SS939 conversion to SS1200 - Ducati Supersport 939 Forum
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post #1 of 307 (permalink) Old 01-10-2018, 03:47 PM Thread Starter
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SS939 conversion to SS1200

Any constructive advice is welcome.

So guys the project is underway, I have dived in with very little facts on fitment but my investigations seems close to a good fit .

Here's some facts:
a] base gaskets are the same.
b] conrods are the same.
c] head bolt lengths and diameter are the same.
d] top of the air box is the same.
e] bottom of the air box is different due to throttle body size.
f] SS is single spark plug, monster 1200 is twin spark.
g] Cylinder heads and cams are different.
h] stroke length on 2014 monster is same and bore increases from 96mm to 106mm - cylinders are obviously different.
i] Cylinder head covers are the same.

Purchased 2nd hand from multiple suppliers/sellers: For the ethical record, I have seen evidence of bike accident damage, so nothing stolen.
a] Complete twin spark cylinder heads with cams and valves etc are procured off 2014 monster 1200S.
b] twin spark coils and cords procured off 1200 base.
c] 56mm throttle bodies (SS is 53mm) Means the lower airbox needs altering. Off a 2016 monster 1200S.
d] Monster 1200 cylinders and pistons procured.

Outstanding:
a] Gaskets
b] New piston rings
c] investigate if monster lower air box will fit the SS or simply make the holes bigger.
d] EDIT: Procure inlet manifolds
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Last edited by amoslws; 01-10-2018 at 04:00 PM.
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post #2 of 307 (permalink) Old 01-10-2018, 03:50 PM
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How about injectors and fueling?
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post #3 of 307 (permalink) Old 01-10-2018, 03:52 PM
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Wow. This looks like any awesome project. In all honesty, while not quite plug and play, I think that it could be pretty straightforward. Best of luck! Thanks for sharing it here!
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post #4 of 307 (permalink) Old 01-10-2018, 04:06 PM Thread Starter
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Originally Posted by JStrube View Post
How about injectors and fueling?
That's included in the throttle bodies (I hope they fit)
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post #5 of 307 (permalink) Old 01-10-2018, 04:15 PM
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I wish you good luck in your quest. Are you confident that the bottom ends can take the extra strain that they will be exposed to, crank shafts, bearings etc.
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post #6 of 307 (permalink) Old 01-10-2018, 04:23 PM Thread Starter
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I wish you good luck in your quest. Are you confident that the bottom ends can take the extra strain that they will be exposed to, crank shafts, bearings etc.
That's my most worrying point and will only know once done. The big ends are the same but the part numbers are different, it might be the flywheel connection that makes it different, I don't know.
I could have bought a complete engine but we have to jump through hoops of corruption to get such an import cleared, since there are none available in SA. Might require me installing the monster crank later, but time will tell. Good point though.
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post #7 of 307 (permalink) Old 01-10-2018, 05:37 PM
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This will be EPIC and is definitely Sticky worthy in the subsection. Done.
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post #8 of 307 (permalink) Old 01-10-2018, 06:17 PM
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@amoslws - You know you've spoilt Ducati's EICMA 2018 reveal don't you? Ducati are going to be so pissed...

Seriously, very keen to see how this works out.
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post #9 of 307 (permalink) Old 01-10-2018, 06:50 PM Thread Starter
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@amoslws - You know you've spoilt Ducati's EICMA 2018 reveal don't you? Ducati are going to be so pissed...

Seriously, very keen to see how this works out.
Hoping it works matey. I love the comfort and handling of the SS but I have always felt I am wringing its neck to get somewhere... Hope I am doing the right thing. Feeling nervous but also amped.
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post #10 of 307 (permalink) Old 01-10-2018, 11:55 PM
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Fantastic @amoslws !

When do you antipate to begin the build?

2017 Ducati SuperSport S
2015 Ducati Scrambler
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