knocking noise

[thedon1000]

hi there

iv just recently passed my Direct Access and bought my self a 1999 sv650s
its got loads of extras (data system3 alarm, scott oiler etc...)
it only done 19000miles

ok i didnt notice the noise at first, (probably over was so happy i had just got my bike) but yesterday i took it for a little ride and when i got back i noticed a loud knocking noise coming from the engine (same area where you would fill it up with oil.)

any sugestions what this could be ? people are telling my its not worth looking into an i should just buy another engine ?
any suggestions on what i could do to check what this could be.

[xXBADGERXx]

Another member on here had a similar noise and it turned out to be some loose spacers under the tank near the Carbs somewhere .

Welcome to the site by the way :D , have asked a Mod to move this to the correct area so that you will get more responses .

[thedon1000]

thanks mate.

[fizzwheel]

Moved to correct section.

OK knocking noise coming from bottom end of engine, may well be terminal.

How much oil has it got in it and when did you last check it.

If it is the bottom end gone ( and I'm not mechanical enough to positvely say yes or no ) then your friends are correct economically it may well be cheap to buy another complete engine than get yours rebuilt, but you need to be sure exactly what the problem is IMHO.

[thedon1000]

the oil level is fine and the oil and filter was apparently changed 3000miles ago.

just started the bike up i can hear the noise but its not as loud as it was last night.
im going to do a quick check on the engine with a screw driver and my ear.

[thedon1000]

noise is coming from below the rear cylinder.

[Dangerous Dave]

How does the noise sound with the clutch pulled in, better, worse, or the same?

[Dave20046]

Is it high or low pitched? won't mean anything to me but I think if it's high pitched (could be wrong, then it's the terminal one - read it ages ago so soz for uselessness but hopefully it'll promt another forummer)
My engine knocks loads I probably should worry about it more than I do, I've just kind of assumed the cam chain tensioners need doing and that it's generally a noisy twin...ignorance is bliss :smt020

[Dave20046]

How does the noise sound with the clutch pulled in, better, worse, or the same?
Mine get's better! worried me now dave

[Dave20046]

........?

[thedon1000]

noise is the same when clutch pulled in.(so its not the clutch)
the noise is a constant knock, (not in time with the engine or rev's)
would class the knock as slow.

iv been told it could be a bearing (water pump, or clutch bearing)
and a few other people that have listened say it could be clearance of my shims, (like tappets or valve clearance)

iv been advised to do a service (oil oil filter and brakes) an not to worrie about the noise unless it gets worse.

oh i forgot to say the noise or knock is only on tick over (when the bike is idleing) as soon as there is force on the engine the noise goes away.

[lukemillar]

oh i forgot to say the noise or knock is only on tick over (when the bike is idleing) as soon as there is force on the engine the noise goes away.

Goes away or just can't hear it anymore?!

[thedon1000]

it goes away, all together.
there is also no loss in power or performance.

if i increase the rev's bit by bit the noise stays the same then goes away. (noise dosnot increase in speed or in volume it just goes away )

[thedon1000]

im going to service it this next wknd (check all the basic stuff, read somwhere on this forum that a loose spark plug could be rattleing so will check everything i can )

might attempt to check shim clearance (tappets depends on if i have to take the engine out )

would anyone know of any good garages around bedford that wouldnt mind listening to it.

[yorkie_chris]

Won't be tappets. You don't need to drop engine to adjust them.

Major bottom end problems usually show as a loud knocking or rumbling. I don't think this is your problem. I reckon somethings just loose.

[Bibio]

sounds like a loose ancillaries, air box or fuel tank. etc. etc.

[thedon1000]

thanks for all you help an advice.
if weather is good this coming wknd ill do the basic check and tighten things if they are loose. (check tank mounting spark plugs, an probably check the timing chain tensioner )

change the brake pads front an back, then oil an oil filter.

will repost if i come across anything before then.

but in the meantime if anyone has any other suggestions please feel free to add or comment

[thedon1000]

oh i forgot to ask how can the noise come from the tank mountings if the noise is coming from the engine ?? area

[thefallenangel]

noise is a very misleading thing. And also if the tank is vibrating and creating this noise won't it just appear to travel down?

[thedon1000]

iv adjusted the cam chain tensioner (turned it clock wise an checked it was sprining back to position.) i turned it both ways clock wise an anti clock wise (extending and contracting the adjuster.)

the noise seems to have gone away i will take the bike out for a ride after dinner an let you all know if its there when i get back.

[kwak zzr]

i give up listening for knocks, ticks and rumbles on my sv, all bike engines make weird noises if you sit and listen, personaly i'd ignore it jap engines are strong.

[thedon1000]

ok good news

the noise went away for like 2min, after the ride it was back again.

just serviced the bike new oil and filter an the noise is gone all together.
will ride it on wknd then see if its still there.

think the problem was caused by the tensioner and old oil. <low grade>

[Lou M]

Cheers Guys!
I've got exactly the same symptons on my old Fiat!!! I'm going to call my mechanic to have a look over, but feel happier that it's possibly not terminal.
Bought the car for my daughter to learn to drive in and even though that's still a year and bit to go, she loves the car and it's perfect for her, I would hate to scrap it.

Lou