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post #1 of 11 (permalink) Old 12-13-2008, 06:30 PM Thread Starter
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Engine noise

With the cold weather- how do you guys' engines sound on cold start?

My motor cranks over and starts fine, then rattles and bangs around for about 15 seconds. After the oil gets pumped around, it sounds find around 2k rpms while its warming up.

When I take the choke off, I get a really weird occasional knock coming from the upper side of the engine. It is somewhat quiet, and does not happen on every revolution. The sound becomes much more prominent if i bring the idle below 900 rpm's. Any diagnosis?

If I keep the idle at 1400 or so, it sounds fine and I don't get the occasional knock.
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post #2 of 11 (permalink) Old 12-14-2008, 11:50 AM
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These bikes are notorious for making noise. valves, pistons, who knows. Mine makes clicking noises but runs fine. If it rides fine, i say ride it til it doesnt ride fine. ;)
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post #3 of 11 (permalink) Old 12-21-2008, 02:46 PM
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Originally Posted by Ian_zx9r View Post
These bikes are notorious for making noise. valves, pistons, who knows. Mine makes clicking noises but runs fine. If it rides fine, i say ride it til it doesnt ride fine. ;)
...mine makes a noise upon cold starting in the upper right side of the engine, right around the CCT area. And like you said, once the oil starts flowing, it quiets down mostly, but I don't think weather has anything to do with it...it's just as noisy in summer as in winter! lol I also changed out the CCT in 2006, just as a preventive measure.
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post #4 of 11 (permalink) Old 12-22-2008, 10:04 PM
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Cool noise

wrist pin
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post #5 of 11 (permalink) Old 12-23-2008, 11:25 AM Thread Starter
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wrist pin
thats a pretty specific diagnosis for someone that has never actually heard the bike! hah
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post #6 of 11 (permalink) Old 12-23-2008, 12:19 PM
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thats a pretty specific diagnosis for someone that has never actually heard the bike! hah
It's def the hanna canna poonah reevershram gear ring. I think there's a recall bulletin on it.
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post #7 of 11 (permalink) Old 12-30-2008, 10:17 PM
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different models years have different distinctive sounds mine sounds like a honda when I put it to my friends 95 that sounds like a JD tractor on steroids, but then again if I put mine next to a honda it too sounds like a JD on steroids

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Last edited by Nal; 12-30-2008 at 10:19 PM.
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post #8 of 11 (permalink) Old 01-09-2009, 11:36 AM
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hi there, my 00 zx9 also makes that noises, but when i pull the throtlle i just hear a very powerfull noise.
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post #9 of 11 (permalink) Old 01-10-2009, 06:31 AM
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The older and higher mileage your engine is, the noisier it will be on two counts; 1. The most obvious thing is wear and increased clearances in mating parts. Keep those valve clearances to spec. 2. As noise standards have tightened over the years, the OEMs have made effort to quiet mechanical noise by various methods; thicker case covers, noise absorbing material added to parts and panels and engineering strategies such as cam profiles, valve train geometries and noise deadening materials on sliding surfaces such as cam chain tensioners. Change the oil regularly, do the routine maintenance and ignore the little rattles because they'll drive you nuts if you're a worrier.

It may be a pig, but it's a pig with a rocket in it's ass!
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post #10 of 11 (permalink) Old 01-30-2009, 01:51 PM
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my old c1 model took a few seconds for the oil to reach the top of the motor but when it did it was quiet, i now run a e1 model, the oil gets round the motor much quicker but has a noiser motor at tickover, both were dam quick bikes.
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post #11 of 11 (permalink) Old 01-30-2009, 02:10 PM
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An intermittent knock at cold idle could be stalling causing the primary gears to clank together. Nothing serious, just a lack of smooth running. Give it a little more "choke" but back it off if it zings up to 6K.

It may be a pig, but it's a pig with a rocket in it's ass!
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