Fuel Petcock and Float Needle Questions - Page 2 - Kawasaki KLR 650 Forum
2008+ KLR650 Wrenching & Mod Questions For repair, maintaining or modifying discussions related to the newly updated 2008 and beyond, Generation 2 KLR650 Motorcycle.

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post #11 of 20 Old 03-03-2020, 12:43 PM
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I had an OEM petcock gasket (not the diaphram) begin to deteriorate after about 15 years. I did not realize it was happening until a tiny piece became embedded in the rubber tip of the float needle, causing a flooding condition. I was about 25 miles from home and it took quite a while to figure out what was happening. Based on that experience I'd probably consider consider gasket replacement after about 10 years on my KLR's.
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post #12 of 20 Old 03-03-2020, 12:50 PM
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Originally Posted by eamartin View Post
I had an OEM petcock gasket (not the diaphram) begin to deteriorate after about 15 years. I did not realize it was happening until a tiny piece became embedded in the rubber tip of the float needle, causing a flooding condition. I was about 25 miles from home and it took quite a while to figure out what was happening. Based on that experience I'd probably consider consider gasket replacement after about 10 years on my KLR's.
Are you referring to the packing (part#43049-1017) or as I prefer to call it, the 4 holed Selector Disc, the "gasket"?

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post #13 of 20 Old 03-04-2020, 08:56 AM
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Are you referring to the packing (part#43049-1017) or as I prefer to call it, the 4 holed Selector Disc, the "gasket"?
The deteriorating item on my bike was the "4 holed selector disc", referred to by Kawasaki as a "packing".
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post #14 of 20 Old 03-05-2020, 12:11 PM
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Hi Paul, will a small inline filter between the fuel tank and carb be able to pass enough fuel at higher throttle settings?
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post #15 of 20 Old 03-05-2020, 12:14 PM
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I'll defer to Paul for an authoritative answer, but . . . in my own experience, my KLR650 has never been fuel-starved with a small inline filter in the fuel line; YMMV!

“You better put down that gun. You got two ways to go, put it down or use it. Even if you tie me, you’re gonna be dead.” "John Russell" (Paul Newman), Hombre
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post #16 of 20 Old 03-05-2020, 01:45 PM
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Hi Paul, will a small inline filter between the fuel tank and carb be able to pass enough fuel at higher throttle settings?
Yes, pretty easily.

Best to Avoid any paper media in-line fuel filters because moisture can restrict their fuel flow, especially in gravity feed systems.
But any of the sintered brass or fine screen type in-line fuel filters should pretty Easily Flow 3 gallons + per hour.

3 gallons per hour is more than the Worst fuel mileage that I have ever gotten on my KLR650, 35mpg, 70 mph in headwind or 36 mpg at 90 mph and no wind.

The other day I timed my standard oem vacuum fuel valve with its In-Tank screen fuel filters, no additional filter, with fuel cap open & fuel cap closed. I used a common Visine bottle to suck open & hold open the vacuum diaphragm.

The fuel valve on my bike is currently capable of flowing 1 gallon of fuel in 3 minutes 55 seconds, twice.
That would be over 5 gallons in 20 minutes. I don't believe an additional screen will slow it down very much.

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post #17 of 20 Old 03-05-2020, 02:46 PM
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Thanks Damocles and Paul. I bought a couple 90 degree clear brass screen filters for catching those rubber bits. Other than inlet/outlet do I need to orient the filter a certain way to ensure proper fuel flow? Many thanks in advance for taking the time to educate me.
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post #18 of 20 Old 03-05-2020, 02:55 PM
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There are usually 'directional arrows' on these little fuel filters, but they will probably flow equally well in either direction.

pdwestman
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post #19 of 20 Old 03-05-2020, 05:09 PM
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Originally Posted by Uncle Dick View Post
Thanks Damocles and Paul. I bought a couple 90 degree clear brass screen filters for catching those rubber bits. Other than inlet/outlet do I need to orient the filter a certain way to ensure proper fuel flow? Many thanks in advance for taking the time to educate me.
Unless Mr. Pascal ("the rascal") was funning us, probably not! (q.v., hydrostatic law). Still, honoring a directional arrow (if any) seems a good idea.

Yet, inmates on one KLR website (I think it was, KLR World), rejected Pascal's Law. They insisted trimming fuel tank standpipes increased static fuel pressure. (They also rejected Newton's First Law of Motion, and probably believe the world is flat and the sun revolves around the planet.)

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post #20 of 20 Old 03-05-2020, 07:20 PM
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....probably believe the world is flat and the sun revolves around the planet.)
I don't know why this notion is so soundly poo-pooed in the scientific community. I can clearly see that the sun is rotating about the earth merely by observing its progress through the heavens on a daily basis.

And, as can be seen in this video, the motion of the planets as they circle the earth is quite orderly.

I think the fact that we can observe retrograde planetary motion further proves it beyond any further doubt.

That's my story and I'm sticking to it.
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Last edited by Tom Schmitz; 03-05-2020 at 07:25 PM.
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