Search found 689 matches

by wdietz186
Mon Feb 05, 2018 11:01 am
Forum: Engine & Transmission Shop
Topic: Valve guide choice
Replies: 11
Views: 1980

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: 1703

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: 1456

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: 1037

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...
by wdietz186
Sun Jan 21, 2018 1:20 pm
Forum: Squarecase BOSCH Ignition Engines > SD, SSD Darmah, late 900 SS & 900 GTS
Topic: SSD will not run past about 4000 rpm
Replies: 6
Views: 2424

Re: SSD will not run past about 4000 rpm

The pickup wires are probably deteriorated and shorting due the insulation falling apart. Harmonic vibration can cause intermittent shorting/misfire. But! I have had 3 bad Bosch ignition boxes fail in the past few years and the symptoms were what you describe. Ok running until the ignition goes to f...
by wdietz186
Mon Jan 01, 2018 5:26 pm
Forum: Engine & Transmission Shop
Topic: New victim in Phoenix AZ (continued from the INTRO section)
Replies: 18
Views: 3811

Re: New victim in Phoenix AZ (continued from the INTRO section)

The big end will have some lateral play [approx. .010"] if my memory serves. Look at the thrust washers between the rods and the crank cheeks to see if they are blued or torn up. You should not feel any radial play or any notchiness when moving the rod. Was the oil you drained metalflaked? That is t...
by wdietz186
Wed Dec 27, 2017 10:48 am
Forum: Engine & Transmission Shop
Topic: New victim in Phoenix AZ (continued from the INTRO section)
Replies: 18
Views: 3811

Re: New victim in Phoenix AZ

Thinking about your symptoms and you saying the heads were redone makes me wonder if you have valves sticking in the guides. If too tight on the exhaust guides it can seize and hold the valve open causing no compression. Depending on the speed and where the valve stuck in its range of travel it may ...
by wdietz186
Tue Dec 26, 2017 6:10 am
Forum: Engine & Transmission Shop
Topic: New victim in Phoenix AZ (continued from the INTRO section)
Replies: 18
Views: 3811

Re: New victim in Phoenix AZ

That much metal transfer in that part of the bore is very unusual. I'd suspect an out of round bore or bound up piston rings. The ring lands are the only real mass in that part of the piston. If it was a heat related seizure I would think the piston crown would be scorched/burnt. Stuck/ damaged ring...
by wdietz186
Sat Nov 04, 2017 8:25 am
Forum: Squarecase Dry Clutch Engines > S2, MHR, 'Mille'
Topic: S2 won't start.
Replies: 11
Views: 2608

Re: S2 won't start.

It sounds like the idle and probably the accel pump circuits are clogged. When they sit for a long time with fuel in them the volatile components of the gas evaporate leaving a brownish muck that quickly solidifies and clogs the jets and passages. Removing the mixture screws and spraying through the...
by wdietz186
Wed Oct 25, 2017 10:06 am
Forum: Electrical and Wiring Shop
Topic: 900S2, no spark, one cylinder
Replies: 2
Views: 1505

Re: 900S2, no spark, one cylinder

Yeah, What Steve said!
by wdietz186
Tue Sep 26, 2017 5:23 am
Forum: Squarecase Dry Clutch Engines > S2, MHR, 'Mille'
Topic: Irridium spark plugs
Replies: 4
Views: 1864

Re: Irridium spark plugs

The Iridium plugs are good if you have upgraded the ignition system. They have a lower firing voltage when they are clean but they do require a higher output ign. system to keep them clean as the center electrode is smaller than regular plugs. The errant blobs of uncombustibles that float around in ...
by wdietz186
Thu Sep 07, 2017 7:55 am
Forum: Electrical and Wiring Shop
Topic: Grounding Engine
Replies: 7
Views: 3638

Re: Grounding Engine

Glad it worked out for you Paul. Remember, most carb issues are electrical and vice versa.
by wdietz186
Thu Sep 07, 2017 7:49 am
Forum: Everything Else Ducati.......
Topic: Ducati deodorant
Replies: 9
Views: 9897

Re: Ducati deodorant

With the Blendzall octane booster I've been using about 1oz. per gallon which is less than recommended on the bottle but enough to give that sweet hint of racing. Using any of the 2 stroke castors I would probably start with around a 60:1 mix and see how it smells [tuning by nose?] you could possibl...
by wdietz186
Wed Aug 30, 2017 8:09 am
Forum: Electrical and Wiring Shop
Topic: Grounding Engine
Replies: 7
Views: 3638

Re: Grounding Engine

Paul, when checking the pickup resistances you also need to check to see if either of the wires on each pickup are shorting to ground. In addition, you need to check if the wires on one pickup are shorting to the other pickup wire[s]. Check one wire from one pickup to one wire of the other pickup,do...
by wdietz186
Wed Aug 23, 2017 7:53 am
Forum: Roundcase Engines > 750 GT, 750 Sport & 750 Super Sport
Topic: 750 GT 74´ wiring diagram
Replies: 2
Views: 2962

Re: 750 GT 74´ wiring diagram

The e start 750 is extremely rare [200 I think] and I've never seen a manual on them. The closest diagram would probably be the early 860 diagram. Looking at it it seems pretty simple, a button to energize the solenoid that gets its power from a switched source[power to the button,pushing the button...

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