Phil C Posted February 2, 2023 Report Share Posted February 2, 2023 Afternoon all Anyone replaced their floats on 150CD carbs recently? I have just received a pair from a well known supplier and find significant differences with the ones being replaced. I have been assured these are the correct ones, and indeed with some manipulations I can probably get them to work. Main differences are; 1. Width of hinge is narrower on the replacement which allows sideways movement. I can address this by shimming with 3mm flat washers. 2. The kink within the originals hinge arm which allows the float to sit horizontal is missing on the replacements. This more tricky as the arm to activate the valve needs to be square to it. Any experience with this? thanks in advance Phil Link to comment Share on other sites More sharing options...
Pete Lewis Posted February 2, 2023 Report Share Posted February 2, 2023 the bend in your orig is unusual I take it you have fairly plain CDS thats got a choke valve on the front carb and tube to the rear no temp compensators or vac economy devices the twin arm float can be fitted upside down the side to side movement is not going to be a problem this site is aimed at TR but the settings and clues are common to all page 1/9 shoes the correct orientation Carburetors — Buckeye Triumphs Pete 1 Link to comment Share on other sites More sharing options...
dougbgt6 Posted February 2, 2023 Report Share Posted February 2, 2023 Yes, upside down is easy to do and looks OK, but will cause disaster! Doug 1 Link to comment Share on other sites More sharing options...
johny Posted February 2, 2023 Report Share Posted February 2, 2023 Yes the free to download Triumph workshop manual for Vitesse/GT6 shows the original float hinge plate also as flat... 1 Link to comment Share on other sites More sharing options...
Pete Lewis Posted February 2, 2023 Report Share Posted February 2, 2023 there could be a mystery as to why it was bent like wrong needle valve etc normal is just fit the pin and maybe a small set to the valve contact arm to get the 16/18 mm height from the cast face to base of float Pete 1 1 Link to comment Share on other sites More sharing options...
Phil C Posted February 2, 2023 Author Report Share Posted February 2, 2023 Thanks all for your comments. 4 hours ago, Pete Lewis said: Carburetors — Buckeye Triumphs Pete, thanks for that link, very useful. However my carbs are not like that shown and looking at all the pictures available from suppliers/parts book etc the floats do look as per my new ones. So I began to think may be my carbs are not the correct ones. This is mine with the old float installed and with the new one. In the latter case it is difficult to set the float height without some major bending. The parts drawing for 1600 carbs on Canleys website looks as per my original float. so I'm thinking may be my carbs are off a 1600 Vitesse. May be I have a 1600 engine too!! Link to comment Share on other sites More sharing options...
NonMember Posted February 2, 2023 Report Share Posted February 2, 2023 Yours are the earlier "thames barrier choke" type as fitted to Mk1 Vitesses. The problem you are having with the new floats is, I suspect, that you've fitted it upside down. 1 Link to comment Share on other sites More sharing options...
johny Posted February 2, 2023 Report Share Posted February 2, 2023 That is the same carb that was fitted to the 2L and is as shown in its manual. How about trying the new floats the other way up? Link to comment Share on other sites More sharing options...
Pete Lewis Posted February 2, 2023 Report Share Posted February 2, 2023 the metal arm should have the rivets facing you agree looks upside down the twin arm floats have been used on a base CD its not generally a problem i would turn it over and to get the height.bend the contact arm Pete Link to comment Share on other sites More sharing options...
Phil C Posted February 3, 2023 Author Report Share Posted February 3, 2023 20 hours ago, Pete Lewis said: the twin arm float can be fitted upside down 19 hours ago, dougbgt6 said: Yes, upside down is easy to do and looks OK, but will cause disaster 14 hours ago, NonMember said: The problem you are having with the new floats is, I suspect, that you've fitted it upside down. 14 hours ago, johny said: How about trying the new floats the other way up? 14 hours ago, Pete Lewis said: i would turn it over and to get the height.bend the contact arm Slightly embarrassed for being such a plonker! 🤓 All sorted now. Thanks again Link to comment Share on other sites More sharing options...
