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CB500 EXHAUST REMOVAL

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sullivj
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Re: CB500 EXHAUST REMOVAL

Post by sullivj on Wed 16 Apr 2014, 12:46 pm

In case anyone other than me is still interested, the exhaust is back on now..

I put a bit of grease on the new gaskets to hold them in place before fitting and put some copper slip on the studs to aid future removal.

Just been for a blast to 'cure' the VHT paint. It's lovely out there.

Well, that's it - job done!

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jonny10
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Re: CB500 EXHAUST REMOVAL

Post by jonny10 on Wed 16 Apr 2014, 1:10 pm

I doubt if there's a CB exhaust, anywhere on the planet, which has ever been lavished with such tlc.
If you keep that up, it'll outlast the engine! Great job!
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teamster1975
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Re: CB500 EXHAUST REMOVAL

Post by teamster1975 on Wed 16 Apr 2014, 2:07 pm

Better than factory Sully!
You live down near Gatwick don't you? I might have to bring a few tinnies round and ask for your advice on painting the lower fork legs on mine as they are a right furry mess.

sullivj
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Re: CB500 EXHAUST REMOVAL

Post by sullivj on Wed 16 Apr 2014, 5:05 pm

Yes I do. You'd be more than welcome.

Before I got mine, someone had stripped the paint off mine and polished them up. I just give them a wipe over with ACF50 every now and again. I think they look nice.

Next job is to take the clutch and generator covers off to paint those.

sullivj
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Re: CB500 EXHAUST REMOVAL

Post by sullivj on Fri 30 May 2014, 8:31 pm

Just by way of brief update... 

The slightly 'rough' finish of the VHT  didn't take well to getting wet and dirty.

So, with some trepidation, I polished the roughness of the VHT and now it's smooth as a baby's bum!

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teamster1975
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Re: CB500 EXHAUST REMOVAL

Post by teamster1975 on Fri 30 May 2014, 9:31 pm

Blimey! They look as good as the frame!
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eternally_troubled
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Re: CB500 EXHAUST REMOVAL

Post by eternally_troubled on Sat 31 May 2014, 3:37 pm

What did you polish them with and how did you do it? Looks good btw...
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cb1300rider
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Re: CB500 EXHAUST REMOVAL

Post by cb1300rider on Sat 31 May 2014, 10:23 pm

I take my exhaust off once a year for a bit of tlc.  In between this, as and when needed, i apply zebra grate polish with a tooth brush to the headers, quick buff with a micro fibre cloth and they look great.

sullivj
the 900
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Location : Gatwick

Re: CB500 EXHAUST REMOVAL

Post by sullivj on Sun 01 Jun 2014, 12:12 am

@eternally_troubled wrote:What did you polish them with and how did you do it?  Looks good btw...

Just Autoglym super resin polish and a polishing cloth. It was only a quick rub over.

I think it will make them easier to clean.
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Grarea
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Re: CB500 EXHAUST REMOVAL

Post by Grarea on Tue 22 Nov 2016, 6:43 pm

@sullivj wrote:
I put a bit of grease on the new gaskets to hold them in place before fitting and put some copper slip on the studs to aid future removal.


You know you needed grease to hold them in place?
The ones I got kind of didn't really fit.
I had to really wedge them in. It kind of distorted them a bit.
I would have said that they were too big.
I had to use them though as i needed the exhaust back on for tomorrow.

Were yours loose and would fall out without the grease?

sullivj
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Location : Gatwick

Re: CB500 EXHAUST REMOVAL

Post by sullivj on Tue 22 Nov 2016, 8:47 pm

Yes, they would have fallen out without the grease. They were Honda ones -were yours?
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Grarea
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Re: CB500 EXHAUST REMOVAL

Post by Grarea on Tue 22 Nov 2016, 8:49 pm

yes, i got them from Lings.
(I think)

I might have to check this out.
Cheers

sullivj
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Re: CB500 EXHAUST REMOVAL

Post by sullivj on Tue 22 Nov 2016, 9:17 pm

Did you remove the old ones first, and make sure that someone before you didn't leave some in?

Also, run a pick around the hole to remove excess carbon?
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Grarea
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Re: CB500 EXHAUST REMOVAL

Post by Grarea on Tue 22 Nov 2016, 9:56 pm

Yes, (well, no to using a pick, but I scraped about with a screwdriver)
They just didn't get in that far in the first place.
They were too big for the orifice.



Anyway, I have just looked up the part numbers that are on the bits online and they are for the cb500f.
I shall have to see if it was my fault or theirs.
I will dig out the receipt.
It didn't sound too bad when i started it up, but i think there was some leakage.
I shall find out tomorrow what it is like.
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eternally_troubled
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Re: CB500 EXHAUST REMOVAL

Post by eternally_troubled on Wed 23 Nov 2016, 8:07 am

@Grarea wrote:Yes, (well, no to using a pick, but I scraped about with a screwdriver)
They just didn't get in that far in the first place.
They were too big for the orifice.



Anyway, I have just looked up the part numbers that are on the bits online and they are for the cb500f.
I shall have to see if it was my fault or theirs.
I will dig out the receipt.
It didn't sound too bad when i started it up, but i think there was some leakage.
I shall find out tomorrow what it is like.



Did you buy them online or in a shop?

If it was  shop then it's their fault - you said 'can I have some exhaust gaskets for a CB500?', they should have said 'what year?'

If you bought them online then that will be your fault :)

You can see why no-one wants to have a shop any more....

I think the Honda part number for the correct gasket is 18291-MN4-920.

