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XV750 Diaphragm
Question: I need a Diaphragm, it is hard to get. Do you know or can direct me to any one? We have moulded one for now, but don’t know how long it will last. My bike is in great shape & clean as, I have done a lot of work to it. That is all I need now, I ride alot and luv it, Cheers! Rosie {Rosie, Victoria, Australia - 1981 XV750 Yamaha Virago}
Answer:Rosie, I am not sure if you mean the petcock or carb diaphragm on the XV750, but here is the information I have for both.
Petcock DiaphragmFuel petcock diaphragm is available from K&L Supply located in California, US. K&L part number 18-6634.Yamaha also sells it included in a kit of 3 pieces, part number 10L-W0092-00-00, Fuel Cock Valve Set. This set also fits:
Carburetor DiaphragmIt is more likely that you are looking for the Hitachi carburetor slide diaphragm. The Hitachi carburetor diaphragm of the US model, OE part number 4X7-14940-01-00, Diaphragm Assembly has been discontinued by Yamaha. I assume the Australian model’s has been discontinued also.Your only options now are to look for used parts or complete set of carbs, locate some NOS parts or find a new source for new Hitachi carb parts. The problem with rubber parts located inside a carburetor is that when you finally locate them they have either been stored dry and are cracked or they have been sitting in old fuel for years and have gone mushy. If you decide to go with used parts, it is important to know that the carbs on your bike also fit the:
So when you are searching for used and NOS parts, keep in mind that not everyone knows that the parts fit other bikes or what the Yamaha part number is. For new parts you can try these sites: Cameron Carburettor Parts in the UK or MotorcycleCarbs.com located in the US. I have heard good things about both of these sites. Supposedly the guys at MotorcycleCarbs.com have found a way to get brand new slides with diaphragms for Virago Hitachi carburetors.
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