SOHC.co.uk Forums > CB650

Is this normal chain wear?

<< < (4/7) > >>

Veedunk:
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

Skoti:
Looks like it has either the wrong cam chain fitted (too wide) or the camshaft sprocket is wrong (too narrow).

BTW the camshaft also looks fairly worn to me.


Do we have a CB650 expert on this forum?

Sesman:
I’d definitely split that motor in order to clear all debris from oil ways/galleries.

K2-K6:
"Do we have a CB650 expert on this forum?"

Ok, to the OP, the 650 is very closely related (development of 550) with not much change, but obviously some significant ones that familiarity of the forum may not initially cover. It may take some time to build you a picture fully to understand what you've got there.

https://www.facebook.com/102952896441309/posts/the-cb650-engine-disassembled-i-just-cant-help-but-feeling-joy-seeing-this-much-/2453570004712908/ looking at the photos in link, it does seem as Bryan believes that it's a Hyvo type camchain (the only one of these engines equipped with? ) but, and it's a big BUT, the chain link form in that link is definitely different with no apparent centre line that would interact with the sprocket in a different way, like control of centering from tooth form.
Additionally, the cases in that link appear to show a top face (site of wear on yours) of a different and square form to accommodate a wider chain as original.

Wondering whether this example here has had 650 components built into a 550 pair of crankcase (without clearance for Hyvo, wider chain) and given this odd interface.

Veedunk:
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!

Navigation

[0] Message Index

[#] Next page

[*] Previous page