Starting after a few months storage - Kawasaki KLR 650 Forum
KLR & Other Motorcycle Related Discussion Grab a seat and discuss whatever you like about the KLR or other related topics. Within reason.

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post #1 of 36 Old 03-16-2019, 12:43 PM Thread Starter
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Starting after a few months storage

Well, we got an unusually warm day here in northern PA (50+) so I decided to get the KLR out for a spin after its winter slumber. I think I last rode it in mid-November when I filled the tank and added Stabil, so it probably has sat for 4 months give or take. The battery was on a maintainer so it was in good shape.

I opened the petcock and cranked for probably 15 seconds with no response. I let the starter cool for a few seconds and then cranked again. I was almost ready to quit again when it hit once and then started to hit every 3rd compression stroke or so and finally fired up. Probably close to 30 seconds total cranking time.

Full disclaimer, I have not owned a carbureted bike since my 1987 Voyager so I am not used to bikes that don’t start within a couple of revolutions.

My question is: Is this normal for a KLR that has sat for 4 months? Anything I should do to get it to fire faster and put less wear and tear on the starter? I don’t think my BMW starter cranks as long in total all season as my KLR did for its first start!

Just for grins, I took my daughters Ninja 300 for a short spin also as it has also sat for 4+ months. It fired up as soon as I hit the starter as though it had run yesterday. My BMW does the same. Reminded me again why I love FI. Hopefully, Kawasaki will soon release the KLR successor with all of the current good things, but with FI and switchable ABS. That would be the cat’s pajamas.

Is part of the long cranking the need to generate enough vacuum to open the petcock? Would a manual petcock help in this regard?
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post #2 of 36 Old 03-16-2019, 01:56 PM
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Float bowl (if not drained) should have enough fuel for starting, regardless of vacuum to petcock, IMHO.

Otherwise . . . you may have had some fuel evaporating/drainage from critical galleries during the hiatus; doesn't sound like a severe and continuing problem to me, if the bike now runs OK.

And . . . you suggest the successor KLR will be a KTM690 clone!

(You didn't even MENTION the sixth gear!)

“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 #3 of 36 Old 03-16-2019, 03:22 PM
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Voyager, The best thing that you could have done would have been to drain that float bowl full of half evaporate 4 month old even stabilized fuel. (Could of drained it 4 months ago.)

Then with NO enrichener (choke) & fuel valve definitely turned on, crank the starter 15 seconds to fill the float bowl, without releasing the starter button pull the enrichener full on and it will probably be running as the lever tops out. Pulling the (choke) lever on before cranking reduces vacuum to the petcock, slowing float bowl filling.

Gas is the float bowl is still exposed to atmosphere and does evaporate the volatiles. So you mixed fresher fuel with partially stale fuel even though it had stabilizer in it.

Being that the EPA approved float bowl does NOT have an overflow stand pipe in it, I strongly discourage changing to a manual fuel valve, which can be forgotten & left on.

pdwestman
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Still riding my 1987 KL650-A1. 84,000+ miles & counting
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post #4 of 36 Old 03-16-2019, 03:26 PM
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Was that your posting on FB from Northern PA yesterday. I was surprised to see No Snow in somebodys pics.

pdwestman
Modify at "YOUR OWN RISK"!

Still riding my 1987 KL650-A1. 84,000+ miles & counting
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post #5 of 36 Old 03-16-2019, 06:42 PM Thread Starter
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I did not manually drain the float bowl, but I did turn off the petcock and run the engine until it quit.

I agree and plan to keep the vacuum petcock unless I see a good reason to change it. So far, the fear of failure isn’t a big concern.

No, I did not post any ride pics to FB, but, yes, the snow is now basically gone here after three warm days and yesterday was near 60 I think in the afternoon.
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post #6 of 36 Old 03-16-2019, 06:58 PM
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So there was still a 1/3rd of a bowl of old fuel in the float bowl.

Does it make sense to leave the cold start enrichener OFF until the bowl is filled? DO Not play with the throttle grip At All, either!

pdwestman
Modify at "YOUR OWN RISK"!

Still riding my 1987 KL650-A1. 84,000+ miles & counting
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post #7 of 36 Old 03-16-2019, 07:04 PM Thread Starter
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Quote:
Originally Posted by pdwestman View Post
So there was still a 1/3rd of a bowl of old fuel in the float bowl.

