Engine Ping - Kawasaki KLR 650 Forum
1987 to 2007 Wrenching & Mods For maintaining, repair or modifications of Generation 1 KLR's. 2007 and earlier.

 
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post #1 of 10 Old 05-09-2007, 07:34 AM Thread Starter
 
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Engine Ping

Have an 07 KLR with 1300 miles on the clock with 16 tooth sprocket. It has a noticable engine fuel related ping at freeway speeds on level groung at cruise. This meaning at 65 to 75 mph at 4000 to 4500 rpm. on the tach. Is anyone else had this situation? The cause and what the cure might be?

Thanks Bill in Phx.
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post #2 of 10 Old 05-09-2007, 07:52 AM
 
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The obvious i can think of is what grade of gas are you using and how is your spark plug? lean/rich/old/cold/hot? Ever think of tuning the bike to your majority of riding?
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post #3 of 10 Old 05-09-2007, 11:07 AM
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Have you adjusted the valves yet? 4000-4500 is lugging it a little bit IMHO.
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post #4 of 10 Old 05-09-2007, 06:17 PM
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Adjusting the idle mixture screw to 2 or 2.5 turns out will help also.

Last edited by SLO-KLR; 05-09-2007 at 11:09 PM.
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post #5 of 10 Old 05-12-2007, 10:14 PM
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Sounds like you need to check the valves, have you done the DOO?

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post #6 of 10 Old 05-13-2007, 09:44 PM Thread Starter
 
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Engine Ping

To try and answer all. The valves are in specs. The doo is done. The low rpm's at freeway speeds are due to a 16 tooth sprocket up front. The Carb-a-tator has been tweaked 2-1/2 turns out. To tune it to the way and altitude I ride could be a little difficult. Line in Phx. AZ. at 1000 feet or so above sea level. In an hour and half I can be in much thinner cooler mount air and elevations up around 8000 feet. Which reminds me I need to hook with Josbek from Payson and do Saturday morning breakfast in Strawberry.

Still searching, Bill in Mesa/Phx.
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post #7 of 10 Old 05-13-2007, 10:27 PM
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Hi Bill.
Sorry to hear of your problem. I'm not much on carbs but it does sound like you are a little lean.
I am thinking of hosting a weekend ride after I get back from Moab in June.
I am up for a sat AM breakfast & ride on the weekends I am not down in the Valley. Just shout.
By the way, I just put a 14T on mine. I am more into the dirt & I lug too much anyway.
Catch you later.
John

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post #8 of 10 Old 05-16-2007, 04:32 AM
 
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Running the best octane gas I can find cured all the pinging my engine did. All the tweaks are done to my '05, and it's the 2nd KLR I have owned. Give it a try.
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post #9 of 10 Old 05-16-2007, 07:19 AM Thread Starter
 
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The "ping"

Yes I was thinking about fatten' up the octane mix a little bit with the higher octane fuel. The price of gas probably went up a buck and a half overnite so 97 octane will cost more per gallon than what I've paid in the past for a fifth of premium booze. Yukon Jack comes to mind. It was commonly known as the "Black Sheep of Canadian whiskey" Was at Auto Zone Sun. looked at what they had for octane booster additives. Near as I can tell most of the stuff is still mouse milk and snake oil. In the old days we could idle out to the air port and fuel up with a tank of high octane aviation fuel. That was good stuff, really was a wake up call in the combustion chamber.

Thanks Bill
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post #10 of 10 Old 05-16-2007, 10:47 PM
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Have you done any airbox mods?
If 91 or 92 octane pump gas doesn't cure the pinging then it is running too lean and you need to feed it more fuel. You can shim the needle with a #4 stainless washer or buy a KLX needle that is adjustable.

Oh and I love Yukon Jack! SNAKEBITE!
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