Ducati Monster Forum

waste of time for the tuners to make spaghetti pipes for the baby ducs?

no need for larger piping?

 ???

it is the missing link in my sort of uber-620 plans. and that makes me sad.

I was under the impression that new headers on a 630/750/900 wouldn't improve performance... so... no new headers.

Anyone else has a better, more definitive statement?

exactly.  I'm wondering as to the 'why' of it... are the pipes already optimal dia? is there no need for equal length headers?

I am confused.

check here (note, this website is ficle - need to refresh between each doc or it wont load, and best to right-click and save the PDF local rather than try to read online):
http://www.ducati.com/bikes/performance.jhtml?perf=monster

There's a complete Termi low-mount system in the "Engine Upgrading" catalog and a 2-into-1 chrome retro looking system in "Kits"

both seem to be for M900 ~ don't know if they would work with other displacements

The 900 headers won't fit the smaller bikes.

I was told by a guy that knows exhaust that the smaller displacement FI bikes didn't benefit from large diameter headers like the carbed bikes did.

He did say a slightly larger tube and equal length was usually good.

That doesn't explain why nothing is out there though.

yeah, something equal length woud be nice...  :-\ the only other option I can think of is to go custom, but the chopper shops here prolly wouldn't know a damn thing about proper tuning...

prob because the cost for the kit would be the same as for a 900 and the gains are not huge.  thus, when ppl upgrade a 620, they just get a new bike.

or, in the case of 2001cromo and IndustrialGrrl, they put a 900 engine in a 620 frame.

bah! motor swapping is the easy/cost-effective/smart way out!

and I am certainly not the easy/cost-effective/smart kind of boy!!!!

Actually they will if modified.  All 900cc 2V exhausts EXCEPT DS1000/DS1100 (different exhaust port configuration) can be easily modifed by shortening the required amount.  I think the 900 headers need to be shortened in the straight sections of the vertical and horizontal tubes. (typically 5-12mm)  Just cut the section out and reweld shorter.  Exhaust ports in the same location on the head itself.  I've put 900 Termi/Spaghetti systems on 750's and 800's (doublesided swingarms) without problems by shortening as above.

That's the truth

I was referring to a bolt on install Mark.

Not all of us have a tig welder in the shop...

or the skill to weld stainless tubing even if we did.

they used to sell systems for the smaller bikes.  gio.ca.moto used to make some, listed in dp catalogues for a few years.  no one bought them, so they stopped.

you should be able to force a 900 system on, especially ones with lots of joins.  it won't help performance at all over slip ons, it'll cost most likely.  but if it's a visual effect you're after, then that's not so important.

and you might be surprised by how much custom shops know, and how most customers want it done a certain way that's not based on anything much other than looks.

Here is one possible solution..

check out a Paso header.  They have the same dimension as the 600s, which I believe ar the same as the 620.

I don't know how you'll fit mufflers on, you might have to get some custom risers made...

ok, so at this point my bike has:
750 barrels w/FBF 11:1s (stew=awesome!)
BMC/chopped lid
port and polish
PC3
arrow slip-ons

so it would seem that doing a header mod would be... about everythig I can do to it...  ;D  I know a couple of guys who weld, so chopping up a 900 set wouldn't be undoable. still running the motor in, so it hasn't gone on the dyno yet for tuning.

OTOH, something ludicrously silly like a 2-into-2 custom job has crossed my mind as well...

I've been thinking for some time that a lightened fly-wheel might really perk-up my old 620...

ooohhhhh yeeeaaaahhhh.... I forgot about that.



poop, I don't even have a 14t yet. what was I thinking doing all these engine mods first????  :D

I do know that my 620 exhaust fit on my '00 900 motor with no problems whatsoever.