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Anonymous Posted on Feb 04, 2014

Cam chain rattle when engine is idling - CBR 1000 F Honda Motorcycles

1 Answer

Stacy Hall

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  • Contributor 51 Answers
  • Posted on May 06, 2015
Stacy Hall
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This bike is well known for cam chain rattle, but it has an automatic tensioner so there are no adjustments. If the bike runs well just ride it. I have a friend that had his cam chain, tensioner and guides, and in less than a couple years it was making the same sounds. If the bike run rough then it is a possibility the chain has stretched and unless you are confident with timing issues take it to a pro.

5 Related Answers

Anonymous

  • 8 Answers
  • Posted on Mar 20, 2009

SOURCE: cam chain rattle

have a real mechanic check the timing chain guides, you may even need a new one, sometimes they stretch.

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tombones

  • 3567 Answers
  • Posted on Apr 23, 2009

SOURCE: engine rattle when bike is under load

This sounds like a classic case of pre-ignition, aka detonation and engine knock. Change to premium gas and put in a set of spark plugs that are one heat range colder than stock. It is good that you are handling this before the engine destroys itself. Yes, destroys itself. That is what pre-ignition will do. Hot carbon deposits ignite the fuel before the spark plug does. This is hard on the rod, main bearings and piston. Beat on the top of a piston with a hammer. That is what your piston will quickly look like with pre-ignition.

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Anonymous

  • 221 Answers
  • Posted on Dec 05, 2009

SOURCE: GS 650 cam chain rattle

do you have manual or auto. cam tensioner sounds like the problem

czaa

Arnie Burke

  • 7339 Answers
  • Posted on Dec 30, 2009

SOURCE: 1997 XL 1200 Custom has chain rattle from engine

better buy a clymer manual or bring it to a tech soon

sisadsl

gavin jones

  • 1508 Answers
  • Posted on Mar 16, 2011

SOURCE: Hi. Suzuki rf600r 1993.

a 93 model is likely to need a chain and tensioner, if you undo the tensioner mounting bolts it should spring out 10-15mm

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I own a 2004 BMW R1200CL. Almost every time I crank the engine I can hear the valves rattle. I have checked and adjusted the valve clearances to spec. The rattle goes away after the engine starts, but...

Yep, most of these bikes do rattle on startup. The noise is from cam chain slack. A hydraulic tensioner is used in the engine on each side as there are two cam chains. The tensioner leaks down after the engine sits for a while and the chain rattles for a few seconds till the tensioner gets pumped back full of oil again. Once the chain is tight again, then no noise.

BMW came out with an improved tensioner (doesn't leak down as quickly) that you can install on your engine to fix the rattle. Note that it is much easier to change the RHS tensioner than the LHS one.

Good Luck!
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Very noisy engine at idle Rattles like cam chain. Noise goes away as you rev the engine. What do you think it could be?

Could be the carbs are out of balance as this will cause lash noise at the primary drive gears as these are straight cut gears.
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Noise from engine a rattle

does it sound like a chain rattle if so could be either cam chain tensioner needs replacing or even the cam chain itself is the noise bad because all chain driven cam engines make some noise
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GS 650 cam chain rattle

do you have manual or auto. cam tensioner sounds like the problem
1helpful
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Rattles at low reves only

THE RATTLING YOU HEAR AT LOW R'S IS MORE THAN LIKELY THE CAM CHAIN RATTLING. THE CHAIN TENSIONER IS ADJUSTABLE TO A DEGREE BUT A BIKE OF THIS AGE(IF OVER SAY 10000 MILES) MAY NEED A NEW CHAIN TO ALLEVIATE THIS PROBLEM. LOOSE CHAIN CAN CAUSE CAM TIMING TO VARIATE CAUSING A SLIGHT MISFIRE.
THIS MISFIRE COULD ALSO BE THE RESULT OF DIRTY CARBS. IF SO THEY WILL NEED CLEANING AND SYNCING.
0helpful
1answer

Poss loose timing/cam chain!

Cam chains are self adjusting. They have a tensioner that takes up slack as the guides wear and the chain stretches. You may be able to get away with new guides if your chain isn't too stretched. Look for pieces of plastic in the oil, which will signal work guides. It is possible you are hearing the valves rattle, and it would be time for a valve adjustment.
1helpful
1answer

Cam chain rattle

have a real mechanic check the timing chain guides, you may even need a new one, sometimes they stretch.
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