Cam Chain

[Kernel]

I know this has been covered before, but I am after a little more detail then I have found.
I have read about 2 different methods of changing the cam chain, the spliting of the block or attacking the casing with a dremel.
When I have read about the spliting method, I have heard people say 'spliting the lump from the block', and to be honest that confuses the hell out of me. Can someone elaborate on this for me.
Also with the dremeling method, which is the exact bit I trim down, and how much do I have to take off? Does anyone have any pictures of the bit?
Yup I ask lots of questions

[RedexRobB]

Im guessing once you have it apart youll see the bit they are on about. And how to take it off? Well i guess you keep going till the chain comes out?

[tomzxr400]

to be honest i take the engine out it takes about an hour to get out but makes it easy to do the timming
all you do is remove pick up coil cover and set to tdc
take the chain tensioner out undo the cam holders and take the cams off (they are marked to which is which) then its a case of removing the guides and chain then putting it back togerther timming marks are easy to set and tentioner is easy (as long as it works)
prob a good idea to change it if you dont know when it was last done cause they are shite and i would also check the valve clearences while your at it
if you need any more help let me know

[gubbs]

Be suprised how well they can last ..

Best to buy a £8 LCD micrometer from Maplins (you need this tool to do valve clearences anyway) and measure x# of links for the service limit as per the workshop pdf.

Mine was well inside spc .. despite being at least 20k old.

Which was annoying, because I had already bought a £25 replacement. Grr.