engine noise on a VFR 06

[aminonholiday]

Hi there, I need some assistance. I have a VFR 800 2006, and recently it started to make a knocking sound at idle speed once the bike is warmed up. however if you rev it up past 2000 rpm the sound fades away.

I am really confused, short of going to garage and as i am broke this is not a option at present.

Any help would be greatly appreciated.

[misscrabstick]

Does noise change when clutch lever pulled in?

[aminonholiday]

No the noise is still there,

[gavcarter]

Can you tell which part of the engine its from? Big old screwdriver against your ear and touch the end of it to all the different casings and housings will help you narrow it down, or at least let you know what area of the engine its coming from.

Could be tappets, slight exhaust leak, valve noise, gear back lash, water pump, oil pump, Basically theres a lot of bearing and a lot of moving part of the engine can be described as "knocking " at low revs if somethings wrong.

[aminonholiday]

i did just that, and the noise is loudest by the sprocket, how ever you can also feel it where the spark plug. when you first start the bike, it sounds fine - but after riding for ten minutes the noise starts, its very prominent when you stationary, as after 2000rpm it disapears

[temeluchus]

Perhaps the throttle bodies need balancing? Out of balance throttle bodies are more noticeable with the engine idling warm.
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[Vincent]

Cam chain tensioner?

It can be noisier at idle.

What's the mileage
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[aminonholiday]

The milage is 51000 -

[Vincent]

CCT's can go after as little as 30K miles I'm afraid. If it is this, look into fitting aftermarket manual tensioners, they last much longer....as long as you don't mind adjusting them yourself, (very easy to do), every few thousand miles.
I think the rear tensioners tend to last longer than the front so you may find the front one has been replaced already.

Have a look on the American VFR forum.....'name escapes me right now ....you'll find all the relevant info there.
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[sprintster]

Do VFR's not have gear driven cams,not chains

[Vincent]

[bikenut]

:D 51,000 ....so its got 51,000 miles of wear then....how many owners and how old??

see cmsnl for the internals, make sure you are seated when looking at the prices..........

so noise the same with clutch held in, held in for say 20 seconds when hot so all rotating stuff after the clutch has stopped........or drop it in gear .............

you said you could feel it by the plug......any oil leaks or staining there...is plug loose....

but loudest by the sprocket....see cmnsl for whats by there inside......

any oil light issues and any metalics in the oil and filter at last oil change.......

you may have a big end issue.........which cylinder plug makes most noise remove plugs and watch piston movement to crank rotation for "play"............or loss of piston movement relative to crank meaning play in that big end.........the louder sounding plug cyl's piston may be different to the others.........mid stroke as well as tdc/bdc...........if bearing issue you may hear the "clunk"....on the bad one......but compare all cyls/pistons.

pin point the noise more accurately before taking it to bits....... :karma:
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[stinkwheel]

For what it's worth. The clutches can get pretty rattly on the 750 models. My last 750 had a really badly notched basket after about 35k miles. I took it off and filed the notches back but this left room for the tags to flap about a bit so it was still rattly.

I finally dealt with the problem by simply ignoring it until such time as I had a problem with the clutch, which I did not.
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I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[sickpup]

[Vincent]

Jeez.......is it that time of the month again already?
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[Vincent]

OP, if you're still with us, some threads that may help you out:-

www.vfrdiscussion.com/forum/index.php/topic/73590-intermittent-ticking-from-engine-6th-gen/?hl= manual cam chain tensioner

www.vfrdiscussion.com/forum/index.php/topic/73035-whats-this-weird-noise/?hl=%2Bmanual+%2Bcam+%2Bchain+%2Btensioner#entry862390
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[_Iain_]

[c_dug]

Are you sure it's not just the exhaust leaking on a downpipe?
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[sickpup]

[Vincent]

It aint what you say...............it's the way you say it.
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[sickpup]

[Vincent]

What I said, while maybe a mistake, was said as part of trying to help someone out. From what I can make out, the conversion to manual tensioners is a popular one as the OEM tensioners were defective and have been known to start making a knocking noise shortly after installation. From what I can make out, it's a lot easier to adjust a manual tensioner once than it is to replace both tensioners several times after the same mileage. The only problem with the manual tensioners, (at least the APE ones), seems to be that the locknut can work itself loose so requires something to stop it moving on the thread.

IMO, what you said, was sarcastic in an attempt to belittle.

You could have just said something like:-

" I don't think the manual tensioners are easy to adjust" for eg.

I see lots of this on forums and, to me, people that trawl workshop forums to find mistakes and then make some sarcastic comment put themselves in a very poor light. I'm not sure the reason for it, maybe some people see it as an opportunity to make themselves look good....but somethings not right.

"Sarcasm is the lowest form of wit"....as they say.
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[bikenut]

:D cmsnl are brilliant for the exploded views which show what type of valve clearance metyhod may be used in your ebngine, or if there are 2 cam chains for the cam shafts and you can find where the f that hidden c/case bolt is etc etc etc as well as part numbers and prices etc................a wonderfull resource if you about them and how to use the site..................didnt know wemoto, although very good, stocked c90 valve guides, be carefull putting it in and making serviceable............
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[Walloper]

A man I know had a VFR that was TLC-ed to fcuk by him and the local Honda dealer.

The gudgeon pin drifted out the end of a piston, scored the bore and cost a new engine.
Whilst developing over a minute or two it produced the most hoorish sounding 'Big-End Clatter-Timing chain tensioner Rattle-Sum Ting Wong noise ever.
It required a strip down to it's underpants to find the culprit.

Most engine noise is not easy to determine unless there is prior experience or other supporting evidence such as jewellery in the oil filter.

In other words it could be a number of things or nothing but your paranoia.

I don't even believe anyone can do much good with a screwdriver except hear the noise louder. Unless they know what to listen for.
Noise can resonate from the arse-hole to the ear-hole of an engine which illustrates nothing much.
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[sickpup]