grib Posted January 2, 2005 Report Share Posted January 2, 2005 (edited) The Gas Gas handbook shows the float height being measured at 18.5mm, does anyone know whether this should be measured with the spring loaded pin in the float needle compressed or not? Also the Gas Gas Museum site says the float valve operating arms should be parallel with the gasket surface, mine are not parallel when the spring is compressed or not compressed. What settings for float height is anyone using succesfully, and how do you measure it?? Edited January 2, 2005 by Grib Quote Link to comment Share on other sites More sharing options...
spokes Posted January 2, 2005 Report Share Posted January 2, 2005 (edited) Good Question ! I was wondering this myself this morning when I had my Carb in bits ? Even the Dellorto website does'nt tell you if the fuel valve pin needs to be compressed when the float arms are set ! Edited January 2, 2005 by Spokes Quote Link to comment Share on other sites More sharing options...
spokes Posted January 2, 2005 Report Share Posted January 2, 2005 Thats the way I set mine up this morning so should be OK. Quote Link to comment Share on other sites More sharing options...
nigel dabster Posted January 3, 2005 Report Share Posted January 3, 2005 Top fun have a nice ally float height checker and I have used it with some success. With the dellorto just tip it upside down and it measures 18.5 exactly just simply natural level with the bowl off. As a one off you can just cut a sheet ally to size or a bit of cardboard. They rarely move once set. Quote Link to comment Share on other sites More sharing options...
grib Posted January 3, 2005 Author Report Share Posted January 3, 2005 Nigel, it sounds like your floats are attached to the arm that closes the needle valve. My bike has a PHBL carb on it with separate floats sliding up & down pins in the float bowl, the arm that the floats act on is not parallel to the gasket surface when it is resting on the needle so you can measure different heights all along its length. Quote Link to comment Share on other sites More sharing options...
nigel dabster Posted January 3, 2005 Report Share Posted January 3, 2005 Not sure what you are describing there, but the levels are 18.5 and when you do it its obvious, and bothof the floats should be the same andshut off the fuel inlet does that make sense? Quote Link to comment Share on other sites More sharing options...
grib Posted January 3, 2005 Author Report Share Posted January 3, 2005 It looks like this; Quote Link to comment Share on other sites More sharing options...
nigel dabster Posted January 3, 2005 Report Share Posted January 3, 2005 Right the brass strips should be equal in vertical height from the machined flat bowl mating surface, where the gasket goes. So if you had an upturned u shape it would sit where the gasket does and read 18.5 up to the 2 brass bits. Floats don't matter as its measuring the shut off point. Any help? Quote Link to comment Share on other sites More sharing options...
t-shock 250 Posted January 3, 2005 Report Share Posted January 3, 2005 Those plastic takeaway cartons really come in handy for putting all your carb bits in! Quote Link to comment Share on other sites More sharing options...
grib Posted January 3, 2005 Author Report Share Posted January 3, 2005 I find one of the most rewarding parts of motorcycle maintenance is eating all the takeaways necessary to provide the empty cartons Quote Link to comment Share on other sites More sharing options...
grib Posted January 3, 2005 Author Report Share Posted January 3, 2005 My brass bits aren't parallel with the gasket surface, one end is 1.5mm higher than the other, is that wrong? Quote Link to comment Share on other sites More sharing options...
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