Ducati Sporting Club UK > Model Specific - Discussion, Technical Problems and Help > 851 / 888 > SP exhaust on Strada

[Douglas851]

Yes, a complete SP system.

The standard 45mm downpipes fitted with Laser race cans made very little difference, apart from the noise.

[Jools]

Hmmmm....not sure why they would make such a difference to the rev limit. I know that freer flowing cans help the breathing, but my 888 strada revs like a rev hungry thing on standard pipes and on the high level cans I have for it.

Are you sure that there was nothing wrong with it beforehand?

[pibbow]

Well I've spent all day fitting an Ex Raymond Roache full 50mm system inc nest of vipers! I'm having trouble with a small blow from round the header inserts any ideas on how to stop them. I've had the whole lot off three times and fettled it but still no joy.

Peter

[Jools]

Originally Posted by pibbow

I'm having trouble with a small blow from round the header inserts any ideas on how to stop them.
Peter

Duct tape? Anyway, some of us spend our lives trying to get a small...no let's not go there!

Seriously, I read somewhere that you could get some heat-proof sealant that stays reasonably elastic - so I'm not talking about that epoxy stuff they wrap round blown exhausts, it's stuff that doesn't bake rock hard or glue your system together forever. Trouble is, I can't think for the life of me what it's called

[Mr.R]

Hi,
I use LOCTITE 5699 Flange Sealant spareingly,it seals my 50mm system on the 851/916sp,the race pipes on my 950 full race bevel and the spannies on my tz's in the past. Leave it to set overnight before fireing it up then you should be ok.It's also easy to take apart,i get mine from BSL.
50mm full systems are to big for a Strada 888/851's, you would need hot cams and larger exhaust valves to take advantage of the big bore header system fully,otherwise your more likely to get less power IMHO.

Steve Robins

[Jools]

Yeah...I agree with Mr R.

I read through the moto-one stuff regularly to fuel my fantasies. If you read the exhaust thread carefully I think that Douglas851 is 5mm out on his sizings. What the moto-one article boils down to is:

888 Standard = 40mm = strangulation
ST4 Standard = 45mm = Good power & torque for not much cash
ST4 DP System = 50mm = No appreciable gain at the top end and a big hole in the torque curve

In summary it seems the 45mm system is the optimum unless you're gonna tune it further

[Jools]

A little blow
Header inserts

and now flange sealant

Does the webteam know about this thread !!!

[Douglas851]

I have just gone out to the garage and measured all the various exhausts I have.
Standard 888, 40mm headers. Standard ST4, 45mm headers. SP2 exhaust on bike 45mm headers and 50mm silencers. So, yes I was 5mm out, but the bike has the right size.
Still very happy with what I have.

[jgriff]

If you have ST4 headers, there will be something radical, that has to happen, or has happened , on the rear header near the middle of the bend, so it clears the swing arm. Hence Moto one ref "modified". I have a set.

Griff

[Stuart. M]

Originally Posted by pibbow

Well I've spent all day fitting an Ex Raymond Roache full 50mm system inc nest of vipers! I'm having trouble with a small blow from round the header inserts any ideas on how to stop them. I've had the whole lot off three times and fettled it but still no joy.

Peter

Hi Peter
Any pics of the system (fitted)? Good to meet up with you the other week, hope the hotel is still keeping you busy to.

Where did you get the open air box cover from - you mentioned it at the time but I've forgotten!


Stuart