Rejet?

06-10-2020, 09:49 AM

Hi there all...new to this forum...thanks for accepting me.
In my 68 years and over 60 different bikes I’ve just bought a 1993 M900 which is my first ever Ducati.
I’ve fitted a pair of Tergimnoni end cans and running standard air box and filter.
Is it necessary to rejet or Dynojet to suit.
Many thanks for any advice

mickj · 06-10-2020, 10:14 AM

Welcome to the forum John.

I've no experience of carbed monsters but other carbed bikes I've had always benefitted from a rejet.

Luddite · 06-10-2020, 11:05 AM

Welcome aboard, John, and congratulations on finally getting yourself a Monster - you've tried the rest, now ride the best!

Way back in the dim and distant, Ducati themselves used to offer a jet kit in their Ducati Performance catalogue. It was made by Dynojet with the part no. 08062 then 96413497B.

It's no longer available from Ducati but the Dynojet branded version can still be found. You'd want a stage 2 kit, Dynojet no. E7206 e.g.

https://www.officine08.com/p13696_ca...t-stage-2.html

https://www.ebay.co.uk/itm/E7206-Car...0/202598732077

Flip · 06-10-2020, 05:11 PM

Yep the 900’s respond well to a Dyno-Jet kit along with a K&N air filter and the open air box mod.

When I did mine many years ago the K&N air filter came with a template to cut the box open.

Top tip- buy yourself a secondhand air box lid to save cutting your original one so the bike can be returned to standard if that’s still possible depending on what other mods may have been done over the years.

Luddite · 06-10-2020, 05:29 PM

Oops! I misread your original post, John. I thought you were already running the open air box, for which the stage 2 kit is designed (E7206).

If you're running Termis but sticking with the OE filter and lid, then a stage 1 kit would probably be more appropriate (E7106) e.g.

https://www.ebay.co.uk/itm/E7106-Car...-/202598732028

Darren69 · 06-10-2020, 06:12 PM

Spotted this earlier, it's the pukka DP filter kit and will save you chopping your own lid.

https://www.ebay.co.uk/itm/Ducati-Mo...97.m4902.l9144

No connection btw.

350TSS · 06-10-2020, 06:57 PM

^^^ that is for an S4 he's got a proper air cooled carburettor M900

Darren69 · 06-10-2020, 07:06 PM

oh yeah, sorry. He can keep it for when he upgrades.

Mark64 · 06-10-2020, 07:25 PM

You should think about earplugs with the open air box, the induction roar is quite loud but in a good way, it complements the termis & dry clutch to give the full orchestral effect.
Happy days

Luddite · 06-10-2020, 07:44 PM

Quote:

Originally Posted by Mark64

...the induction roar is quite loud but in a good way... Happy days

You're so right, Mark. That was one of the things I loved most on my S2R - when you cracked open the throttle, it sounded like sitting astride a V1 (I imagine!).

Zimbo · 06-10-2020, 10:53 PM

My experience of the early carb'd bikes is that it isn't necessary to rejet when running just open cans and using the standard airbox lid and air cleaner element, but if you go to open airbox and free flow air filter then you definitely do!

06-10-2020, 09:49 AM	#1
John Taylor Guest Posts: n/a	Rejet? Hi there all...new to this forum...thanks for accepting me. In my 68 years and over 60 different bikes I’ve just bought a 1993 M900 which is my first ever Ducati. I’ve fitted a pair of Tergimnoni end cans and running standard air box and filter. Is it necessary to rejet or Dynojet to suit. Many thanks for any advice

06-10-2020, 10:14 AM	#2
mickj Registered User Join Date: Jun 2018 Location: Clevedon Bike: M1200s Posts: 565	Welcome to the forum John. I've no experience of carbed monsters but other carbed bikes I've had always benefitted from a rejet. __________________ Keep the rubber side down. Mick

06-10-2020, 05:11 PM	#4
Flip Registered User Join Date: Mar 2010 Location: Beachtown Bike: M900 Posts: 2,188	Yep the 900’s respond well to a Dyno-Jet kit along with a K&N air filter and the open air box mod. When I did mine many years ago the K&N air filter came with a template to cut the box open. Top tip- buy yourself a secondhand air box lid to save cutting your original one so the bike can be returned to standard if that’s still possible depending on what other mods may have been done over the years. __________________ You're perfect, yes, it's true- But without me you're only you!

06-10-2020, 06:12 PM	#6
Darren69 Transmaniacon MOC Join Date: Sep 2013 Location: Sutton In Ashfield Bike: Multiple Monsters Posts: 6,095	Spotted this earlier, it's the pukka DP filter kit and will save you chopping your own lid. https://www.ebay.co.uk/itm/Ducati-Mo...97.m4902.l9144 No connection btw. __________________ Roast Beef Monster! Termignoni and Bucci - Italian for pipe and slippers! S4 Fogarty, S4R 07T, 748, Series 1 Mirage

06-10-2020, 07:06 PM	#8
Darren69 Transmaniacon MOC Join Date: Sep 2013 Location: Sutton In Ashfield Bike: Multiple Monsters Posts: 6,095	oh yeah, sorry. He can keep it for when he upgrades. __________________ Roast Beef Monster! Termignoni and Bucci - Italian for pipe and slippers! S4 Fogarty, S4R 07T, 748, Series 1 Mirage

06-10-2020, 11:05 AM	#3
Luddite Registered User Join Date: Aug 2011 Location: Southampton Bike: M1100evo Posts: 2,465	Welcome aboard, John, and congratulations on finally getting yourself a Monster - you've tried the rest, now ride the best! Way back in the dim and distant, Ducati themselves used to offer a jet kit in their Ducati Performance catalogue. It was made by Dynojet with the part no. 08062 then 96413497B. It's no longer available from Ducati but the Dynojet branded version can still be found. You'd want a stage 2 kit, Dynojet no. E7206 e.g. https://www.officine08.com/p13696_ca...t-stage-2.html https://www.ebay.co.uk/itm/E7206-Car...0/202598732077

06-10-2020, 05:29 PM	#5
Luddite Registered User Join Date: Aug 2011 Location: Southampton Bike: M1100evo Posts: 2,465	Oops! I misread your original post, John. I thought you were already running the open air box, for which the stage 2 kit is designed (E7206). If you're running Termis but sticking with the OE filter and lid, then a stage 1 kit would probably be more appropriate (E7106) e.g. https://www.ebay.co.uk/itm/E7106-Car...-/202598732028

06-10-2020, 06:57 PM	#7
350TSS Too much time on my hands member Join Date: Jan 2013 Location: Shipbourne Bike: M900 Posts: 1,422	^^^ that is for an S4 he's got a proper air cooled carburettor M900

06-10-2020, 07:25 PM	#9
Mark64 Bronze Member Join Date: Nov 2014 Location: Hondon de los Frailes Bike: S4r Posts: 294	You should think about earplugs with the open air box, the induction roar is quite loud but in a good way, it complements the termis & dry clutch to give the full orchestral effect. Happy days

06-10-2020, 10:53 PM	#11
Zimbo Too much time on my hands member Join Date: Apr 2003 Location: Stonehouse, Glos Bike: Multiple Monsters Posts: 2,085	My experience of the early carb'd bikes is that it isn't necessary to rejet when running just open cans and using the standard airbox lid and air cleaner element, but if you go to open airbox and free flow air filter then you definitely do!