Can you just take out the old cct and put the new one in?

[WULFSTAN]

Like the title says really bike is a cbr 600 f l 1990 thanks
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Your backside is better enough for you to run again, if need be – bristle up the courage of the cornered rat, put on a bold front, and to hell with them. Bluff my boy – bluff, shift and lie for the sake of your neck and the honour of Old England

[spikenipple]

No, because if the cam chain skips a tooth in the process you'll end up with one very fucked engine.
Set the engine to TDC on cylinder 1, gently remove the current CCT, fit the new one making sure everything's clean and no shite has got into the hole, tension it up and then turn the engine over several turns by hand (socket on the end of the crank). If that's ok then fire her up once you're sure everything's back together properly.
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C50 > GN250 > XJ600 > SV650S K7 > 2001 RSV Mille R > MT-09, XR400R > 2005 Fireblade (trackbike) + 2022 MT-09 + ZXR400 race bike

[MaybeGuy]

Ignore the above. On a 4cyl bike it's fine to take it out and replace it.
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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

[spikenipple]

Really?
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C50 > GN250 > XJ600 > SV650S K7 > 2001 RSV Mille R > MT-09, XR400R > 2005 Fireblade (trackbike) + 2022 MT-09 + ZXR400 race bike

[stonesie]

I would still do it at TDC1 just to be sure that all the slack was on the tensioner side of the chain.

[MaybeGuy]

[spikenipple]

The reason I suggested putting it to TDC is that in the (admittedly unlikely) event of the chain slipping, you know where the engine is and where the cams should be.
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C50 > GN250 > XJ600 > SV650S K7 > 2001 RSV Mille R > MT-09, XR400R > 2005 Fireblade (trackbike) + 2022 MT-09 + ZXR400 race bike

[The Artist]

I am not familiar with cbr tensioners but surely you could just loosen off the spring inside, then remove it, that will keep it tensioned until it is right out and just pop the new one in.

[WULFSTAN]

[Frost]

So long as you fit the new one in the correct order it'll be fine.
Reset it, put the first part in and bolt it on properly, then put the spring in.