marc1
CBT failure
Posts: 15
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Post by marc1 on Mar 30, 2012 23:42:27 GMT
Hi,
Ive recently bought a 2000 xj600s and have a tapping from the engine. Its more noticeable at idle and gets quicker on blipping throttle. It doesnt stop when the clutch is engaged, and you can hear it when riding at low speeds, obviously the quicker you go the less you can hear. Not having any experience with bike engines before it sounds kind of like tappets off an old mini. What could it be?
Any advice would be great, can i upload recording of noise?
Thanks
Marc
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Post by neilmud Lord Protector on Mar 31, 2012 0:33:00 GMT
If you are running old Mini tappets in your D6 that could be the source of the noise ;D
Best way to upload noise would be to video the bike & upload to utube & paste a link using the "Tube" button in the tag line.
Neil
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Post by bobh on Mar 31, 2012 11:23:20 GMT
A small leak from the exhaust can make that sort of noise, so it's worth inspecting it closely while it's running, at say a fast idle.
But the chances are it's just a tappet at the high end of its clearance tolerance - usually an exhaust valve, as they have the larger clearance. If they've never been checked it's worth doing, and it's not hard. Changing the shims is a bit fiddly, and ideally needs a special tool (which I could lend you), but is nowhere near as complicated as most dohc engines.
The trickiest bit is making sure you don't damage the oil cooler when you take it off, which you have to to get the cam cover off. It's very easy to break the seal between the hexagonal bosses and the oil cooler body if you don't back-hold the hex while loosening/tightening the banjo bolts.
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marc1
CBT failure
Posts: 15
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Post by marc1 on Mar 31, 2012 13:14:25 GMT
This is the sound it is making at idle, as you can here on increasing the revs it disappears.
Tappets? Cam chain?
Thanks.
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Post by showaddydadito on Apr 2, 2012 11:27:10 GMT
Mine sounds like that - since I replace my exhaust and when I put it on I just knew that I had got one of the gaskety ringy sort of thingies out of place when I shoved the pipes in the front of the engine but I was cold, tired and old and couldn't be ar5ed to re seat it all.
So I'd be looking at the exhaust first before panicking about anything else.
Put a screwdriver in your ear* and stick the other end on the engine and listen - this lets you hear the inside of the engine and might help you to know if it really is a knocking sound from inside. Mine sounds smooth as silk inside.
* IMPORTANT NOTE: handle end of screwdriver in ear and blade end on engine, otherwise you get a sharp pain in the ear, followed by silence. As you dance around the garage clutching the ear and groaning, you can hear distantly, in the other ear, the sound of a motorbike engine with a funny knocking noise.
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marc1
CBT failure
Posts: 15
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Post by marc1 on Apr 2, 2012 20:19:12 GMT
ok cheers will have a look/listen.
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Post by CD on Apr 3, 2012 8:10:23 GMT
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Post by showaddydadito on Apr 3, 2012 11:40:10 GMT
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Post by CD on Apr 4, 2012 18:35:24 GMT
Don't forget the snood & white boots.  |
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