johny Posted February 3, 2023 Report Share Posted February 3, 2023 To be fair I think that float can be used either way up in different applications which could be a reason for it having two contact arms. In the Buckeye photo it is indeed installed the way you first had it... Link to comment Share on other sites More sharing options...
dougbgt6 Posted February 3, 2023 Report Share Posted February 3, 2023 3 hours ago, Phil C said: Slightly embarrassed for being such a plonker! 🤓 Don't be embarrassed, but don't ask me how I know they can be fitted upside down! Doug 1 Link to comment Share on other sites More sharing options...
daverclasper Posted February 5, 2023 Report Share Posted February 5, 2023 On 02/02/2023 at 20:25, Pete Lewis said: the metal arm should have the rivets facing you agree looks upside down I can't see which rivets you mean Pete? Link to comment Share on other sites More sharing options...
johny Posted February 5, 2023 Report Share Posted February 5, 2023 Yes the type of float Phil has are the unsinkable (solid) ones so the metal arms arent rivetted but embedded in them. There do have a couple of holes which look a bit like rivets though.... Link to comment Share on other sites More sharing options...
Phil C Posted February 6, 2023 Author Report Share Posted February 6, 2023 Now installed the correct way up. I did use a number of washers on the hinge pin to stop the sideways movement as the inside of the float could rub against the jet housing. Might not be a problem but I thought better if it doesn't. I also cut off the redundant tab as the tip of it caught on float bowl. Link to comment Share on other sites More sharing options...
johny Posted February 6, 2023 Report Share Posted February 6, 2023 That should do the job. Out of interest what was wrong with the old floats as theyre normally pretty bomb proof even after 50 odd years? Link to comment Share on other sites More sharing options...
Phil C Posted February 7, 2023 Author Report Share Posted February 7, 2023 15 hours ago, johny said: Out of interest what was wrong with the old floats One did have a small leak. It still worked but I could hear it swishing around inside. But as you identified these are now unsinkable!🤔 ……wasn’t the Titanic also dubbed “unsinkable “? Link to comment Share on other sites More sharing options...
Pete Lewis Posted February 7, 2023 Report Share Posted February 7, 2023 well if the Titanic had strombergs it might have survived Ha ! Pete 1 Link to comment Share on other sites More sharing options...
dougbgt6 Posted February 7, 2023 Report Share Posted February 7, 2023 SUs, I knew it! Doug Link to comment Share on other sites More sharing options...
Peter Truman Posted February 7, 2023 Report Share Posted February 7, 2023 On 07/02/2023 at 04:47, Phil C said: Now installed the correct way up. I did use a number of washers on the hinge pin to stop the sideways movement as the inside of the float could rub against the jet housing. Might not be a problem but I thought better if it doesn't. I also cut off the redundant tab as the tip of it caught on float bowl. Interesting need for washers to centralize float I've never had to do that? is that a necessity with your unsinkable floats, my very old solid material version is below Link to comment Share on other sites More sharing options...
Phil C Posted February 8, 2023 Author Report Share Posted February 8, 2023 11 hours ago, Peter Truman said: is that a necessity with your unsinkable floats Probably not but it just seemed better that they didn't touch and it was simple to do at the time. It would appear the latest floats have hinges much narrower than the locating lugs on the carb body I guess to suit other versions? Link to comment Share on other sites More sharing options...
johny Posted February 8, 2023 Report Share Posted February 8, 2023 yes check that one in the Buckeye article above, much narrow lug spacing because it looks like the carb casting is prepared for float valve installation on either side to suit different applications... Link to comment Share on other sites More sharing options...
Pete Lewis Posted February 8, 2023 Report Share Posted February 8, 2023 like float gaskets there is a lot of quiet evolution over the many years of production there will be subtle changes get the wrong one and the corners become a leaker various bits look the same but there is a often a quirky difference pete Link to comment Share on other sites More sharing options...
johny Posted February 8, 2023 Report Share Posted February 8, 2023 yes and then after market manufacturers come along and for it to be economically viable have to try n make one spare that fits all... Link to comment Share on other sites More sharing options...
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