KLR 650 PCV Mod

Idea from this thread: http://www.klr650.net/forums/showthread.php?t=41326

Purpose: only lets the engine case exhale, not suck air back in.
Side effect: potentially reduces or eliminates your engine's oil drinking problem
If you do this mod and don't like it, it is easily reversible.

Tools you'll need:
Pliers
Flathead screwdriver

Other stuff you'll need:
Hose clamps (3)
PCV Valve (1)
-O'Reilly Auto/Microguard PCV345
-FRAM FV345 & FV345DP
-BWD Auto PCV358
-Napa Item MPF39358 or CRB29358
-Advance Auto, Purolator #PV1050
(Thanks to 'nnichols' for the cross reference)

*Corrections: 1) I said PVC Valve. That is incorrect, it is PCV Valve. 2) PCV valves can be any orientation and work the way they are supposed to, maybe not the way you intend. See clarification below.
*Clarifications: When I said "Won't do anything," I meant "won't do what you want it to."
My apologies for any errors and misunderstandings.

The engine breather hose is accessible from the left side of the bike. Use the pliers to move the crimp clamp holding the hose to the air box down. Use the screwdriver to break the seal between the hose and the box and work it off. Push the rubber "clamp" (mine was completely dry-rotted and not being very useful) up and use the screwdriver to break the seal between the engine and the hose and work that off.

Mark the section of hose that you want to cut out (I cut out just enough so that the overall hose length wouldn't change very much). If you want, I'm pretty sure it would still work just fine if you only made 1 cut and did a simply infix of the valve. Make sure the threaded end is towards the air box (the numbers on the hex part of the valve should be upright when installed).

Put the hose clamps on around the PCV valve and tighten them down (not super-duper tight, it's only plastic inside the hose!).

Slip the 3rd hose clamp on the bottom of the hose (don't tighten it yet) and push the hose on the engine breather port. Put the crimp clamp over the hose, holding it open with the pliers and slide the top of the hose onto the air box port as far as you can. Now tighten the engine end hose clamp.

Start 'er up and make sure that you have the valve oriented properly (threaded end up, numbers upright). You should hear (and feel) a clicking coming from the valve.



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Category:

Autos & Vehicles

Tags:

• Kawasaki
• KLR
• 650
• KLR650
• Motorcycle
• Dirtbike
• Dirt
• Bike
• PVC
• Valve
• Mod

[shasha1873]

How can I put a V-twin 1000 Suzuki engine in my KLR?

[ghotioutofh2o]

Very carefully and with a running start.

[shasha1873]

@ghotioutofh2o But dude, will it fit?

[ghotioutofh2o]

Yes, probably... if you do some major frame re-working.

[transistor281]

What is the brand or part # for the valve? O'Rilley couldn't find a valve with the proper dimensions.

[ghotioutofh2o]

Please check the video description, 3rd block of text.

[theklrdude]

those big hose clamps don't look very elegant, do they.

[shasha1873]

@Oldbmwr100rs Yes. The V-Strom seems to be the best option. I am looking at few of them that are for sale as we are typing. Thank you for your suggestion.

[Oldbmwr100rs]

@DecaPierce In this case, the valve is being used as a check valve, allowing crankcase pressure to be pushed out, but not allowing air to be drawn in. The idea is to always have a negative pressure in the crankcase to reduce crankcase pumping losses.

[Oldbmwr100rs]

@shasha1873 Buy a V-Strom.

[shasha1873]

@EvanVittoriano LOL... OK. That is the same thing my dad told me.

[EvanVittoriano]

@shasha1873 Get lighter girlfriend.

[sithlord2003]

@shasha1873 read the manual no more than 400LBS on that bike, so either u or ur gf or pushing it

[shasha1873]

@klrbiker Very good idea man. That would be even better and easier to do.

[klrbiker]

@shasha1873 I'd like to see someone put the Versys motor in a KLR.

[nagrain]

I have a 2009 and it gets oil thirsty from time to time, someone mention that I should d this mod so does it really help? where can I find the part?