Kawi2strokes.com Forum

if the later lines are screwed anyway, you can break em apart though and use soft lines as the ends are barbed. just fyi.

Hey Mark,
When you have a minute, could you design, fabricate and sell us some 72 H2 replacement check valves with line assemblies at a really low price as we all are broke? Think of the volume quantities you could sell; probably 25 sets!

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There are only two types of motor sport racing:
Nitro and everything else
(Sometimes referred to as fast and slow)

Even if you lose money on each sale, you can make it up in volume.

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If it surges, that's normal, upshift.

I can certainly test blow off and holding ability. If I had a sacrificial later oil line, I could see what could be done. I am a little bit handy. Joe Byrd

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Using a poorly conceived idea along with bad mechanical practice is not an upgrade but rather a recipe for disaster.

Why does Kawasaki need such high blow off pressure? I sourced some Rotax check valves and they only have 1.5 psi and have no crankcase filling problems.

Don

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Don

somebody back when were were posting in Spamalot had sourced some all metal ones that looked really good for soft lines. were 2 or 3 psi cracking? this was 3-4 yrs ago.

just a guess, but might it have something to do with "where" in relation to the checkvalves the oiltank sits? (longer run, tank mounted higher, etc)

The higher the pressure, the better the seal and ability to overcome the crankcase pressure

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Answers are here: http://kawatriple.com/

Motor oil creates a pressure of about 0.385 psi per foot of height. To get 1 psi of oil pressure, you'd need a height of 2.6 feet from the oil surface in the tank to the check valves, and my H2's distance is less than one foot. It would seem like a valve with 1 psi cracking pressure would have nearly a 3:1 safety factor, as far as leaking oil from the tank into the engine when not running. Maybe it's more of what mraxl is saying... the valves need to resist "suction" pulses in the crank case that would tend to increase oil flow.

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If it surges, that's normal, upshift.

one learns more here by accident, then by design.