Something doesn’t look right... - 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 #1 of 10 Old 11-21-2019, 11:48 PM Thread Starter
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Something doesn’t look right...



What is the pink hose for, connects to the carb. Should that be connected to the tank?


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post #2 of 10 Old 11-22-2019, 01:45 AM
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That is the carb vent line. Does not connect to anything and is fine as is. Do not plug as bike will not run if plugged.
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post #3 of 10 Old 11-22-2019, 11:01 AM
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You should have a tank vent line connected to the nipple shown and plunging down through the hole in the middle of the tank bolt bracket; leastwise on Generation 1s (if I'm not mistaken).

“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 #4 of 10 Old 11-22-2019, 12:33 PM
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Again I'll urge that the Pink float bowl Atmospheric air vent be routed up & over the main frame under the fuel tank and then down along side the shock bracket & spring adjuster.
As the factory Gen 2 pink vent hose is routed, it is pretty much a downhill run for any rain water / car wash water straight into the carb! They don't run with a puddle of water laying in a 'sink-trap' either.

I've wondered what Thailand plant "Engineer" was responsible for changing the routing from Gen 1? Just another 'bone-head' change, for no good reason.

And be careful not to pinch your White Accessory wires under a seat support.

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post #5 of 10 Old 11-22-2019, 03:25 PM
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Quote:
Originally Posted by pdwestman View Post
I've wondered what Thailand plant "Engineer" was responsible for changing the routing from Gen 1? Just another 'bone-head' change, for no good reason.
Not, in my respectful opinion, boneheaded at all. Stock Generation 1s flamed out at a water crossing depth of 10" of so (don't ask me how I know this!).

The higher routing of the Generation 2s air vent hose (or, the "Tee" mod on a Generation 1) results in less vulnerability to water crossing depth, IMHO; YMMV!

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post #6 of 10 Old 11-22-2019, 04:32 PM Thread Starter
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Why not hook the carb vent tube to the tank?


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post #7 of 10 Old 11-22-2019, 06:26 PM
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Quote:
Originally Posted by Damocles View Post
Not, in my respectful opinion, boneheaded at all. Stock Generation 1s flamed out at a water crossing depth of 10" of so (don't ask me how I know this!).

The higher routing of the Generation 2s air vent hose (or, the "Tee" mod on a Generation 1) results in less vulnerability to water crossing depth, IMHO; YMMV!
Yes, the Gen 1 oem routing may have had too long of hose. But I have seen some 'pretty sorry' Tee mods done on all forums.
By routing the Pink hose from the Gen 2 RH side of the frame, up & over the frame spine under the fuel tank and then down alongside the shock bracket, the vent hose terminates at about the top of the shock adjuster (Plenty High).
And one should either cut the hose at an angle or split the bottom inch so the open end cant just be blocked by the flat top of the adjuster.

Quote:
Originally Posted by WingingIt74 View Post
Why not hook the carb vent tube to the tank?


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The carburetor float bowl must be vented to Normal Atmospheric air for the float to float properly and for the jets to meter properly.

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post #8 of 10 Old Yesterday, 06:50 PM
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Pdwestern,

Thanks for posting all this as I had the same questions now that I’ve started pulling my KLR apart. One other question ... see the black hose on the left across from the pink line? I’m assuming it is the overflow vent for the cooling system. Is it normal for it to run up under the rear fender and then end in a U with the open end on top?
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post #9 of 10 Old Today, 04:01 PM
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Normally the Gen 2 coolant reservoir vent/overflow hose (on the left) runs between the black inner fender (still on the Left) under the primary fender and dangles above & to the left of the license plate light. No U-turn.

Gen 1 is similar routing.

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post #10 of 10 Old Today, 04:43 PM
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Quote:
Originally Posted by pdwestman View Post
Normally the Gen 2 coolant reservoir vent/overflow hose (on the left) runs between the black inner fender (still on the Left) under the primary fender and dangles above & to the left of the license plate light. No U-turn.

Thanks. I’ll route it properly when I put it together. I thought it was a weird routing method. I suspect the PO just put in the U turn to hide it.
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