Hello and good evening my fellow Ducati enthusiasts! I have had some exhaust leakage problems on my 2005 Monster S4R between the header pipe and mid pipes since I bought the bike used. Its a Termignoni system. So I figured I have to fix this while the bike is in winter storage. Have any of you experienced the same problem before? There are no clamps keeping them together, the header pipe just goes in to the mid pipes. Should I make a small cut on both sides of the mid pipe and put some clamps over it? Or is it possible to make it fit properly with just aligning it better? I want It to fit properly.
A pipe expander is what you need, sometimes the two pipes are a little out of size and can leave a small air gap which leads to poor running and popping on over run. I have a set here where are you?
I can actually see the gap between the header pipe and mid pipe, so a pipe expansion and re-fit with silicone should make it tight. I live in Norway, so I probably don't live anywhere near. But I should be able to borrow one.
Silicone won't really last long as it tends to get blown out by the resulting shockwave that hits it during combustion cycles. The only way to stop it leaking and drawing in air which causes the bike to run lean is to expand the steel so they slot together and create an air tight seal.
I use silicon on mine and leave it for a day before I fire it up.....but because someone previously slightly mangled the outer part of the slip-on end of the header it looked a bit untidy, I also use a good quality stainless pipe clamp to cover it up.........Having really tightened it right up, I found that it did clamp the pipe more than I thought it would...... .....cutting slots in the outer part of the slip-on bit is not easy without damaging the inner part, plus it may make them leak more around the bottom part of the slot when they are clamped up tight. AL
Yes lots of times but not on a bike. My Caterham headers threw the fueling all over the place and silicone would not last at 10500 RPM !!!
That is what I'm worried about. Then again the silicone is a cheap and quick fix. I think it's worth a try. Fitting the exhaust should not take longer than 30 minutes, if it fails I'll get the header pipes expanded and try again.
I had a slight leak at one of the joints on my 916 and used 'gun gum' which sealed it nicely, only downside was that is was a bastid to get the pipes apart when I took them off to clean them.
That's why I use silicone........Hylomar clear.......and there is no worry about it blowing out....you should try cleaning the bl**dy stuff out before re-assembly.... AL
I wouldn't think so.....that appears to be Blue Hylomar... I use this.........Hylosil Instant Gasket Silicone Gasketing Compound - 40g Tube [HM-F/SL303HY/040M] - £2.69 - Wilco Direct - Car Parts and Accessories - Car parts and Car Accessories, for cleaning your car, reparing your vehicle, or adding in car entertainment but any silicone gasket stuff should be OK in the exhaust joint (not at the cylinder head though)... AL
