mellorbo Posted May 4, 2019 Share Posted May 4, 2019 hi people. i have looked all over and cant seem to find the answer. so. i recently bought a 1989 XJ600. and i noticed on the fuel tap it says on, reserve and prime... question is what is the prime position for and should i use it? i have only ever seen on, off and reserve on bikes so im guessing its something the older bikes had. any help would be greatly appreciated. Link to comment Share on other sites More sharing options...
slice Posted May 5, 2019 Share Posted May 5, 2019 Hi, well the PRIME is used only when you have emptied the carbs ie had them apart or run out of fuel. the rest of the time just ignore it. You might need it if the bike has not been used for a long while and the carbs have drained down but that can take months to happen. 1 Link to comment Share on other sites More sharing options...
jimmy Posted May 5, 2019 Share Posted May 5, 2019 To further Slices' answer, you have vacuum carbs on your bike so petrol feed should only occur when the engine is running, therefore no requirement for an off position 1 Link to comment Share on other sites More sharing options...
mellorbo Posted May 5, 2019 Author Share Posted May 5, 2019 ahh great stuff. thankyou guys. i wasnt sure if i should use it when using the choke or on startup. thanks for the info. prob saved me a headache later on Link to comment Share on other sites More sharing options...
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