You do not need a manual tensioner. And that type of addition you either better have done it before or learn how to. Or have professional do it. Heres how you do it if you feel lucky.take the side fairings off and lift up the gas tank. you must then most likely take the exhaust header off. There are two engine bolts that go through the main frame to mount the engine (the bolts that hold frame sliders on).Now you can tilt to engine down if you loosen the bolts in the back of the engine that mount it. You will have to do some searching to in them. Make sure your key is out of the ignition so you make sure noone accidently turns the motor over while your working. Take off any wires etc on the valve cover and pull them off. (some people wont do this but I highly recommend). Now that the valve cover is off you can see you cams, valvestems and cam chain! You;ll notice it is under tension. you can now loosen the cam chain tensioner on the side. Some people might tell you to find TDC (top dead center). You do not need to. Just 100 percent make sure you just keep enough tension on the chain and do not bump anything that could cause the engine to move out of timing. So now that the tensioner is out bolts your new on the the right torque specs, make sure gaskets are on, most likely copper gasket or something. Take the center bolt on the tension and tighten to the right specs. Not to tight, not to loose that super important! Now you got it together. Not take the side plastic bolts out to be able to turn the crank with a rachet, and be able to see in the top hole to find tdc. match up the tick marks correctly with tdc and cam tick marks. A service manual will be able to tell you exactly what degree everyhting should be at (timing wise). If you dont bump the eningine and make it skip a tooth theres no need, But I always check so you can make sure yo do not damage the engine. I might have a servie manual the kawasaki one on a pdf. format. I will check for you. Now some bike you do not have to let the engine pivot down to take the valve cover off. I have done amny engine, all are different.
And besides that I would not sweat it, kawasaki always have had outrageously loud valve trains! And most likely always will! I ahve a mojave 250 atv for 5 years that was the onl;y thing that I ever had to really fix, valve seats needed to be cut, new valves, cams etc.
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