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post #1 of 25 (permalink) Old 02-22-2019, 12:09 PM Thread Starter
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Location: Mexico City
Year/Make/Model: 2010 Kawasaki Vulcan 900 Classic LT
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Help

Hello to all , I'm in desperate need of advice , on tuesday my bike stardted to sputter and lose power intermittently so I figured the spark plugs need to be replaced , so I went out and got new ones (iridium type CPR7EAIX-9) , I changed them wednesday took it for a spin and the bike ran fine , came to work yesterday (I ride my bike to work everyday) it's a 42 mile round trip and it ran ok . Today half way to work it started to sputter and lose power again, when it stops running I can start it again right away and it idles ok and it runs ok for a cuople of yards or even a couple of miles and then it starts to lose power again I managed to get to work and as soon as the engine was cool I took out the spark plugs and they look ok with no fouling , so my question is has anybody experienced a similar situation , any ideas on how to fix this problem ?

Thanks in advance
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post #2 of 25 (permalink) Old 02-22-2019, 12:41 PM
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With very limited info I'd start with reading the stator thread in the 900 section.

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post #3 of 25 (permalink) Old 02-22-2019, 01:00 PM
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mileage on bike more info needed

fuel pump?? Fuel injectors??
how old is your battery??? - fuel injected bike needs a good reference voltage from battery 12volts!~!

How about you got a tank full of bad gas.

Maybe run some Seafoam in gas tank and get a fresh tank of gas.
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post #4 of 25 (permalink) Old 02-22-2019, 01:07 PM
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Suggest checking the battery. Kawi spec. is a minimum 12.71 v. with everything switched off. If it passes that test suggest having it load tested - don't know about Mexico City but in the U.S. some auto supply stores will test for no cost. Post back with results. If it is OK one of our diagnostic experts such as sfair may be able to help resolve the problem.

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post #5 of 25 (permalink) Old 02-22-2019, 02:53 PM Thread Starter
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Thanks a lot for the suggestions , i've already changed the stator and battery about a year ago and i read the thread back then as you are suggesting , i'll go down to Autozone to have the battery load tested as the reading with a multimeter I have here at work is 12.8 V and the motor turns ok with the starter and fires up right away , also the headlight shines ok and brightens up just a little when I rev it up , the problem stared around two days after I filled her up but I will drain the gas it has and fill her up with fresh gas , I'll also check the fuel pump although it seems to work right , do any one knows what the working pressure should be ? And lastly if all this does not cure the problem I ?m going to have the injectors checked , any more ideas ? All of them are greatly appreciated . Once again thank you all for your advice
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post #6 of 25 (permalink) Old 02-22-2019, 05:01 PM
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you've filled up the tank but got some gas in the tank air vent line? causes a vacuum in the tank and cuts off fuel flow, try blowing out gas out of that air vent line

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post #7 of 25 (permalink) Old 02-22-2019, 05:06 PM
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I am betting you have a bad coil(runs bad after getting warm/hot). this is typical of a bad coil.
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post #8 of 25 (permalink) Old 02-22-2019, 05:07 PM Thread Starter
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Quote:
Originally Posted by btom View Post
you've filled up the tank but got some gas in the tank air vent line? causes a vacuum in the tank and cuts off fuel flow, try blowing out gas out of that air vent line
Will do thanks
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post #9 of 25 (permalink) Old 02-22-2019, 05:16 PM Thread Starter
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Join Date: Apr 2017
Location: Mexico City
Year/Make/Model: 2010 Kawasaki Vulcan 900 Classic LT
Displacement/CC's: 900
Color: Blue/Grey
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Quote:
Originally Posted by Tynker View Post
I am betting you have a bad coil(runs bad after getting warm/hot). this is typical of a bad coil.
Ok will check both coils
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post #10 of 25 (permalink) Old 02-22-2019, 05:19 PM Thread Starter
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Join Date: Apr 2017
Location: Mexico City
Year/Make/Model: 2010 Kawasaki Vulcan 900 Classic LT
Displacement/CC's: 900
Color: Blue/Grey
Gender: Male
Posts: 111
Quote:
Originally Posted by Biebs View Post
fuel pump?? Fuel injectors??
how old is your battery??? - fuel injected bike needs a good reference voltage from battery 12volts!~!

How about you got a tank full of bad gas.

Maybe run some Seafoam in gas tank and get a fresh tank of gas.
Sorry I didn't payed attention to thr title on your post the bike has 65,470 miles and I drive it on a daily basis to work and back plus the weekend pleasure rides
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