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horrible top end loud ticking noise
Posted: Tue Dec 23, 2008 9:23 am
by NC
Some say that this is nothing to worry about it is more like a ticking noise and seems to go away once rolling any ideas on what is goin on would be good cheers
Pete
Re: horrible top end loud ticking noise
Posted: Tue Dec 23, 2008 9:40 am
by MexicanGringo
Had the same problem on the engine i just rebuilt, sound would only start once engine up to operating temp, and would only be noticeable at idle.. I didnt notice any signs of damage to pistons,head or valves so it isnt a mechanical knocking of these, but more likely caused by weak valve spring causing a tap between the top of the valve and the rocker on return.. Could also have been excessive clearance on big end bearing, one of mine was quite scuffed and as i havent finished puttin engine back together i cant say for sure if any of the above is the cause.. The sound got progressively louder on mine so i think it is something to have looked at eventually, but il let you know once my engine bak 2gether if i cured the cause
Re: horrible top end loud ticking noise
Posted: Tue Dec 23, 2008 12:42 pm
by Cammo
It is pretty normal on these engines.
It's more noticeable at high temps at idle (e.g. more than a couple of minutes), I've had it on all my nc's, even after valves have been adjusted.
Get on it and enjoy!!
Re: horrible top end loud ticking noise
Posted: Tue Dec 23, 2008 7:37 pm
by trademe900
Stickshift wrote:It is pretty normal on these engines.
It's more noticeable at high temps at idle (e.g. more than a couple of minutes), I've had it on all my nc's, even after valves have been adjusted.
Get on it and enjoy!!
Yes this guy is right. this is normal. I've had 3 NC30's and they all have this even with good valve clearances and off clearances. Also, I've got a fair few NC30 mates, including RVF400 and they all have that top end ticking sound.
I once heard some guy explain what this is and i think it's something to do with a small gear around the camshafts that when worn to a certain point just makes a sound.. I think something called a scissor gear? Anyway, it's that. Maybe it just gets worn or something after a point where it then produces the noise... because there are SOME bikes that don't yet do it...
Get on that thing and ride it!!!
Re: horrible top end loud ticking noise
Posted: Wed Dec 24, 2008 9:25 am
by NC
Love what i'm hearing here ,got new oil and filter ,goodridge hoses, renthal sprockets , wheels with slicks all ready to do now
but I got to finish the f***ing bathroom first !
One more thing guys do I need to take off the exhaust to remove the suspension linkage wishbone as I need to get it altered for the 17" rear
Cheers you know your shit on this forum
Pete