2001 748s: size of pipes

**arpiun** · 05 Sep 08, 11:07 PM

Hello all!

Does anyone know what is the diameter size of the original primary pipe and link pipe on a 2001 748s? Are they the same size as the ones installed on an original 748R?
I read so much stuff about those pipes that I'm now lost...

Thank you! This will help me choosing the right pipe size for Carbon Termignoni exhaust cans I'm planning to buy soon.

PS: This is my first post on this forum so please be indulgent :-)

**petevtwin650** · 05 Sep 08, 11:19 PM

Welcome to the site arpiun.

Have a look at your link pipe.

If it's the same as mine, circled in the pic, you need 45mm pipes.

HTH.

**DukeDesmo** · 05 Sep 08, 11:19 PM

45mm, only the SPS/R bikes would have larger (50mm).

**arpiun** · 05 Sep 08, 11:35 PM

Thank you guys for your fast replies!

Indeed I have the same circle as the one you have on your 996: My 748s.

So I guess I can forget those nice pipes that are currently avail. on ebay:
TERMIGNONI EXHAUST END CANS DUCATI 748/916 CHIP 50mm
TERMIGNONI Carbon DUCATI 748 916 996 998 Diam.50 NEW
:-(

Actually, isn't quite difficult to find carbon 45mm Termis nowadays?

**petevtwin650** · 06 Sep 08, 06:29 AM

Quote:

Originally Posted by arpiun

Thank you guys for your fast replies!

Indeed I have the same circle as the one you have on your 996: My 748s.

So I guess I can forget those nice pipes that are currently avail. on ebay:
TERMIGNONI EXHAUST END CANS DUCATI 748/916 CHIP 50mm
TERMIGNONI Carbon DUCATI 748 916 996 998 Diam.50 NEW
:-(

Actually, isn't quite difficult to find carbon 45mm Termis nowadays?

Depends how much you want to spend and how lucky you are.

Since that pic was taken, 3 weeks ago, I've bought a full 50mm system and a half 50 mm off of ebay. The half system ,admittedly with Stainless cans was only £210. You can buy 45/50 mm link pipes as well but they seem to go for around £160. Also our old 45mms, as in the first pic, might be up for sale.

Or these: Termignoni carbon fibre end cans- Ducati 748/916etc on eBay, also Exhausts, Performance Tuning, Accessories, Motorcycle Parts Accessories, Cars, Parts Vehicles (end time 12-Sep-08 17:50:26 BST)

Our new JHP half system

Fitted:

**Desmo Dave** · 06 Sep 08, 10:46 AM

Quote:

Originally Posted by DukeDesmo

45mm, only the SPS/R bikes would have larger (50mm).

No, the 748R has 45mm system as standard, I presume it was the same for the SP/SPS.

I think some of the last R's came with a boxed half 45/50 system and chip.

**DukeDesmo** · 06 Sep 08, 12:21 PM

Quote:

Originally Posted by Desmo Dave

No, the 748R has 45mm system as standard, I presume it was the same for the SP/SPS.

I think some of the last R's came with a boxed half 45/50 system and chip.

I stand corrected, probably only the 916/996 SP/SPS/R that had a full 50mm system.

I think a 50mm is too big for a 748 anyway, unless it's been seriously tuned - otherwise it'll probably make less power.......

**Michael D** · 06 Sep 08, 12:54 PM

My opinion....unless your going for any engine tuning,stick with 45mm.Open silencers,Termignoni etc will give you "the sound".As has been said a full 50mm system on a 748 will lose the bottom end/midrange,tried it on a 748r and went back to 45/50.A 45mm system with 50mm silencers is probably the best option but with the price of link pipes etc...is it worth the small gains?
Has been said,not tried it myself...50mm silencers will fit over rather than inside a 45mm link pipe.Or a decent exhuast maker will modify link pipes for a lot less than they sell for on ebay etc.Ive found JP Exhausts in Macclesfield to be excellent.
Stainless Steel Exhausts, Manifolds, Car Exhausts Systems - JP Exhausts Ltd, Cheshire, UK

**higgy748** · 06 Sep 08, 07:55 PM

My 748sps came with 45/50mm both the street and carbon pipes and chips to suit both sets. I needed a new set of link pipes and at the time bought a set of 50/50 off e bay. The 45mm pipes would fit nicely inside the 50mm ends but when fitted up on the bike they didn't line up so I ended up having to wait for a45/50mm set If you ask Ducati for a set you get quoted £700! The 50mm set only cost me £100 I' waiting to se if a set of 50mm front pipes come up

**Desmo Dave** · 07 Sep 08, 05:22 PM

Quote:

Originally Posted by Michael D

My opinion....unless your going for any engine tuning,stick with 45mm.Open silencers,Termignoni etc will give you "the sound".As has been said a full 50mm system on a 748 will lose the bottom end/midrange,tried it on a 748r and went back to 45/50.A 45mm system with 50mm silencers is probably the best option but with the price of link pipes etc...is it worth the small gains?
UK[/url]

I'm running a 748R on a full 50mm Termi system, which I perviously had on a 748E. I definitely prefer it to the standard 45mm with termi cans, but I haven't tried a half system. Is it also the case that throttle response is better with the 45/50 half system?

