Hunting down a problem (with solution!) - 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 2 Old 03-20-2011, 08:28 PM Thread Starter
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Hunting down a problem (with solution!)

(Here's a nice, long-winded post about the importance of fresh gas in your bike)

In the heat of last summer, my 2000 KLR (76,000 miles on the clock and nary a problem) started to stall when warm and pulling up to a red light. I can't say that I know a lot about the KLR and mechanical things in general, so I just ignored it for a while, as the bike ran fine otherwise.

After a couple of months I decided to fiddle with the bike some more only to find that the idle was really really off. It sounded like a bad tractor and I winced to hear it run. I tried taking the carb off my 2001 KLR (red) and trying it in the 2000 (green) KLR. No luck. I switched out the ignitor, replaced the plug and futzed with the hoses and clamps, making sure that everything was properly connected. Nothing worked. Finally I took the bike to a friend's house where he cleaned the carb and adjusting the float. Nothing was really out of whack, but when he put the carb back in the bike, it still ran like crap.

Winter hit and I wasn't about to mess with the bike in the cold so I put it up for the winter and let it sit until today. Some friends came over for my Tech Day and took a few shots at the bike. First off was to check the timing chain (all good there - the valves were in spec too. Figured we might as well check them while we were in there). Then we pulled the CDI from the red bike and put it in the green bike. Nadda. Perhaps the piston was bad? The cylinder?


We didn't know what else to do. They started suggesting that I just part it out, seeing as I had bought the red KLR to replace the green one when it died anyway. I was sad.

I started to put the red KLR back together, figuring that at least I have the one bike to ride. I finished up the heated grip installation, poured the gas from the green KLR into the tank, put the battery back in (I only have one battery for the two bikes right now) and started it up just to confirm that I had a running bike. I didn't. Now the red one ran horribly!!!

The three of us looked at each other and then Marc said the magic words: "Bad gas?"

After much more fussing around, we finally pinpointed that yes indeed, with fresh gas, *both* bikes ran like champs.

I still have no answer as to why the green bike was stalling last summer, and I haven't been able to ride it yet and really see how it performs, but I have confidence that it is mostly sorted out now.

So the final words of wisdom are "Is the gas good?"

You don't know unless you ask.

Check out my website <--- rides! rides! rides!
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post #2 of 2 Old 03-29-2011, 03:34 PM
5th Gear
Join Date: Sep 2006
Posts: 4,700
Always start with the simple stuff, first..

After the gas, I go straight to the spark plug..
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