Question about 2001 kawasaki ZRX 1100 R

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ZRX1100 P reg (1990?) Runs nice and smooth, is as ecomical as usual, serviced recently (no carb icing). When cold and on tick over, there is a clatter as if something is loose. Using choke, noise goes away at 2000 rpm. When warm, noise goes away when on tick over. Seems to come from the alternator and I can feel something when I hold the casing. Can only be heard from left side of bike. No sound coming from clutch side.

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  • m_c_osborne Jan 25, 2009

    Thanks for that Van Kerr

    I've listened with clutch in and out, in gear and out of gear, no change in the noise. Sure it isn't cam chain either. Did service my self recently, so, not blowing own trumpet, I know everthing is right there. I've run a Honda CB 900 for 70,000 miles, so I'm used to all the odd noises an engine can make! I'm convinced it is to do with the alternator.What you say about that is interesting. Can you expalin more?

  • m_c_osborne Jan 25, 2009

    Please note: I am new to this web site stuff, so please excuse me if I send replys to the wrong places. I'm better with spanners, honest!

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Hei guys,i have a zrx 1100 it's a 2001 ,when you speed up in low gear first and second ,the compression is very high and the motor opens a safety pressure release valve that internally lets a bit of pressure off from the heads,and the opening and closing of that valve sounds like a gragragra buy thrust me it is absolutely normal ,no defect there at all,it's the sound of a device.

Posted on Aug 02, 2009

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Another thing to check - could be that your inlet camshaft journals or bearings are worn
Another possible cause of the rattle could be that at some point the camchain tensioner has been taken apart and the ball bearing which presses on the ratchet lock has dropped out. If the ball bearing has been lost, the end of the spring pops out of a hole in the side of the camchain tensioner and allows the tensioner blade to be pushed back, allowing excess play in the camchain.

Posted on Jun 22, 2009

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Hi ...... Does noise 'go-away' if you pull in the clutch ? Could be a few things, cam chain needs adjustment or replacement (35,000 miles-ish), rotor on some Kawasakis made up of steel centre,alloy middle & steel outer. Parts can become loose, short term solution is to centre tap/spot sections but ultimately replace rotor. Have you ever had the left casing off ? Is there a gasket fitted or a thinner pattern type fitted ? When was the last time valve clearences checked/changed ? Did they change shims on that side ?
Let us know how you get on.

Posted on Jan 25, 2009

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