renegade mille mid section mod - further thoughts

[cornish mafia]

Ok no worries thanks for replies ..............anyone know where i can get the exhaust gaskets from ? I've been looking and AF1 seems to be the only place so far ... Don't want to order just yet if there's somewhere in the UK ...

[Aladinsaneuk]

griff at aprilia performance?

[D-Rider]

Think I got mine from inmoto or speedaway - think most of the dealers would stock them

[GregD-UK]

Hi all,

OK, the add-on pipe configuration for the mille setup, what diameter pipe should be used? My exhaust guy, wants to know why the need for extra pipe as it goes into one anyways

I told him my limited information, was to balance the pipes more, and to give more low-med power on the delivery. Correct me please. Working on a "shot-gun" setup

[D-Rider]

One of the threads I had bookmarked mentioned the tube sizes - that was before I had a bit of bother with the PC and lost all my Firefox bookmarks ....

search enough and the thread will turn up again - I think it was from AF1

I think the theory is that the balance pipe improves the scavenge.
The added pipe at the front has the biggest effect and primarily improves mid-range. The shorter rear link is more of a top end tweak.

[Kwackerz]

My exhaust guy, wants to know why the need for extra pipe as it goes into one anyways

Because.

[Kwackerz]

http://www.apriliaforum.com/forums/show ... ?p=2494067

http://www.apriliaforum.com/forums/show ... 552&page=3

That the thread D-R?

[D-Rider]

http://www.apriliaforum.com/forums/show ... ?p=2494067

http://www.apriliaforum.com/forums/show ... 552&page=3

That the thread D-R?

That was certainly one of them.

I also had a useful email from Pete when we were both investigating and discussing this:

few things i have found in the thread of note:

"Spoke to Mark Hill at MHP yesterday about the modified manifold I bought from him on ebay and asked him for some backround info on the subject. He has lots of info on tuning these bikes and about this mod.

He told me that the longer crossover pipe was to help with the returning exhaust pulses/waves and that it helped with the midrange dip around 5000rpm and made the bike pull more harder in the low/mid rev range. He explained that the rear header on these bikes is far to short and that the smaller crossover pipe into the collector helped to equalize it (rear header)with the front header and improve the flow of the whole exhaust system. I asked him would spending £1400 on an Akra 2-2 against this mod be more beneficial and he replyed "No Way". Himself and a few others worked on this mod from the beginning and he said that they where amazed at the performance gains it gave compared to standard and also how much it matched a full race system. It was made to offer a cheaper alternative to the guys who where racing Mille's at the time against buying a full Akra system. The only thing to note is that they where using a 70mm link pipe and 70mm end can which was being supplied through Aprilia at the time. He said this gave the system it's best performance. I told him I expected to use a 60mm link pipe and can and he replied that you would lose a few HP off the top end but that it would be a good compromise.

The two bent bits each end of the long crossover pipe are 70mm each and the straight middle section is 55mm.
195mm for the total length.

Diameter is 35mm.

That's the bit I'm talking about. The full length of that crossover (elbow to elbow) is 195mm and 35mm diameter. Straight piece on it's own is 55mm long."

[Kwackerz]

Interesting breakdown on the effects of the mod.
70mm Cans are bloody huge!

*makes a few notes*



Why can I not get hold of bloody Jorge when I have a list of questions I need answered..

[D-Rider]

Why can I not get hold of bloody Jorge when I have a list of questions I need answered..

..... and if you ever do, please find out what his various chip designations mean .... +10, +2, -2 or whatever.

This has been discussed several times on the forums and although several plausible theories have been postulated, we don't have a definitive answer.

[cornish mafia]

Yahooooooo heading home from work at last to try and join in the great " get the exhaust mod fitted " GANG but just had email of redrat and he couldn't get his welder to do it for me over the weekend .................he can't find him .....GUTTED !! Not to worry he's on the case so hopefully should be able to get going soon enough ...

PLUS i couldn't resist writing in so it made me the 100th reply on this subject , a first for me ........

[Aladinsaneuk]

lol - grats


I rate this mod - more i ride the bike, i rate it.

I am due up in tamworth tomorrow and I may suggest that the dungareee terror slings his legs over the bike and has a quick blast to see his thoughts... thats crap english but i think you know what I mean!

[Kwackerz]

Why can I not get hold of bloody Jorge when I have a list of questions I need answered..

..... and if you ever do, please find out what his various chip designations mean .... +10, +2, -2 or whatever.

This has been discussed several times on the forums and although several plausible theories have been postulated, we don't have a definitive answer.

I need Alan for that.. another guy who is proving elusive.

[cornish mafia]

btw, I will be posting some photos later of my exhaust system so that you will be able to see how i have fitted the mille headers, oil tank etc

it will be in a separate thread in the tech section

Was just wondering if you'd done that Aladin ? , was thinking of starting project " strip bike down for the Useless twat to try and MOD exhaust mode " and wanted to see where the CUT is for the belly pan and any other tips ......

Exhaust should be with me by the end of next week hopefully ..........Bloody hope so...

[Aladinsaneuk]

You mean https://www.ridersite.com/viewtopic.php?t=8132