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by wdietz186
Tue Jun 12, 2018 7:47 am
Forum: Bevel Head Twins Photo Gallery
Topic: Finishing restoration on ‘74 GT750
Replies: 1
Views: 61

Re: Finishing restoration on ‘74 GT750

Looks mostly restored as it is! Should be an easy one.
by wdietz186
Wed May 30, 2018 5:44 pm
Forum: Squarecase BOSCH Ignition Engines > SD, SSD Darmah, late 900 SS & 900 GTS
Topic: Do I need to change valve seats for lead-free gas?
Replies: 2
Views: 98

Re: Do I need to change valve seats for lead-free gas?

No, That issue related to cast iron valve seats. Ducati use a bronze alloy so no worries.
by wdietz186
Thu May 17, 2018 7:12 pm
Forum: Squarecase BOSCH Ignition Engines > SD, SSD Darmah, late 900 SS & 900 GTS
Topic: Clutch basket bearings.
Replies: 6
Views: 344

Re: Clutch basket bearings.

It's been a while and I don't have one handy but I recall a shim or two between the bearings in the basket and only 1 locating lip in the basket. That might be the source of the play if the fit of the bearing isn't tight in the basket and the bearings aren't butted together with the hub tight. OR th...
by wdietz186
Mon Mar 19, 2018 6:10 am
Forum: Chassis & Suspension Shop
Topic: 860GTS into Darmah
Replies: 2
Views: 682

Re: 860GTS into Darmah

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 shoul...
by wdietz186
Wed Mar 14, 2018 5:42 pm
Forum: Squarecase BOSCH Ignition Engines > SD, SSD Darmah, late 900 SS & 900 GTS
Topic: Sync beavel gear
Replies: 17
Views: 1432

Re: Sync beavel gear

Magnus, You don' need to loosen the cyl. head nuts. the tube has clearance on both ends when the head is bolted down. Just turning the tube a bit each way usually does the trick. Others have cleaned around the base of the tube and the top of the bevel housing and smeared silicone sealer into the cra...
by wdietz186
Tue Mar 13, 2018 5:22 pm
Forum: Squarecase BOSCH Ignition Engines > SD, SSD Darmah, late 900 SS & 900 GTS
Topic: SS desmo cams in GTS motor
Replies: 3
Views: 493

Re: SS desmo cams in GTS motor

They will physically fit but... The opening lobe is much thinner than the springer lobe and likely won't stand up to the loading imposed by the valve spring and the opening/closing events are rather sudden which in addition to wear would probably make a lot of noise. Also without having the pieces i...
by wdietz186
Tue Mar 13, 2018 7:06 am
Forum: Squarecase BOSCH Ignition Engines > SD, SSD Darmah, late 900 SS & 900 GTS
Topic: Sync beavel gear
Replies: 17
Views: 1432

Re: Sync beavel gear

What has worked in the past for me is turning the tube some to relax the o ring that has twisted slightly in its seat. This happens when the tube is pushed in and the ring catches on the tube and distorts allowing oil past. Turning the tube can be difficult due to the limited clearance but I've been...
by wdietz186
Sat Feb 24, 2018 4:30 pm
Forum: Carburettor & Fuel System Shop
Topic: 860GT intake manifold: stuck
Replies: 6
Views: 774

Re: 860GT intake manifold: stuck

Try using a heat gun [or hair dryer] on it and get it really warm. Some gentle tapping around the flange might help too, but be careful the metal is pretty thin there. A twist and yank usually does it.
by wdietz186
Tue Feb 20, 2018 10:32 am
Forum: Engine & Transmission Shop
Topic: Ducati 860 GT Bevel gear lash
Replies: 6
Views: 546

Re: Ducati 860 GT Bevel gear lash

The original gaskets were thin paper so avoid any new ones that that are stamped out of thick,card like material. If the old ones aren't torn or otherwise damaged you could re use them with a thin smear of aviation Permatex [the thin brown liquid] or other gasket shellac. At the factory the gears we...
by wdietz186
Fri Feb 16, 2018 7:07 am
Forum: Squarecase Right Hand Gearchange Engines > early 900SS
Topic: 76 900 SS Right foot gearchange
Replies: 2
Views: 595

Re: 76 900 SS Right foot gearchange

Different market bikes may have used the earlier frame/cases. Does your engine have the boss cast into the case and primary cover for the cross shaft? The frame for the left shift models will have a bracket on the right side to mount the rear master cylinder at the muffler mount bracket. I converted...
by wdietz186
Wed Feb 07, 2018 3:01 pm
Forum: Engine & Transmission Shop
Topic: Valve guide choice
Replies: 9
Views: 606

Re: Valve guide choice

Richard, The rocker faces need to be hard chromed not chrome plated. Regular chrome plating will not last as it is very thin and the copper and nickel under it is very soft. I think Megacycle can repair your rockers, they regrind the profile and apply a stellite surface which is very hard and wear r...
by wdietz186
Mon Feb 05, 2018 11:01 am
Forum: Engine & Transmission Shop
Topic: Valve guide choice
Replies: 9
Views: 606

Re: Valve guide choice

I'm not aware of anyone producing iron guides for Ducati bevels. The stock bronze guides seemed to have been made of Parmesan and were lucky to have made 6,000 mi. before allowing oil to run into the exhaust system. Kibblewhite Precision make very good replacement guides for Ducati and are widely us...
by wdietz186
Wed Jan 31, 2018 5:49 pm
Forum: Wheel, Brake & Tyre Shop
Topic: 76 750ss wheel hub finish
Replies: 6
Views: 623

Re: 76 750ss wheel hub finish

On mine and all the others I can recall only the center section of the hubs[between the spokes] were polished, with the drive hub and disc adapters in a natural as cast finish.
by wdietz186
Wed Jan 31, 2018 5:41 pm
Forum: Engine & Transmission Shop
Topic: 860Gt intake port flash - anybody seen this?
Replies: 7
Views: 545

Re: 860Gt intake port flash - anybody seen this?

Yours is a little excessive but not unusual and cleaning it up probably won't make whole lot of difference. When the bike was produced the company was in pretty deep financial straits and doing careful hand work like that likely wasn't in the pay plan.If you put the manifolds up to the holes in the ...
by wdietz186
Tue Jan 30, 2018 10:43 am
Forum: Engine & Transmission Shop
Topic: vertical cylinder head removal 900GTS
Replies: 1
Views: 379

Re: vertical cylinder head removal 900GTS

You can't pull the vert. head without dropping the engine down. It can be done by swinging the engine down on the lower mounting bolt but with all you have to disconnect it's just about as easy to drop the whole thing. In light of it's age it would be prudent to reseal both heads and the bevel tubes...

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