Search found 298 matches

by ducadini
Mon Sep 08, 2025 12:29 am
Forum: 'Reverse Head' Pantah Engines [rear exhaust faces rearward] > Indiana, Elefant, Paso 350/750, 750 Sport & SS, Monster 600/750
Topic: 900 Pantah
Replies: 2
Views: 23933

Re: 900 Pantah

You should reinforce the engine mounts (especially the rhs front)It's there where the early Pantah cases cracked under stress of the (then) 750 conversions. Take a llo at the "NCR" type frame, that should give You an idea how to do it.

regards,
ducadini
by ducadini
Mon Sep 08, 2025 12:25 am
Forum: 'Straight Head' Pantah Engines [rear exhaust faces forward] > F1, F3, Pantah, TL, XL, TT1, TT2, Al'Azzurra
Topic: Pantah 500 SL restoration
Replies: 8
Views: 16955

Re: Pantah 500 SL restoration

Maybe we've "met" through another MM canal, but this is a 79 Pantah 500. You say the framenumeber indicates it's a 350 ? How did You come to this ?
Rims (clear edge), tank (screw-cap on top AND bgger than later tanks), seat (glassfiber with detachable cover with 2 screws on top) are the marks of the ...
by ducadini
Sun Dec 04, 2022 3:12 am
Forum: Squarecase Early 860/900 Crossover Gearchange Engines > 860/900 GT
Topic: Ducati 860 GTS 1975 - Help!
Replies: 5
Views: 41605

Re: Ducati 860 GTS 1975 - Help!

Our experience with the old Ducati Elletronica ignition is : when it works, it works. First thing to go is the low-rev part : difficult starting because it's running on one cylinder until revs go over 2k, then the "defect" ignition kicks back in. No problem for racing :-D . The moment both low-revs ...
by ducadini
Tue Nov 22, 2022 1:34 pm
Forum: Parallel Twin Engines > GTL/Sport Desmo 350 & 500
Topic: Advice on a GTL 500
Replies: 1
Views: 22277

Re: Advice on a GTL 500

Our first Ducati was a SD500. Best steering bike till now (still have to rebuild the F3/F1).
As You said : those parallel twins had some issues so after two years we bought a Darmah.
Current userbike is a US Paso 750. Not daily, but at least a tank/week.
If it wasn't so bloody difficult to work on ...
by ducadini
Tue Nov 22, 2022 1:23 pm
Forum: Squarecase Early 860/900 Crossover Gearchange Engines > 860/900 GT
Topic: Ducati 860 GTS 1975 - Help!
Replies: 5
Views: 41605

Re: Ducati 860 GTS 1975 - Help!

You're sure Your timing's "on the dots" ? Rather easy to check behind the covers on top of the bevels. Remember it could take some turns to align.
You're sure You plugged the correct cylinders ? Remember this engine turns backwards.
And of course : RTFM.

have fun, we did on ours

ciao
ducadini
by ducadini
Wed Feb 02, 2022 2:54 am
Forum: Chassis & Suspension Shop
Topic: Fluid quantity for Rear Marzocchi - 1973 750 GT
Replies: 2
Views: 9110

Re: Fluid quantity for Rear Marzocchi - 1973 750 GT

@Peter : Ducaccino was asking for the rear shockabsorbers.

@ Ducaccino : did a "quick" search through our manuals but apart from the rebuild of the separate reservoir Marzocchi : nothing else on rebuilding earlier stuff. Just a mention that they should be overhauled every 30-40K.

