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Messages - Veedunk
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« on: September 22, 2021, 03:24:50 PM »
I’ve just noticed the photos above have rotated by themselves but you get the idea.
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« on: September 22, 2021, 03:18:17 PM »
My new parts from David Silver just arrived this morning so I’ve taken a couple of photos…
The chain on the left is the one still in the bike, the chain on the right is the new one.
The sprocket on the left is the old one, new one on the right.
Some obvious differences…not sure if this will be the cause of the problem but somethings not right!
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« on: September 08, 2021, 08:57:51 PM »
I’ve tried a few suppliers today but not had any luck finding a camshaft either new or secondhand. They are obviously quite a rare item.
It looks like I will get it re-built unless anyone has a spare camshaft lying around in the shed??
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« on: September 07, 2021, 04:32:34 PM »
Thanks again for everyone’s input here, it really is much appreciated but a little overwhelming at the same time!
I’ve put the chain on the sprocket, I would say there is about 1.5mm give or take of movement side to side…it doesn’t feel like a tight fit and quite loose on the sprocket teeth. Also, I’ve checked the David Silver website and they list a cam chain which looks different to mine, more like the one in the link posted by K2-K6, so I’m pretty sure it’s got the wrong chain fitted.
Very occasionally and only when starting from cold would I get any rattling from the engine, more like a single slap and then the noise would stop straight away and I never gave it any more thought as the engine ran fine.
As for the cam being worn, is there any way to check? It does feel slightly uneven over the lobe with a slight ridge on one side.
Cheers
5
« on: September 07, 2021, 03:31:34 PM »
Ok I’ve had a look at the oil strainer and there’s a small amount of metal deposits but certainly not much.
I tend to agree that the casting shape on my bike is different to the link, I will add a photo to try and show it more clearly and the wear/damage to that area. And yes my chain is narrower to the one in the link so there’s definitely something wrong here….
As for the pistons, they are all the same size and have all the rings so probably just a trick of the light there!
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« on: September 07, 2021, 12:44:55 PM »
As you can probably guess this is all new to me, really appreciate people taking time to help me out.
I’ve taken some photos of the chain as requested.
Many thanks
7
« on: September 07, 2021, 11:54:51 AM »
Ok I’ve dropped the sump, removed the oil filter and removed the oil pump…
There are very, very fine metal particles in the oil filter and the oil from it, same with the oil pump, if I didn’t know better I probably wouldn’t have noticed them. However when I drained the oil from the sump there were some bigger particles which I’ve tried to show an example with the photo, but certainly not much considering the amount of wear.
I don’t know what to look for on the primary chain if I’m honest, it looks normal to me.
As for what was rebuilt by the last owner, I don’t really know, but I will try and find out.
The bike has always run well but not been as quick as I would have expected but I don’t have anything to compare it with as I’ve always had modern bikes. Would this sort of wear prevent the bike from revving fully as its always sounded like it’s screaming at about 6000rpm?
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« on: September 07, 2021, 07:25:48 AM »
Thanks for all the replies, not the answer I was hoping for though!
Before I go ahead and strip it down, do you think these could be old wear marks? I’m only asking because I bought this bike a year ago after a full rebuild during lockdown by the previous owner, it’s probably done less than 1000 miles since then.
I will drain the oil today and see what sort of condition it is in.
Thanks again
9
« on: September 06, 2021, 10:05:36 AM »
Hi, I’ve taken my cylinder head off due to trying to find an oil leak…I’m about to replace the gaskets/seals and hope that fixes the problem but before it all goes back I wanted some advice about these chain marks? Is that normal wear to the inside of the head and the barrel casing?
Many thanks
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« on: May 26, 2021, 08:28:11 PM »
Thanks for the warm welcome everyone. Here’s a couple of photos I took earlier.
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« on: May 25, 2021, 03:48:21 PM »
Hi all, just saying hello. I’ve been lurking for about six months or so when i purchased a CB650Z. It had already been restored by the previous owner as a lockdown project and since then i have made a few changes myself, such as changing to spoke rims, changing the rear end/mudguards/seat and indicators to make it more of a cafe/tracker style.
Im in the process of waiting for DVLA to change it to Historic as it was built in 1978 but only registered in 1981.
Look forward to more great information from this site.
Cheers
Duncan
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