Kawi2strokes.com Forum

In a word, yes and no. It was a stock petcock, for an '86 600 Ninja. At higher elevation (Bonneville is usually around DA 7800 during Speed Week) you have less pressure acting on the fuel in the tank so extreme action must be taken to make a gravity feed system flow enough. I will be setting up future bikes with an electric pump due to the flow problems I had.

Interesting, thanks for the explanation.

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If it surges, that's normal, upshift.

Great - sounds like an easy way to get piece of mind
Thanks u

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Peter says:
Keep the revs up !

Bikes:
H1 Candy Red, 1970
Moto Guzzi Daytona 1000, 1992

Do a fuel test. Place the three lines into a jug and measure how much flow there is in one minute. Repeat test with fuel cap open. Often the vent gets partially blocked. When I was younger my H1-B would run the bowls dry after about 3 miles WOT. I found the vent /cap gasket had swollen due to water ingress blocking part of the air inlet. After fixing that I could run for pretty much as long as I wanted. Bike was completely stock however.

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I am just a man working in a tin shed.

That's some good advice, Nev. I had my H2's gas cap labyrinth vent clog from swollen gaskets myself. And if you're not used to how it goes together, it can be pretty confusing.

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If it surges, that's normal, upshift.

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Always remember, there will be greater and lesser people than yourself . . . you can learn from either!

I guess a matchstick would have greater diameter than the combined total of 4 main jets, right? The volume of fuel that can flow through the main jet is what really matters...and it's probably less than we think even considering intake vacuum.

4 carbs for sure but only pulling fuel every second lap of the engine. A Zed uses half the fuel of an H2. Do not forget that the size of the jet is not everything, the engine pulls fuel out of that hole, more than just what would run thru the hole with gravity.

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I am just a man working in a tin shed.

my tank drained from full in about 1 minute but I'm using a 3/8" ball valve for a petcock. Just do the test with the fuel cap on and compare flow at the beginning and end. I doubt any triple can consume that amount.
Rounding some numbers
100 mph @ 10 mpg with a 3 gallon tank, it would take 18 minutes to consume that gas.
Maybe not the perfect equation but it kind of put things into perspective.

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http://kawatriple.com/wtf/

Wow that IS a good tap.

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I am just a man working in a tin shed.