If nothing turns ...
by ducadini
Sat Jan 15, 2022 9:17 am
Forum: Carburettor & Fuel System Shop
Topic: Pantah 500 Carbies
Replies: 8
Views: 19345

Re: Pantah 500 Carbies

Before You start filing away : does anybody have acces to the measurements of 32 Dell'Orto slides ?
IIRC (they are TOO difficult to get to now) they have the same diameter, and there could be different cutaways.
In the partslist of the 650 Alazzurra, the USA part has indeed less cutaway than the EU ...
by ducadini
Thu Jan 06, 2022 4:58 am
Forum: Engine & Transmission Shop
Topic: Restoration almost complete. Won’t start
Replies: 6
Views: 16868

Re: Restoration almost complete. Won’t start

Unless You've done something VERY extraordinary, Your bike HAS electronic ignition. But switch two near identical wires from the pickup and trouble starts. Follow the manual and everything should work. Don't forget a bevel crank spins backwards.
ciao
ducadini
by ducadini
Mon Oct 25, 2021 1:31 am
Forum: Carburettor & Fuel System Shop
Topic: darmah - leaky 36mm dell'orto carb (and headlight reflector repair?)
Replies: 9
Views: 17517

Re: darmah - leaky 36mm dell'orto carb (and headlight reflector repair?)

If You had the bike with closed petcocks for a longer time, carb may have been gummed a bit. Flowing gas may have cleaned some debri away.
A lot of assumptions but try to empty them before putting it away, unless You ride it very regularly.
BTW : when You have the contact ON and You push the ...
by ducadini
Sun Oct 24, 2021 7:39 am
Forum: Engine & Transmission Shop
Topic: Clearance between desmo opening rockers
Replies: 3
Views: 11402

Re: Clearance between desmo opening rockers

Yes Andy, we're only discussing the sideways play.
IIRC (familytime now so garage is off-limits) You should have about 1 mm to play with those closing rockers without interference with the valvestem.
If this isn't enough, I would grind a bit of the sideway shim-side of the rocker, NOT the part that ...
by ducadini
Sun Oct 24, 2021 7:16 am
Forum: Carburettor & Fuel System Shop
Topic: Pantah 500 Carbies
Replies: 8
Views: 19345

Re: Pantah 500 Carbies

the original Dell'Orto PFH 36 AD & AS carbies are playing up big time on my Pantah 500SL.
So did they work fine before ?
I have cleaned them and replaced obviously worn parts and rebuilt them.
What are "obviously worn parts"?
I am considering replacing them as the plug keep getting fouled after ...
by ducadini
Mon Oct 18, 2021 8:16 am
Forum: Engine & Transmission Shop
Topic: Clearance between desmo opening rockers
Replies: 3
Views: 11402

Re: Clearance between desmo opening rockers

Fitting the cam without tightening it (just enough to compress the shims), then shim the closers, then the openers (just sideways, valveplay comes later). If needed You can always shim the camshaft a bit more out or in (and then the closers and openers).
And yes, it can be close in some heads, we ...
by ducadini
Tue Aug 17, 2021 10:36 am
Forum: Wheel, Brake & Tyre Shop
Topic: Rear brake linkages - 900ss
Replies: 5
Views: 14818

Re: Rear brake linkages - 900ss

Weren't these M7 AND left or right threaded ??
I dumped those, replaced them with ball/head couplings and aluminium bars.
Kept the original ones buried deep.

ciao
ducadini
by ducadini
Tue Aug 17, 2021 10:31 am
Forum: Introduce Yourself
Topic: Intro
Replies: 2
Views: 10798

Re: Intro

Not even a (printed) partslist was published so originality of GF parts is always a point of discussion.
Sure hope that (if it is a genuine GF) all parts are there. Otherwise : caveat emptor.
As Craig said, the GF (or better 1974 SS) was only 401 (or 411) times assembled, so roughly 800 still exist ...
by ducadini
Sun Jun 27, 2021 8:15 am
Forum: Engine & Transmission Shop
Topic: 860GT Clutch Basket play , excessive?
Replies: 2
Views: 10983

Re: 860GT Clutch Basket play , excessive?

Better change the bearings, when getting of the line the primary puts some sideload on the basket and it could rub against the crankcase.

ciao
ducadini

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