tetly369 Posted February 16, 2014 Report Share Posted February 16, 2014 I have a ty175 and the carb is getting a bit worn, but I have a good ty125 carb, the main jet size is very different, can anyone tel me what size of main I should start with on the 125 carb when fitted to the 175. Cheers Tetly Link to comment Share on other sites More sharing options...
zerorev3rev4 Posted February 16, 2014 Report Share Posted February 16, 2014 is the inside bore venturi narrower ? what size jets are in the carbs Link to comment Share on other sites More sharing options...
tetly369 Posted February 22, 2014 Author Report Share Posted February 22, 2014 the carbs are the same 22mm and all the jets are the same apart from the main, 100 on 125 & 240 on the 175 but the 175 main jet is mounted outside the float bowl which I am sure affects the size required, Link to comment Share on other sites More sharing options...
tony27 Posted February 23, 2014 Report Share Posted February 23, 2014 Going on your description of the jet size & location the jets will be different shapes, the jet mounted in the float bowl will be round & the 1 that screws into the needle jet will be hexagonal, their numbering systems are different with 1 being diameter of the hole & the other being done on flow Link to comment Share on other sites More sharing options...
tetly369 Posted February 23, 2014 Author Report Share Posted February 23, 2014 the jets are the same hex type, the fuel is drawn through the jet in the opposite direction to normal. If you don't know the TY 175 setup you probably won't be able to help, I am going to stick it on today as is and see what happens. Link to comment Share on other sites More sharing options...
charlyxty Posted March 2, 2014 Report Share Posted March 2, 2014 I have a ty175 and the carb is getting a bit worn, but I have a good ty125 carb, the main jet size is very different, can anyone tel me what size of main I should start with on the 125 carb when fitted to the 175. Cheers Tetly Hi, The size you need is 130. Link to comment Share on other sites More sharing options...
tetly369 Posted March 5, 2014 Author Report Share Posted March 5, 2014 Hi, The size you need is 130. Thank you thats a great help! Link to comment Share on other sites More sharing options...
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