knocking at take off when cold

klehead · L Plate Warrior Joined: 18 Sep 2015 Karma :

Hello

My KLE 500 2007 with 35,000 klms.
I have noticed a knocking noise when the engine is cold when I take off.
Its like a deep tapping noise.
The bike does not do it when the engine is warm.
Is this something developing ?
Can I take the bike in to my mechanic for new big end shells ?

I welcome any advice or suggestions.

Thanks

Rogerborg · nimbA Joined: 26 Oct 2010 Karma :

klehead · L Plate Warrior Joined: 18 Sep 2015 Karma :

I use semi blend 10w-40 good quality oil.
It has been changed about 1500 klms ago.
It does not knock after I get moving or under load above 2500 rpm.
Good when the engine is not.
I just have never noticed it before.

Thanks

RhynoCZ · Super Spammer Joined: 09 Mar 2012 Karma :

''Good quality oil'' being? Thinking

Check the chain, could well be some dead links.
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'87 Honda XBR 500, ~~'96 Kawasaki ZX7R P1~~, ~~'90 Honda CB-1~~, ~~'88 Kawasaki GPz550~~, ~~MZ 150 ETZ~~
~~'95 Mercedes-Benz w202 C200 CGI~~, '98 Mercedes-Benz w210 E200 Kompressor

sickpup · Old Timer Joined: 21 Apr 2004 Karma :

Balance the carbs, if that doesn't work look at the cam chain tensioner and if that doesn't work its the primary chain so ignore it unless you want to strip the bottom end.

klehead · L Plate Warrior Joined: 18 Sep 2015 Karma :

I forget the brand, but its recommended and not cheap.
If your referring to the drive chain its not that, its got brand new chain and sprockets.
The noise I can hear is from the bottom end.
My klr 650 did the same thing but it was normal for the type of bearings.
Kle 500 has friction bearings witch are quieter and smoother, tell me if im wrong Razz

Its properly normal for this sound I just have never noticed it before.
If it does not get worse after a few klms I will not worry anymore.

weasley · World Chat Champion Joined: 16 Oct 2010 Karma :

Is it definitely not an exhaust/header gasket?
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~~Yamaha XJ600 | Yamaha YZF600R Thundercat | KTM 990 SMT~~ | BMW F900XR TE

Robby · Dirty Old Man Joined: 16 May 2002 Karma :

Do the easy things, then ignore it. If it's a big problem, it'll cost just as much to fix it now as it will to fix it when it fails.

sickpup · Old Timer Joined: 21 Apr 2004 Karma :

mentalboy · World Chat Champion Joined: 05 May 2012 Karma :

Is this a new problem with a bike that used to be quiet?

It's a Kwak and they are renowned for having noisy engines.

Check valve clearances, balance carbs, check CCT and, as Robby has already said, ignore if no better.

WD Forte · World Chat Champion Joined: 17 Jun 2010 Karma :

Have you tried singing "lalalalalalalalalalala !" really loudly as you pull away?
Works for me.
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bikers smell of wee