wheredahoesatracing Posted February 16, 2016 Report Posted February 16, 2016 I have a set of 40mm keihin alcohol carbs and im wanting to find out what my dump tubes are drilled at. Can someone tell me how and what i need to measure them? Sent from my SM-N910P using Tapatalk Quote
trickedcarbine Posted February 17, 2016 Report Posted February 17, 2016 (edited) There are micro bore gauges that machinists use, however it would be quite the chunk of change to spend to measure some dump tubes. Easiest way would be to find a precision drill set that machinists use and flip to the rack that is numbered, not lettered. If all you can get is lettered, there are charts out there that show what size each letter bit is. Most of these things are drilled in the .115-.130 range. Just start dropping them in till they will no longer fit. Edited February 17, 2016 by trickedcarbine Quote
Bennett131 Posted February 17, 2016 Report Posted February 17, 2016 There are micro bore gauges that machinists use, however it would be quite the chunk of change to spend to measure some dump tubes. Easiest way would be to find a precision drill set that machinists use and flip to the rack that is numbered, not lettered. If all you can get is lettered, there are charts out there that show what size each letter bit is. Most of these things are drilled in the .115-.130 range. Just start dropping them in till they will no longer fit.This^^^ of get a numbered or lettered drill, post it here and I will give you the decimal/fraction of an inch associated with it. Quote
registered user Posted February 17, 2016 Report Posted February 17, 2016 gauge pin would probly be easiest way. find a machine shop with gaug pin set and they probly do it for free Quote
trickedcarbine Posted February 17, 2016 Report Posted February 17, 2016 gauge pin would probly be easiest way. find a machine shop with gaug pin set and they probly do it for freeYes^ gauge pin... Why the fuck could I not recall that. Couldn't think of what to call it other then a micro bore gauge. Teuche' Quote
Big Mike NY Posted February 17, 2016 Report Posted February 17, 2016 Here NICE i remember that chart from machine shop in high school! The fucking bongs we built in that class were mind boggling! 1 Quote
RadarRacing Posted February 20, 2016 Report Posted February 20, 2016 Darren , just remove the main and stick the largest drill bit in it that fits tightly and measure it with a mic or look up what size the bit is in inches. Like .116 , .122 etc. .122 is close to 1/8th inch. Quote
wheredahoesatracing Posted February 20, 2016 Author Report Posted February 20, 2016 Thanks radar i been kinda playing with all the replies i got and they are either. 120 or .122s Sent from my SM-N910P using Tapatalk Quote
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