headsbikesmopars
Forum Mentor
The 8 valve engines must be different than the 16 valve engines . All of my 16 valve GS's have the Vacuum nipple on #2 carb .
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Yet another petcock question
- Thread starter BoardBandit
- Start date
Steve
GS Whisperer
It's not 8-valve vs. 16-valve engines. It's VM-series carbs vs. BS-series carbs, which appeared on most bikes* in the 1980 model year.
All of the 16-valve engines happen to have BS-series carbs.
*Trivia detail: the two-cylinder bikes before 1980 also had BS-series carbs.
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Yeah, pretty much. Disassembling a petcock is an utterly useless action unless you just want to see how it works.
Many have tried to save an old petcock, all have failed. Untold volumes of gasoline and time have been spilled and wasted on this hopeless endeavor.
Replace with OEM or OEM equivalent and forget about petcock troubles for another 30 years.
Or look at it this way: it's a crucial valve controlling an incredibly flammable fluid a few inches from your crotch. Is this really the place to skimp?
