Fuel-valve question. - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 4 (permalink) Old 06-24-2010, 03:23 PM Thread Starter
'87 VN750 'Black Pearl'
 
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Fuel-valve question.

Last month I became the proud owner of a '87 Vulcan VN750. I've been going around the bike with my owners manual and while checking my fuel-valve I discovered it has 3 positions, On/Prime/Reserve. According to my owners manual it shoud be On/Off/Reserve
Whats the difference between a fuel-valve with On/Prime/Reserve and one with On/Off/Reserve? On, Off and Reserve are clear, what happens if the valve is on Prime position?
Maybe not much of a question but can't find the answer in my owners manual.
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post #2 of 4 (permalink) Old 06-24-2010, 03:37 PM
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Prime allows fuel to flow while there is no vacuum to the valve. While cranking for example.

Jon

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post #3 of 4 (permalink) Old 06-24-2010, 06:02 PM
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I think your `87 is the last model year that had a petcock with the prime position. As Jon mentioned, "prime" allows fuel to flow to the carb bowls, without vacuum, even without the engine cranking over.

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post #4 of 4 (permalink) Old 06-24-2010, 09:16 PM Thread Starter
'87 VN750 'Black Pearl'
 
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Thanks for the quick reply's. The 'top ten list' looks very usefull and I will check my bike according to this list.
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