Is a full system an advantage on a race track, when you'd be spending most of the time in the top range, or do you think a half system still works better?

Also I have a 50/54 half system that I was thinking of converting for the R, is this worth doing or would I be wasting my time? I heard somewhere that 54mm doesn't give any performance gain over a 50mm anyway, but is quieter, which i don't get at all.

It's all rather confusing...

**arpiun** · 07 Sep 08, 07:02 PM

Thank you all of you for your interesting replies and for your experience.

Now I understand that a full 50mm exhaust system or even a 54mm is only dedicated to race use when the engine is running at very high RPM's.

This is not what I usually do with my bike.

A good compromise will be a half 45mm system (from engine to the link pipe), then a 45/50mm link pipe and finally a 50mm cans.

What do you think of those pipes for me? They're coming from a 748R:
eBay.be: Original Ducati 748 R Termignoni Anlage RACE 996 50mm (objet 160279340084 Fin: 13-Sep-08 23:08:12 CEST)

**Michael D** · 07 Sep 08, 07:23 PM

Quote:

Originally Posted by Desmo Dave

I'm running a 748R on a full 50mm Termi system, which I perviously had on a 748E. I definitely prefer it to the standard 45mm with termi cans, but I haven't tried a half system. Is it also the case that throttle response is better with the 45/50 half system?

Is a full system an advantage on a race track, when you'd be spending most of the time in the top range, or do you think a half system still works better?

Also I have a 50/54 half system that I was thinking of converting for the R, is this worth doing or would I be wasting my time? I heard somewhere that 54mm doesn't give any performance gain over a 50mm anyway, but is quieter, which i don't get at all.

It's all rather confusing...

Exhaust header pipe diameter does start to get very technical,apparently the optimum header pipe area should be 1.16 times the exhaust valve open area.Word is that the 45/50mm system works best on a 748 in most situations.A 54mm system would need larger exhaust valves and higher lift cams to work properly.
Race exhausts grew in diameter and thin wall pipe to keep within the noise regulations,the 748 RS used a 54mm "tapered muffler" system to comply with the noise regs.To achieve the same noise levels with a 50mm system would have cost 2-3hp,but with better low/midrange.
Its really all about a couple of horse power here and there,vital in the race world....not so for road use.And of course the bling factor!.

**Michael D** · 07 Sep 08, 07:42 PM

Quote:

Originally Posted by arpiun

Thank you all of you for your interesting replies and for your experience.

Now I understand that a full 50mm exhaust system or even a 54mm is only dedicated to race use when the engine is running at very high RPM's.

This is not what I usually do with my bike.

A good compromise will be a half 45mm system (from engine to the link pipe), then a 45/50mm link pipe and finally a 50mm cans.

What do you think of those pipes for me? They're coming from a 748R:
eBay.be: Original Ducati 748 R Termignoni Anlage RACE 996 50mm (objet 160279340084 Fin: 13-Sep-08 23:08:12 CEST)

Thats generally considered the way to go.Really needs fuelling setting up to get value from the cost of the pipes....Ultimap would be my favourite.

**arpiun** · 09 Sep 08, 03:03 PM

And what do you think about Akrapovic 45mm carbon cans ?
Are they better than Termignoni or not? An eBay vendor is telling me that the Akrapovic are just crap compared to Termis but I can't believe that!

What's your opinion?

**petevtwin650** · 09 Sep 08, 03:07 PM

Quote:

Originally Posted by arpiun

And what do you think about Akrapovic 45mm carbon cans ?
Are they better than Termignoni or not? An eBay vendor is telling me that the Akrapovic are just crap compared to Termis but I can't believe that!

What's your opinion?

We've just bought JHP cans for our bike. All the top makes should be ok, but I guess all will sound a little different. Arrow are another popular choice over here. So most of it is down to personal preferences and possibly what's available at the time

There is a 45/50 link pipe on Uk ebay at the mo.