Just refitted the throttle bodies and noticed that there is a rim gap under the rubbers before the main throttle body. Gap was the same on both bodies, they were firmly in place and I think I can see the gap on some images I found but it still seems odd to me. Her is what I'm talking about, look immediately below the rubber.





Look right to you??

Mate. Are you running the stock air box or an after market Motohgooligan/Rotweiller one? From what can remember off the top of my head if you're running the after market stuff then it should just fit where it fits. Doesn't it just push down a bit lower if you loose off the screws? What exactly is holding it up in that position?

I can go have a look at mine if you want.

But anyway, it should be tightened up in a slightly lower position, I agree.

Not sure if it would effect the running the way it is.

Thanks Bic. If you would take a look at yours that would be great.

With slack clips and my full body weight plus wriggling the bodies would go no lower.

There is a ridge in the rubber that locates in a slot in the castings and I felt that locate so I think its OK but it just looks odd to me hence asking for reassurance.

Set up is with Rotty filter, secondries and shafts removed.

No, that's not right - bottom of rubbers should be sitting down and tight to lip on TB, at least mine do.

Could be just the design gap for the bottom of the OE air box though.

Spray some starter fluid in the area with the engine running to check whether it's a tight seal.

http://www.cwgsy.net/private/rick/MH_Airbox_V1_6.pdf

Well. I took those pictures and created that Motohooligan installation guide back in the day.

Those are the pictures I took of my bike with me fitting his air-filter!

And I think that there is no gap when I plaited the throttle bodies into position. Although, I admit it is hard to see at the resolution the pictures were taken. But it would have worried me if mine had a gap - and like you I would have mentioned it if it was something that was a concern because I wrote that document for people like me who would be not sure about everything and needed reassurance. So I'm pretty sure there wasn't a gap. But my bike was only two or three month old when I did the mod and maybe the rubbers were more flexible.

So…. thinking about it more, and looking at the picture I took all those years ago…it seems to me that your gap could be attributed to the gap which was taken up by the bottom wall section of the big, plastic air box. Isn't this where the air box would sit and then the throttle bodies are attached from the inside of the air box? Maybe the rubber housing on the throttle bodies has kind of worn/deformed so it only wants to push down as far as it was placed when used with the airbox?

If this is so then you shouldn't worry about it at all because this is the position it was fitted in the factory and the fact that the air box wall is physically missing is irrelevant to the lengths and specs of the workings of the throttle bodies and inlet tract.

Those rubbers don't like to go over the lip on the intake manifold. Spray a bit of WD40 in the rubbers before you push them on, I found that helps them into the correct position.

I got the same gap fitting a Rott box on my 990, questioned it during install but it's been running fine and they're on there solid.

That might be right, however when I fitted my rotty intake I left the rubber spacer on the top of the intake:

Comrade Shadowman (J) : Can't really comment on what should be the fit but if you are just putting them back how come the metal is bright? Doesn't that indicate that they are not really where they were?

Just saying.... if you remove something there is normally a gap left....

Mine had the same gap due to the removal of the large base seal grommets.



This is what it was like with the grommets still in situ:

Mines the same and like you it's been to Kev, and it runs fine

It is absolutely fine as long as the clamps are nipped up….. the gap comes from removing the air box base plate and it seals

http://shop.jimaimracing.co.uk/acatalog ... 07-11.html

part number: 60036045000 RUBBER SLEEVE AIRBOX …… fills the gap…….


…...can't believe i'm aiding your attempt to relieve me of the coveted "Best Superduke" award!