Sd6 If it works this shows the difference between 6AC and 6AG. The AG is slightly thicker so a leaner needle. Burlen sell needles and obviously they should be the same spec front and back. Iain So if both carbs have different needles presumably this would make balancing them harder? Link to comment Share on other sites More sharing options...
Iain T Posted June 13, 2020 Report Share Posted June 13, 2020 Oooh yeah, needles should be the same. As Pete said 6AC are the standard needles for a mk2. Iain Link to comment Share on other sites More sharing options...
Pete Lewis Posted June 13, 2020 Report Share Posted June 13, 2020 sorry should have looked at them last week when we twiddled them yes odd needle is not a good start you should be able to swap/replace needles the mixture adjustment we set will stay the same as the idle size of the needle at idle is same on all needles so change pop it all back watch out for the diaphragm lugs and see how she goes Pete Link to comment Share on other sites More sharing options...
Robin Posted June 14, 2020 Author Report Share Posted June 14, 2020 12 hours ago, Pete Lewis said: sorry should have looked at them last week when we twiddled them yes odd needle is not a good start you should be able to swap/replace needles the mixture adjustment we set will stay the same as the idle size of the needle at idle is same on all needles so change pop it all back watch out for the diaphragm lugs and see how she goes Pete Hi Pete - the CD150S are a spare set, not the ones you helped set up. Link to comment Share on other sites More sharing options...
Pete Lewis Posted June 14, 2020 Report Share Posted June 14, 2020 phew!!! Ha got me worried for a moment Pete Link to comment Share on other sites More sharing options...
Robin Posted June 15, 2020 Author Report Share Posted June 15, 2020 Trying to find a carb link pipe - part number 517868. Canley's says it's no longer available and no one else seems to stock it. Any ideas where to find one? Link to comment Share on other sites More sharing options...
Pete Lewis Posted June 15, 2020 Report Share Posted June 15, 2020 this just links the front choke to the rear carb suggest you use any decent fuel hose the original was a often a clear tube , but some 1/4" R 9 will be fine Pete Link to comment Share on other sites More sharing options...
Robin Posted June 15, 2020 Author Report Share Posted June 15, 2020 2 hours ago, Pete Lewis said: this just links the front choke to the rear carb suggest you use any decent fuel hose the original was a often a clear tube , but some 1/4" R 9 will be fine Pete Great - thanks Pete Link to comment Share on other sites More sharing options...
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