Dan16v Posted July 7, 2015 Share Posted July 7, 2015 Evening all, I have finally traced the cause of my needle binding up on one of my CD150 carbs on the Mk1 GT6, the carb top/cover must be distorted as it still does it with new needles and jets and goes away when you swap them over between carbs, if you back one of the screws off half a turn it goes away.The question is, where can I get a replacement? its the early bottom mixture adjustment type (3092 from memory) and Ebay hasn't come up trumps yet and I can't see any new parts being available. Quote Link to comment Share on other sites More sharing options...
Steve AKA vitessesteve Posted July 7, 2015 Share Posted July 7, 2015 I can see some 2nd carbs on eBay: http://www.ebay.co.uk/bhp/stromberg-carburettor?clk_rvr_id=862891840666&rmvSB=trueAlternately ask a Triumph breaker such as Spitfire Graveyard or Wins International.From memory the diaphragms have a tag/locating lump on 1 side, have you got it the right way round? Quote Link to comment Share on other sites More sharing options...
Steve AKA vitessesteve Posted July 7, 2015 Share Posted July 7, 2015 And also a pair of new carbs: http://www.ebay.co.uk/itm/Stro.....venger-/221818071978 Quote Link to comment Share on other sites More sharing options...
byakk0 Posted July 8, 2015 Share Posted July 8, 2015 in playing with my carbs recently I noticed the same thing. Get a screw on the cover too tight and the needle jams up...turns out I did have a bent needle. Thank goodness for spares!+1 on checking the little tab is in the slot. It's on the underside of the outer rim.See this photo, although it is inverted. Not sure if yours will have the locator tab on the inner ring. Quote Link to comment Share on other sites More sharing options...
thescrapman Posted July 8, 2015 Share Posted July 8, 2015 If you have the bottom adjusters, have you centered the jets fully??Remove top cover, wind jet up until level with the bridge, loosen jet holder, putting finger in the orifice, lift and drop the piston a few times.Tighten it all up, lower jet 2 full turns (for starters) and Bobs your uncle.Of course if you have done all that I do not have a clue.CheersColin Quote Link to comment Share on other sites More sharing options...
Dan16v Posted July 8, 2015 Author Share Posted July 8, 2015 Quoted from thescrapman If you have the bottom adjusters, have you centered the jets fully??Remove top cover, wind jet up until level with the bridge, loosen jet holder, putting finger in the orifice, lift and drop the piston a few times.Tighten it all up, lower jet 2 full turns (for starters) and Bobs your uncle.Of course if you have done all that I do not have a clue.CheersColin Yep, done all that, new needles and jet holder, a friends dad who used to tune triumphs for a living looked at it and said its strange, he centred the jets and balanced the carbs up as well. if you take the one that jams and put it onto the one that doesn't the jaming follows the top cap so the needles are all centre its something wrong with this top Quote Link to comment Share on other sites More sharing options...
Dan16v Posted July 8, 2015 Author Share Posted July 8, 2015 Quoted from byakk0 in playing with my carbs recently I noticed the same thing. Get a screw on the cover too tight and the needle jams up...turns out I did have a bent needle. Thank goodness for spares!+1 on checking the little tab is in the slot. It's on the underside of the outer rim.See this photo, although it is inverted. Not sure if yours will have the locator tab on the inner ring. Yes, there is a cut out in the top of the carb body for this, all checked and its all seated correctly etc Quote Link to comment Share on other sites More sharing options...
Dan16v Posted July 8, 2015 Author Share Posted July 8, 2015 Quoted from vitessesteve I can see some 2nd carbs on eBay: http://www.ebay.co.uk/bhp/stromberg-carburettor?clk_rvr_id=862891840666&rmvSB=trueAlternately ask a Triumph breaker such as Spitfire Graveyard or Wins International.From memory the diaphragms have a tag/locating lump on 1 side, have you got it the right way round? thanks, will give them a try. None of the ones on Ebay have the right tops, they look like later carbs which have an extra round lump on the side of the casting and the writing on top is different. Quote Link to comment Share on other sites More sharing options...
cook1e Posted July 9, 2015 Share Posted July 9, 2015 Worth trying the Carburetor Hospital, they have an Aladdin's cave of spares for all types of carbs. http://www.carburettorspecialists.com/I went there many years ago to see about having my GT6 carbs reconditioned and walked out with a brand new set of new old stock carbs for a GT6 that they had in stock all set up and ready to go, didn't even need tuning when I fitted them! Quote Link to comment Share on other sites More sharing options...
JSBulmer Posted July 9, 2015 Share Posted July 9, 2015 DanHave you got a picture of what you need? I have a box of old carbureators (probably 10 or more) and various parts. If I know what to look for I may be able to help out. Quote Link to comment Share on other sites More sharing options...
Dan16v Posted July 11, 2015 Author Share Posted July 11, 2015 Quoted from JSBulmer DanHave you got a picture of what you need? I have a box of old carbureators (probably 10 or more) and various parts. If I know what to look for I may be able to help out. cheers, here are a couple of pictures of what I'm after if you have anything like that Quote Link to comment Share on other sites More sharing options...
Dan16v Posted July 11, 2015 Author Share Posted July 11, 2015 Quoted from JSBulmer DanHave you got a picture of what you need? I have a box of old carbureators (probably 10 or more) and various parts. If I know what to look for I may be able to help out. Quote Link to comment Share on other sites More sharing options...
JSBulmer Posted July 11, 2015 Share Posted July 11, 2015 I will have a look this weekend and let you know. Quote Link to comment Share on other sites More sharing options...
JSBulmer Posted July 11, 2015 Share Posted July 11, 2015 I have 2 different models - 1 stamped CD 150 as yours and one without the 150 stamp. Pics included. Let me know which you want, or whether you want one of each. Did you also need the screws? Quote Link to comment Share on other sites More sharing options...
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