Carbon fibre rocker covers

[chinachile]

Good morning,

I won some rather natty CF cylinder head covers off ebay thinking that they must be pretty straight forward to fit to my single spark 2002S

I am probably being extremely thick but can't work out how they are supposed to attach to the cylinder heads. There are two holes but they don't line up for anything.

Do I need some brackets or do the rocker covers need to be bored and tapped?

Hope there is someone out there who can help and a million thanks in advance

[gus]

Hi
You sure they aint for a twin spark cover?
If they are,then you can either glue/silicone them on or use some sort of adhesive tape.
gus

[theseadog]

Hello CC

If the covers have the holes for attaching them to the existing rocker cover at the front and back bang in the middle then you're going to need the non-magnesium threaded rocker covers to mount them properly. The standard rocker covers on the S are Hot-poop magnesium, but wafer thin, so forget trying to tap them. A set of threaded covers will cost approx £140 from Motorworks.

Alternatively as Gus suggested you could form some sort of bracket, or use some form of adhesive, but personally I wouldn't chance that, especially if you're a spirited rider. Lets face it if the guys in the BoxerCup could make them fall of when they're properly mounted how well do you thin a bodge would work ??? The other thing to consider is if you glue them in place, which probably would be a strong enough bond, then how the heck do you get the rocker cover off to set valve clearances ???

Probably haven't really helped you here, sorry.

Toodle Pip

[a-jay26]

Sounds like you need a set of rocker covers suitable for a 2003 boxer cup... ie the same as my one. I had to get a set after a small spill and I think they were about £50 - £60 each from BMW.

cheers

[winger]

The important thing is to trace what make they are to my knowledge there are at least 3 04 different makes.

But if you do glue e'm,use silicone.

Chris

[sandbar]

I won some rather natty CF cylinder head covers off ebay thinking that they must be pretty straight forward to fit to my single spark 2002S

Ah ebay again - its a cracker!

On the assumption that what you have acquired is a set of rocker cover covers, maybe I can give you a bit of assistance.

We (Ilmberger) do a set of rocker cover covers. They would have the two holes that you mention. They will fit onto any single spark but will need the fitting kit that comes with them when they are new. If you have got a set of those, then I cannot think of any way that you would fit them without the bracket (carbon fibre - natch!).

If you have got a set of the BMW BCR covers (which will also have the two holes in them) then you will need a different set of alloy (aluminium?) rocker covers to fit them to. The ones with the threads already there are exclusive to the single spark BCR.

......then you're going to need the non-magnesium threaded rocker covers to mount them properly. The standard rocker covers on the S are Hot-poop magnesium, but wafer thin, so forget trying to tap them.

If you are thinking of trying to drill and tap normal rocker covers be careful. I don't think they are all the same and I don't think the BCR ones are just normal ones with a tapped hole. The tapped hole appears to be into a sort of boss that is cast into the cover giving a much deeper spot for the blind hole to be. I have seen plenty of rocker covers that do not have these bosses.

If you have got either of those types, then I don't think that glueing is a solution. Apart from problems doing the valve clearances, it might make any spark plug work a touch difficult.

Good luck with this project.

Sandbar

[winger]

All of the rocker covers used in 99/2000 boxercup series were either lock wired on or stuck on,as said there are several,Sereme did one,you can get a similar one from Metisse in Germany,Ilmberger have one,is it the same as the one at www.carbon.de cuz thats been around almost as long as the ones that i've got,and i know were there are boat loads of e'm!!!

Come on Mr Ilmberger as your never backwards in comeing forwards how about the real carbon covers!!!!

Chris

[sandbar]

Come on Mr Ilmberger as your never backwards in comeing forwards how about the real carbon covers!!!!

True - how very true!!!

But you have got me seriously confused over this. The link from carbon.de that you gave showed the Ilmberger rocker cover covers - although they claim that it is suitable for the twin spark and that certainly is not true of the ones that we (Ilmberger) sell.

I know nothing (no change there - then!) about the early BoxerCup race bikes, or about the other makes that you mention.

But - when BMW got close to selling the BCR, they put the 'same' ones on to the race bikes, for marketing purposes. In fact they weren't the same and they didn't fit the same, mainly because they were definitely going to ground them and they wanted (needed) more ground clearance than the road ones allowed. They would have used the same shape bellypan for the road bikes, but it did not give enough ground clearance.

Those comments probably apply to the later twin spark bikes, but as we do not do anything for the twin spark I never had any interest in them.
Incidentally, the reason for that was that Ilmberger knew that the twin spark was a dead end with a very limited production life. They already knew about the 'penta-heads'.

Real carbon covers - yep - we do those - as seen on the Sandbar Show bike - and as sold on a small 'group buy' recently. One set left if you want to PM me.

Sandbar