860GTS into Darmah

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Lumpy
SD900 Darmah
Posts: 310
Joined: Sun Mar 25, 2007 4:49 am

860GTS into Darmah

Post by Lumpy » Mon Mar 19, 2018 3:20 am

Does anybody know if a 1976 860GTS engine will slot into an SD900 Darmah frame? While I`m picking brains is the frame geometry, as in rake, trail and wheelbase similar?

wdietz186
888
Posts: 677
Joined: Sun Sep 10, 2006 4:40 pm

Re: 860GTS into Darmah

Post by wdietz186 » Mon Mar 19, 2018 6:10 am

The motor mount holes are in the same places. The only problem I can think of might be the motor mount plate at the left rear may not be relieved for the shift cross shaft lump on the back of the 76 engine cases. I'm going by memory here so I might be wrong. If the 76 has Bosch ignition it all should fall right in but the older Ducati Electrotecnica setup [if it still works] will need the ign. boxes etc. from the GTS. I'm pretty sure the geometry is the same between the two, long and stable. Crank took a dump, right?

Lumpy
SD900 Darmah
Posts: 310
Joined: Sun Mar 25, 2007 4:49 am

Re: 860GTS into Darmah

Post by Lumpy » Mon Mar 19, 2018 1:49 pm

Thanks for the reply. No, crank is all still where it should be. Im looking at building a bit of a special. Basically along the lines of a 750 Sport but with no side covers and battery mounted under the duck tail. Bit of a minimalist look is what Im after. I`ve been offered a Darmah frame cheap and am wondering if I might be better chopping bits off that and adding rear set mounts rather than cutting and welding her original frame. It has an electronica ignition with that wonderful surge at 2500RPM but I have a replacement Sachse ignition for her.

Kilmer
Cucciolo - the Lil Pup
Posts: 15
Joined: Wed Aug 17, 2005 11:53 am
Location: Denmark

Re: 860GTS into Darmah

Post by Kilmer » Sat Jul 28, 2018 8:59 pm

I have both a 900GTS and a Darmah in my garage, and fail to see any difference between the engine mounting holes on the two models. If you want me to check any specific measurements, just let me know.

/Martin
Ducati 916
Ducati 900 SL
Ducati 750 Sport '88
Ducati 900 SS replica
Ducati 900 SS Darmah
Ducati 900 GTS
Laverda SF2
Nordon Dominator 99
Yamaha WR 200

ducadini
750 Sport [BEVEL]
Posts: 225
Joined: Sat Jul 31, 2004 8:54 am
Location: Antwerpen

Re: 860GTS into Darmah

Post by ducadini » Sun Jul 29, 2018 12:19 pm

The engine mounting holes are identical on all bevels. The difference is in the gearchange.
The roundcase had the box on the right outside, shifting rightside.
860 had the square box on the right and a shaft from the left side to the rightside box, running outside the crankcase.
The Darmah had the shifting mechanism inside the case but at about the same place.
So IRCC, fitting a 860 engine in a Darmah would be possible with mods to the starter and ignition, but fitting a 860 or Darmah (squarecase) in a roundcase frame would need some cutting of the plate (not much and without nearly any loss of strength.
and we don't want to go cutting and modding roundcase frames, do we ? except for racing :-D :-D

ciao
ducadini
Nego i ricordi peggiori
Richiamo i migliori pensieri

Lumpy
SD900 Darmah
Posts: 310
Joined: Sun Mar 25, 2007 4:49 am

Re: 860GTS into Darmah

Post by Lumpy » Sun Jul 29, 2018 3:01 pm

Thank you Kilmer for your kind offer and Ducadini for your advise. Sadly the monster I call employment prevented me from getting to the aforementioned Darmah frame, complete with swingarm, stand, rear guard and some pretty shitty plastics in time and it was snapped up for a paltry $500 by another bevel enthusiast. Ah well, my loss, anothers gain. Trying to be stoic here but I`m tipping you can all see straight through it. The quest continues................

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