Bike dying and backfiring??? - 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 25 Old 08-09-2008, 05:33 AM Thread Starter
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Bike dying and backfiring???

I have an 07 KLR and it has been sitting for 5-6 days. It ran fine when I last ran it. It started up fine. As I was riding it appeared to accel fine, but when I would lay off the gas to come to a stop or shift, it would backfire and I would have to give it gas to keep running. It seemed to get worse in the 18 mile drive and now I am stuck at work. What do you think? Carb? (Seafoam) OR plugs or what? Thanks
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post #2 of 25 Old 08-09-2008, 08:33 AM
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Junk in the carb more than likely. Sounds like something in the idle jet. Try half a can of Seafoam with only a gallon of gas, run that out, then finish off the can with another gallon of gas. Should cure the problem. If that won't do it, you may need to remove the bowl and clean the carb. If you get a chance I suggest dropping by the dealer and picking up an inline filter, that has the gold/brass looking filter inside. It will not slow your fuel delivery and should keep grit and junk that everyone is experiencing nowadays to a minimum. You may try draining the bowl into a glass jar and make sure you don't have water in the system. Keep us posted.

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post #3 of 25 Old 08-09-2008, 08:52 AM
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Sounds a lot like water in the gas too.

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post #4 of 25 Old 08-09-2008, 09:25 AM
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NAPA probably has that little filter. Got one here last week.
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post #5 of 25 Old 08-09-2008, 10:12 AM Thread Starter
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Sounds good, I will be looking into your ideas and will try and keep eveyone posted. I will be working on it tonight after work, when I can figure out how to get it home, as I cannot even keep it running now, lol. Oh well, it'll give me something to do tonight with a couple cold ones. Again thanks and I'll keep you posted.
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post #6 of 25 Old 08-10-2008, 10:19 PM
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Man I'm sorry you're having the problem but it makes me feel better. I'm having a very similar problem with my '06 KLR. Yesterday I pulled the carb and did a thorough cleaning and installed the Dynajet upgrade. I figured in all that I would have gotton the gunk out. No luck!
I was reading in a repair manual about the muffler getting a buildup of carbon and causing some backfiring and poor idle. Anyone else hear about this???
Thanks,
Kingrider
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post #7 of 25 Old 08-11-2008, 01:33 AM
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I would guess it would take a lot of miles running rich to produce enough muffler gunk to affect performance.
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post #8 of 25 Old 08-25-2008, 12:42 PM
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Hi Joker,

My '07 KLR w/ 1800 miles is doing the same thing. Were you able to resolve the issue? I plan to pull the low speed jet plug and check adjustment and pull the bowl to see what's going on.

Steve
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post #9 of 25 Old 08-25-2008, 01:08 PM Thread Starter
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Hi Steve, I did reslove my issue, but had to have a known carb guy in the area fix it. I had checked the gas, spark plug, fuel lines, etc. and found nothing. So anyway, the guy cleaned the carb and said there was a little gunk in there and said that due to the the carbs having to run so lean that any varience can throw them off.
To help prevent this, he bored the fuel screw and raised the needle, which actually has given me better throttle response to boot. One other thing is, the manual says you can run 87 octane (which I was), but I was recommended to use the high test gas due to the ethonal in the gas, as it tends to gum up faster in the lower octanes.
If I let the bike set for any length of time, I think I am going to run a little sea foam in the system prior to.

I hope this helps!!!
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post #10 of 25 Old 08-25-2008, 01:22 PM
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Even tho Seafoam advertises as a stabilizer, I'd personally use a dedicated stabizer such as Stabil. No back-up facts, except "I've always done it that way" and had success with generators, outboards and such.

I agree about the ethanol. I've come to dislike it and think we're making a big mistake pushing it.
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