Dad needs help with sons bike- can tensioner - Kawasaki Forum :: KawasakiWorld.com
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post #1 of 19 Old 10-23-2014, 12:44 PM Thread Starter
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Dad needs help with sons bike- can tensioner

Can anyone help me out, i have narrowed the noise on my sons 250 down to the cam tensioner or plugs. I have the cam tensioner ordered, its an oem but wasnt sure if the install is as simple as take the old out and put the new in. I dont ride, i dont work on bikes, but i am very mechanical. I diid take his bike up the street to hear the noise so did my own reseach on what it could be. I spent every dollar i had on this bike for him but now i dont want him riding it until its fixed, this noise developed 2 weeks after buying it off craigslist, my luck stinks. Any help will sure be appreciated, Thanks
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post #2 of 19 Old 10-23-2014, 04:07 PM Thread Starter
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i have tried searching for any tutorials but they all seem to be for the 07 and down, can anyone point me to a link, the bike came with no manual or anything. I did an oil change when we got it and have read and watched videos on the valve adjustments just in case but cant find any write-ups or videos on the cct.
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post #3 of 19 Old 10-23-2014, 04:34 PM
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Can you describe the noise better? Take a long screwdriver or piece of wood (like a dowel or broom handle) and put one end at various spots on the engine and the other end on your ear to narrow down where the noise is located the loudest. This will give you an idea of where to look, as well as help with diagnosis.

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post #4 of 19 Old 10-23-2014, 04:40 PM Thread Starter
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its hard to describe, it ticks real loud almost like rapping noise that goes along with the rpm, it does seem to have lost some power also. Like i stated i do not have a license so i can only drive it on my street but can hit 3rd gear before slowing down, the entire time you can hear this noise, metal slapping i guess you give it gas it gets faster, let off and it gets slower. i would say like a car with no oil noise, but this has oil, lol.
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post #5 of 19 Old 10-23-2014, 05:00 PM
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Time to narrow down where it is the loudest. Valve noise could be like that, as could a cam chain guide being worn out or broken. Check compression to check the valves. Both problems can cause loss of power. Might get lucky and just have a bad tensioner as well....could pull that out and check for damage while you're digging around. Be sure to lock it and replace it properly to avoid engine damage. Not sure what the tensioner is on a 250, but most are simple. Unlock, compress, lock, install, unlock. Not doing it right could mess up your chain guides and other things...

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post #6 of 19 Old 10-23-2014, 05:03 PM Thread Starter
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i figured i already bought the part so i may as well install it, just trying to find a tutorial on doing so. I hear the noise echoeing from the right side of the bike where the chain is and then loudest out the front of the exhaust tubes where the exit the block.
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post #7 of 19 Old 10-23-2014, 05:08 PM
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Pull the old tensioner out. If you are mechanical, you'll see how they work. It's simple. I can't say for certain what design is on there. Self adjusters have a plunger that moves out to take up chain slack. Little grooves prevent it from returning. Resetting them is simple. You release that lock that keeps it from returning (might be a bolt head on the end) and reset the plunger all the way into the tensioner, then lock it in place and put it in the head. Then you just unlock it and it snaps out and you're done.

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post #8 of 19 Old 10-23-2014, 05:10 PM
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Dunno of you have seen this or if it is any help but here is a ninja 250 tensioner wiki thing...

Cam chain tensioner removal - Ninja250Wiki

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post #9 of 19 Old 10-23-2014, 05:12 PM Thread Starter
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thanks, just worried i guess that i will screw the kids bike up more, part will be here monday but i am picking up new plugs tommorrow, saw a video online with the same noise he is having and it was bad plugs, i can only hope.
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post #10 of 19 Old 10-23-2014, 05:14 PM
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Take your time and you'll be alright. There's nothing to it really. With any luck, one of those will cure it.

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post #11 of 19 Old 10-23-2014, 05:14 PM Thread Starter
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post #12 of 19 Old 10-23-2014, 07:15 PM
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be sure to put the motor at tdc before pulling out the tensioner

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post #13 of 19 Old 10-24-2014, 12:54 AM
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Originally Posted by KZScott View Post
be sure to put the motor at tdc before pulling out the tensioner
Now here is someone who ACTUALLY knows what he is talking about! Good advice brother!!
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post #14 of 19 Old 10-24-2014, 06:48 AM
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Were you waiting for that one? If so, you wasted it.

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post #15 of 19 Old 10-26-2014, 07:37 PM Thread Starter
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Thanks guys, tried the plugs first, a little better but noise is still there more on the right side of the bike. I put a wooden dowel on it with my ear to it and it seems like the chain area. What i am also finding out is he and his friend already pulled the tensioner out, without settinf it at tdc, looks like dad has some work to do now. New part will be arriving tommorrow but i wont be able to get to it until the weekend. Atleast it gives me some more time to go over the procedure to get the bike to tdc and possibly check the valves.
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