Hard starting - Kawasaki KLR 650 Forum
2008+ KLR650 Wrenching & Mod Questions For repair, maintaining or modifying discussions related to the newly updated 2008 and beyond, Generation 2 KLR650 Motorcycle.

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post #1 of 14 Old 11-01-2011, 10:08 PM Thread Starter
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Hard starting

This will be the first winter with my KLR, and now that it's getting colder the bike doesn't want to start. I'm at 5500 ft above sea level and was thinking that rejetting might be the answer? If I rejet the carb should I go ahead and upgrade the exhaust? And yes I tried the choke.
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post #2 of 14 Old 11-02-2011, 01:01 AM
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Ever adjust your FUEL SCREW?

You must gain access by removing the tamper-resistant cap, lower front of carb.

Use small flat-blade screwdriver; bottom screw gently, then back out 1.75 turns or so. This procedure fuel-enriches the idle mixture from typical factory settings.

Then again, you may be suffering the dread pox of ethanol fuel contamination, partially blocking your pilot jet . . . a "good scrubbin'" is the only way I know to solve definitely this problem, although some praise heavily fuel additives (e.g., "Sea Foam").

All that said, your bike oughta start when cold by application of the "choke" (starting enricher). When ON, a plunger is withdrawn from the carb, opening a fuel orifice and an air passage, insuring a fuel-rich mixture; make sure your choke's working correctly.
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post #3 of 14 Old 11-02-2011, 10:55 PM Thread Starter
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I'm sure the choke is working.... If I back it off to soon it will die.
I' ll take a look at fuel screw.
Thanks
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post #4 of 14 Old 11-16-2011, 08:11 PM
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I'm not at 5500 ft, but I was having the same issue on my 2009. Changed the spark plug and problem was solved. I was backfiring quite a bit while turning it over too. Most often the battery would die before starting, but new plug and problem gone.
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post #5 of 14 Old 11-16-2011, 08:30 PM
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Quote:
Originally Posted by LoneRider View Post
Ever adjust your FUEL SCREW?

You must gain access by removing the tamper-resistant cap, lower front of carb.

Use small flat-blade screwdriver; bottom screw gently, then back out 1.75 turns or so. This procedure fuel-enriches the idle mixture from typical factory settings.

Then again, you may be suffering the dread pox of ethanol fuel contamination, partially blocking your pilot jet . . . a "good scrubbin'" is the only way I know to solve definitely this problem, although some praise heavily fuel additives (e.g., "Sea Foam").

All that said, your bike oughta start when cold by application of the "choke" (starting enricher). When ON, a plunger is withdrawn from the carb, opening a fuel orifice and an air passage, insuring a fuel-rich mixture; make sure your choke's working correctly.

If he's at 5,500ft in altitude he does not need to enrichen the mixture.
Quite the opposite, the mixture needs to be leaned out to accommodate the
proper stoichiometric ratio.

Although, the cooler air would increase the ambient air density but probably not enough to make a huge difference and offset the altitude.

Moisture and Humidity will also displace air molecules and require a leaner mixture.

In other words, high altitude and a hot, humid day would be the worst case scenario and would require leaning (less fuel) the mixture to get the best performance.

Low altitude, cool weather and dry air will get you the best possible performance and could require you to enrichen (more fuel) the mixture.


Try starting without the choke and see what happens.

Although, having said that, it seems that it starts with the choke on and dies with it off.
You could try turning up the idle and see if that keeps it running.

Check the air filter as well and make sure its clean..on that note, take the air box side cover off and note weather its better or worse.

Tractorking
Sitting on a dock of the Bay
Redwood City, California

“Although motorcycle riding is romantic, motorcycle maintenance is purely classic.”
Robert M. Pirsig

Last edited by tractorking; 11-17-2011 at 01:42 PM.
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post #6 of 14 Old 11-16-2011, 09:38 PM Thread Starter
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I only have 1400 miles so the air cleaner should be clean (I have been on dirt but not very dusty). I'm going to check the air cleaner and change the plug and see what happens.
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post #7 of 14 Old 11-16-2011, 10:38 PM
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What year is your KLR? Many of the 08's had hard starting issues in cold weather because the KACR reduced the comression too much during start up. Removing a couple of thousandths off the KACR resolved the issue.
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post #8 of 14 Old 11-17-2011, 08:07 AM Thread Starter
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It's a 2011
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post #9 of 14 Old 11-22-2011, 05:08 AM
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KACR ?

I had an issue the other morning at 25 degrees. Crank no start used a jump box and it would start and die this happened about 6 or 8 times finally it stayed running .

It's been better since but has also warmed up.

Mine is an '09 though ?

Thanks
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post #10 of 14 Old 11-22-2011, 11:10 AM
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Quote:
Originally Posted by Two Trackin Fool View Post
KACR ?

I had an issue the other morning at 25 degrees. Crank no start used a jump box and it would start and die this happened about 6 or 8 times finally it stayed running .

It's been better since but has also warmed up.

Mine is an '09 though ?

Thanks

If it starts when you jump it your battery has problems. Could be that the connections are corroded and the extra current from the jump is overcoming that. The battery could be going out also, is it the original?

The Gen 2s need a good battery voltage to run that's probably why yours starts but won't run until the voltage stays up.

No eye has seen, no ear has heard, no mind has conceived what God has prepared for those who love him. 1 Cor 2:9
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