900/750 ss/monster inlet manifolds

discussion about the 750 Sport and '89/'90 900SS, which share many mechanicals with the Paso series
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customhead
Posts: 49
Joined: Fri Mar 05, 2010 2:35 pm
model: 750 Sport
year: 1988
Location: Eudlo, Queensland

900/750 ss/monster inlet manifolds

Post by customhead »

Does anybody know if there are any differences between the 900/750 ss/monster inlet manifolds?

I am fitting some Mikuni carbs from a 750SS to a custom Sport build and am wondering whether it matters.

thanks, Sean

PS anybody have a set they want to sell before I go shopping for them?
Mc tool
paso grand pooh-bah
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model: 906 Paso
year: 1990
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Re: 900/750 ss/monster inlet manifolds

Post by Mc tool »

Im pretty sure I read somewhere they are different , the 750 engine has a shorter stroke and thus a lower cylinder head height , so it makes sense that they would be different :)
I wish I was young again............Id be heaps smarter than last time
customhead
Posts: 49
Joined: Fri Mar 05, 2010 2:35 pm
model: 750 Sport
year: 1988
Location: Eudlo, Queensland

Re: 900/750 ss/monster inlet manifolds

Post by customhead »

I thought so too but does that mean 900ss units are shorter?
Mc tool
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Re: 900/750 ss/monster inlet manifolds

Post by Mc tool »

longer , I have a pair off a 900ss , I can dig em out and have a measure up / pic if you want :)
I wish I was young again............Id be heaps smarter than last time
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Fraser
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model: 750 Paso
year: 1986
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Re: 900/750 ss/monster inlet manifolds

Post by Fraser »

Customhead,

I have the 900 SS inlet manifolds on my 750P and they fit fine with the Mikunis (also off a 900 SS).

Cheers,

Fraser.
750 Paso
1980 Moto Morini 500 Sport
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paso750
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Re: 900/750 ss/monster inlet manifolds

Post by paso750 »

if you put a 750 and a 900 Mikuni inlet manifold next to each other you will hardly spot a difference but there are several. The 900 inlet manifolds have a different length and angle to compensate the cylinder height and to position the carb in the exact same height as on the 750.
You can fit 900 manifolds on a 750 and probably vice versa but the carb will stand slightly askew and due to that mismatch the carb and rubber boots may not sit perfectly so there`s a risk of leak air. Better get a set from a same cc bike.

SS and Monster inlet manifolds are not identical. The Monster use a vacuum fuel pump and fuel valve so the inlet manifolds have threads for hose nipples. Some SS inlet manifolds have a screw blocking these holes others don`t have them at all.
Mc tool
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Re: 900/750 ss/monster inlet manifolds

Post by Mc tool »

Nah nah na nah nah :lol: :lol:
I wish I was young again............Id be heaps smarter than last time
Nunodeo
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Joined: Tue Jan 21, 2014 2:28 am
model: 750 Sport
year: 1990
Location: South S.F. Bay USA

Re: 900/750 ss/monster inlet manifolds

Post by Nunodeo »

Sean, go all out and custom make one like this, so your carb. can sit straight. :cool:
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lane1feathers
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Joined: Thu Sep 20, 2012 11:48 am
model: 906 Paso
year: 1989
Location: Perth, West. Australia

Re: 900/750 ss/monster inlet manifolds

Post by lane1feathers »

Nunodeo wrote:Sean, go all out and custom make one like this, so your carb. can sit straight. :cool:
The Mikuni carbs come as a pair...joined at the hip...as it were, unlike the single delortos :thumbup:
Lane
89 Dark Blue 906 Paso
Ducati Paso, It's an 'understanding'....
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paso750
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Re: 900/750 ss/monster inlet manifolds

Post by paso750 »

or Mikuni TMs
lumbux
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Joined: Fri Jan 24, 2014 7:07 pm
model: 750 SS
year: 1991
Location: UK

Re: 900/750 ss/monster inlet manifolds

Post by lumbux »

The inlet manifolds from the SS are all marked and if you fit the wrong ones you can end up restricting the bike. The ones for a 900 should be stamped with a 9, 750 a 7, 600 a 6 and 400 a 4. They are all the same length but the bore will differ.
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paso750
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Re: 900/750 ss/monster inlet manifolds

Post by paso750 »

only the later ones were marked and the bore of the 750 & 900 ones is the same.
Nunodeo
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Re: 900/750 ss/monster inlet manifolds

Post by Nunodeo »

I'm fairly new to the 750, so I can't comment on the stamping. All I know is that I took an intake from a early 2000 750, cut it up in 3 pieces, got it re-welded, put it on, and the bike is finally running well. :thumbup:
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paso750
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Re: 900/750 ss/monster inlet manifolds

Post by paso750 »

from a 2000 ? Then yours would be from a bike with fuel injection. :huh:
Nunodeo
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Re: 900/750 ss/monster inlet manifolds

Post by Nunodeo »

Sorry guys, the intake I cut up for my 750S was from an early 90's 900, not an early 2000 750. :banghead:
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