As an aside, you can get two non-Honda ones from wemoto for about £5.50 delivered - http://www.wemoto.com/bikes/honda/cb_500_v/97-98/picture/exhaust_gasket_front_-_copper/ - obviously will be cheaper if you are ordering something else as well.
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Grarea
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Re: CB500 EXHAUST REMOVAL

Post by Grarea on Mon 23 Jan 2017, 2:07 pm

Right, thanks.
(I have at last got the time and space to try and work this out)

Well, I got them from Ling's. I am right in thinking people here recommend them don't they?
So, I was frustrated but had to run it as it was for a while.
The guy at Ling's, I have to say was really helpful.

So, assuming that the wrong ones came out to me, he kindly sent me some more.

So, I have just taken the exhaust off again.
They definitely need forcing into the spot.
I think they have sent me the same ones.
The part number is 18291-MN4-920 as you say.

It doesn't get past the lugs without me pushing it in and deforming it slightly.
(When I say lugs, i mean the four solid metal bits that stick out around the hole)
It is the same as the other ones.
I measured the gap between the lugs (ish as the access isn't brilliant) at approx 41.8mm.
The external of the gasket itself is 43.1 ish.
IMGP8568 by chuffedas, on Flickr

This is it kind of wedged into place, having pushed it out of shape a bit but to get it into its place needs more deforming.
That photo looks like it is more in place than it is.


Also when i look at the old one, it shows that the pipe sat centrally 
IMGP8567 by chuffedas, on Flickr

Whereas when you look at the ones from last time, they are on the outside if you know what i mean?
They are just too big aren't they?
You can see where I had to deform them to get them into place.
Also, where they are blowing.

IMGP8569 by chuffedas, on Flickr

IMGP8571 by chuffedas, on Flickr



Am I going mad or are they sending me too big gaskets?
Or is there something to check whether I have a different engine or something?
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Fair Weather Rider
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Re: CB500 EXHAUST REMOVAL

Post by Fair Weather Rider on Mon 23 Jan 2017, 7:22 pm

I have found with bikes I've had, if when you are cleaning the bike just get a 10mm socket, or whatever size your studs are and just undo the nuts on header pipes a half a turn and then tighten them up again,
this seems to work for me and it doesn't give the nuts chance to seize on the studs.

Happy days.
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eternally_troubled
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Re: CB500 EXHAUST REMOVAL

Post by eternally_troubled on Tue 24 Jan 2017, 8:40 am

@Grarea wrote:
Well, I got them from Ling's. I am right in thinking people here recommend them don't they?
So, I was frustrated but had to run it as it was for a while.
The guy at Ling's, I have to say was really helpful.


Am I going mad or are they sending me too big gaskets?
Or is there something to check whether I have a different engine or something?


I bet you don't have a different engine :)

I wouldn't say I recommend Lings - they just have useful website and sell Honda parts online.

They might be sending you gaskets that are too big, but then they are *supposed* to deform when crushed by the exhaust/head being pushed together.  I'm pretty sure that I had to use some copper grease to 'hold' mine in the holes on the head while I put the new exhaust on.

This sounds dumb but how well have you cleaned out the circular recesses on the head?  I can guess any grot in there won't help (sorry if you have already done this!).

<pauses a second to look at photos>

Right - look at this one of your photos - you do know that you've got the old gasket still in there?!  I can see it peeking out fro under the new one! It's all flat and squashed. Suffice to say that you probably know this, but if you don't then I might have found the problem... get it out of there!


Failing that both David Silver, Wemoto and CMSNL have 'suitable' gaskets. You might be able to ring them up and get them to measure one....
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Grarea
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Re: CB500 EXHAUST REMOVAL

Post by Grarea on Tue 24 Jan 2017, 8:53 am

Yes, thanks, but yes I am aware of that.
Feel free to keep pointing out the obvious though.
I may have missed something.

It isn't getting anywhere near the old gasket.

To even get it past the big metal lugs takes quite a lot of force and pushes it out of round.
Then to fit it into the actual recess (which is smaller again) really pushes it out of shape.
You have to kind of decide which side to deform it.

sullivj
the 900
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Re: CB500 EXHAUST REMOVAL

Post by sullivj on Tue 24 Jan 2017, 9:25 am

They're too big.

There's a picture on here somewhere of what mine looked like.  I needed a dab of grease to hold them in the hole, otherwise they would have fallen out.

They need to expand when they're crushed.

As I said, they're too big.
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Grarea
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Re: CB500 EXHAUST REMOVAL

Post by Grarea on Tue 24 Jan 2017, 12:24 pm

Brilliant, thanks for that.

Well, Lings have checked and double checked the engine number for me.
(Very kind of him)
Their gaskets come in at 43.1mm.
Spoke with Silvers and theirs are 42.84mm I think he said.

So, 0.3mm won't make any difference. He very kindly had a little hunt and got some from a different model at 40.06mm.
I have ordered them and shall give them a go.

I am a bit confused.
( I am also willing to accept that I might be doing something wrong, but I can't imagine what)
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Vardypeeps
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Re: CB500 EXHAUST REMOVAL

Post by Vardypeeps on Tue 24 Jan 2017, 12:26 pm

Nice work, glad they came off so easy.

I went with an aftermarket can rather than re-painting the original but I'm slowly going for a racer/street fighter/ cafe racer look Smile

sullivj
the 900
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Re: CB500 EXHAUST REMOVAL

Post by sullivj on Tue 24 Jan 2017, 12:46 pm

What's the OD of the headers?  They should be about that size before they're crushed?
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Grarea
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Re: CB500 EXHAUST REMOVAL

Post by Grarea on Tue 24 Jan 2017, 1:21 pm

OK, 
they are 41 or 41.5mm

sullivj
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the 900

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Location : Gatwick

Re: CB500 EXHAUST REMOVAL

Post by sullivj on Tue 24 Jan 2017, 2:04 pm

Hopefully, your 40.6 ones will work then.

I'll see if I have any in stock at home, to see what size they are.

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