Does it make sense to leave the cold start enrichener OFF until the bowl is filled? DO Not play with the throttle grip At All, either!
I have not yet looked at the carburetor design on the KLR, but, no, it is not obvious why the enrichener is reducing the vacuum. Does the enrichener crack open the slide/butterfly?

I wish the KLR had no catcon as I would then fill it with 100LL for the winter as I do with my off-road equipment.
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post #8 of 36 Old 03-16-2019, 07:55 PM
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Oh, Voyager; our Voyager!

I STRONGLY recommend for you, THIS THREAD, on THIS website:

https://www.klrforum.com/how-tos-tec...ing-cvk40.html

And, should you be interested in living-color videos of the innards of the CVK40, check out the, "CARB OVERHAUL" thread on the same forum.

“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 #9 of 36 Old 03-16-2019, 08:16 PM
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And now; and now, Voyager: I shall share with you my perception of the CVK carburetor's ENRICHER design and function. (PEER REVIEW: Corrections, contradictions always welcomed!)

O.K. A PLUNGER seals a raw fuel orifice in the carburetor, when "OFF." When the enricher is activated ("ON,"), the plunger is withdrawn from the orifice, enabling raw fuel to flow into the carburetor.

ALSO, and very importantly, when the enricher plunger is withdrawn, an AIR PASSAGE simultaneously opens.

The raw fuel from the enricher fuel orifice and the air from the air passage MIXES, providing a fuel-rich mixture to the carburetor venturi for ease in starting.

THUS; the starting enricher on your KLR650 exists as a sort of, MINI-CARBURETOR, independently mixing air and fuel upon activation.

A small detail: The CVK carburetor enricher is NOT a "choke," as referred to by many. A choke restricts air flow into a carburetor (as with an occluding butterfly valve), creating a fuel-rich mixture. Yet, the KLR starting enricher is referred to as the "choke" even by cognoscenti, even in service manuals.

And then, besides the starting enricher discussed above, there's the COASTING ENRICHER/air cut valve/backfire preventer; but . . . that's another story!

--------------------------

Then, as some say, "A picture is worth . . . "; aw, I forget the rest!



(The DESCENDING arrows indicated air flow; the HORIZONTAL little dots and stuff represent FUEL, to the best of my knowledge and belief.)

-----------------------------

“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

Last edited by Damocles; 03-16-2019 at 08:24 PM.
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post #10 of 36 Old 03-17-2019, 08:16 AM Thread Starter
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Quote:
Originally Posted by Damocles View Post
And now; and now, Voyager: I shall share with you my perception of the CVK carburetor's ENRICHER design and function. (PEER REVIEW: Corrections, contradictions always welcomed!)

O.K. A PLUNGER seals a raw fuel orifice in the carburetor, when "OFF." When the enricher is activated ("ON,"), the plunger is withdrawn from the orifice, enabling raw fuel to flow into the carburetor.

ALSO, and very importantly, when the enricher plunger is withdrawn, an AIR PASSAGE simultaneously opens.

The raw fuel from the enricher fuel orifice and the air from the air passage MIXES, providing a fuel-rich mixture to the carburetor venturi for ease in starting.

THUS; the starting enricher on your KLR650 exists as a sort of, MINI-CARBURETOR, independently mixing air and fuel upon activation.

A small detail: The CVK carburetor enricher is NOT a "choke," as referred to by many. A choke restricts air flow into a carburetor (as with an occluding butterfly valve), creating a fuel-rich mixture. Yet, the KLR starting enricher is referred to as the "choke" even by cognoscenti, even in service manuals.

And then, besides the starting enricher discussed above, there's the COASTING ENRICHER/air cut valve/backfire preventer; but . . . that's another story!

--------------------------

Then, as some say, "A picture is worth . . . "; aw, I forget the rest!



(The DESCENDING arrows indicated air flow; the HORIZONTAL little dots and stuff represent FUEL, to the best of my knowledge and belief.)

-----------------------------
I haven’t got through all of the videos yet, but I am not yet sure how using the enrichener would significantly increase the fill time for the float bowl. I am not questioning that pdwestman is correct given his long experience with KLRs, I just haven’t yet got the operation of the CVK sorted out in my mind enough to know what is going on here.
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