Top end engine noise

[Namso]

Help me, 2 dealers have told me my bike has some sort of engine problem, I didn't notice the noise ( I thought the noises it was making were normal ) the Honda service centre said the noise was from the top end, they advised me that it would be 2-3 hours labour just to get at the engine and identify the problem.

Made a video of the noise, can anyone help identify the problem or provide any insight at all?

https://www.youtube.com/watch?v=XM1lVX7SSI4&feature=youtube_gdata_player

[neil.]

Before you start ripping the engine apart, I thought I saw your exhaust header blowing, which would cause that sort of noise - check that the 2 nuts holding the exhaust flange to the cylinder head are tight - usually about 10Nm. Maybe even replace the exhaust gasket, but be careful if you do choose to attack those nuts as they are prone to seizing with the heat/rust. Soak them in penetrating fluid like Plusgas for a while beforehand.
____________________
CBT February 2008 | A2 June 2008 | Yamaha YBR125 (written off) | Honda CBF125 (current)

[MaybeGuy]

Definitely looks like a blowing exhaust. Don't try and tighten the bolts whatever you do, they will only snap. Take them off and see what your exhaust state is, if it's fine, replace the gasket and put it back on.
____________________
Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[Namso]

I already started disassembling the bike to get at the engine. Sorry for my lack of part name knowledge but when taking off the exhaust the bit behind the bolts (the oval shaped bit ) was in 2 pieces and the exhaust was very difficult to get out, used loads of wd40 with some hammer knocks and ended up using the hammer as a level to force it out

[P.]

Well..

Until it sounds like this https://www.youtube.com/watch?v=gvwjwYJY_u4 you should be ok.

Thats my CBR when its cam bearing decided it wanted to die, its a known fault on 20,000+ mile engines. People neglect the oil filter on this bike...and it causes oil starvation to the cam area.. fun fun fun.

Doesn't sound as malicious as that so as above, check the exhaust.

[Namso]

Paddy did your engine die due to oil problems? your noisy engine sounds just like mine except louder and more constant

Extra info: I think my bike has been stolen recoverd before, non honda keys and a wire coming from the ignition doesnt match the other wires around it (plastic connectors through a metal tab for various bits such as ignition and raditor fan, the ignition wire has nor plastic connectors it has crimp connections) and spending the whole day trying to get to the engine (never done anything this ambitious before) I realise my bike is crap

pics of removed exhaust section:
https://img526.imageshack.us/img526/8081/img0633kr.jpg

Uploaded with ImageShack.us

https://img703.imageshack.us/img703/249/img0634ep.jpg

Uploaded with ImageShack.us

[MaybeGuy]

There's still a copper washer in your engine. Clean it up and heat it up on a gas cooker for a while and you can re-use it.

2-3 hours to diagnose what people can see in a video? This is why I fucking hate mechanics and think they're all incompetent pricks.
____________________
Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[Namso]

[P.]

Clean up the hole after removing that gasket. You can re use them, for the price I just replace them but if you don't have one to hand you can try it.

Tighten them back up equally... do 4 turns on each with a socket or something just so its being squished on straight.

[MaybeGuy]