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wondering if anyone can tell me the size of the vacuum port bolt on the cylinder head of my 81 gs750e. looking for a nipple fitting for that port so I can go back to a vacuum actuated petcock after moving to keihin carbs. Thanks!
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Your original mikunis had a vacuum port on #2 carb ( second from left as you sit)- how old is this set of keihins? no sign of vac fitting on one of these carbs?1981 gs650L
"We are all born ignorant, but you have to work hard to stay stupid" Ben Franklin -
The vacuum port bolt will have M5 x 0.8 threads.
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mine: 2000 Honda GoldWing GL1500SE and 1980 GS850G'K' "Junior"
hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
#1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
#2 son: 1980 GS1000G
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