Search found 658 matches

by wdietz186
Mon May 29, 2017 8:49 am
Forum: Carburettor & Fuel System Shop
Topic: custom/modified rear intake manifold
Replies: 4
Views: 2046

Re: custom/modified rear intake manifold

Craig is on the money. The 40mm Dellorto carbs don't really add anything by themselves, you need cams, pistons, and port work for noticeable performance gains but doing so will affect the tractability. The 40mm carbs are pretty crude and don't atomize the fuel well at low air velocity and getting th...
by wdietz186
Sat May 27, 2017 4:34 pm
Forum: Squarecase BOSCH Ignition Engines > SD, SSD Darmah, late 900 SS & 900 GTS
Topic: Starter issue
Replies: 13
Views: 2712

Re: Starter issue

Follow the heavy lead from the starter, it will end at the solenoid. Can't remember where it is located on the Darmah, probably mounted under the battery tray. If you drill out the rivets holding the cap on the solenoid you can get to the contacts. They most likely are burnt and the surface is rough...
by wdietz186
Sat May 27, 2017 5:46 am
Forum: Squarecase BOSCH Ignition Engines > SD, SSD Darmah, late 900 SS & 900 GTS
Topic: Starter issue
Replies: 13
Views: 2712

Re: Starter issue

I think Craig is on the money. Those solenoids do act up after thirty years or more. The starter brushes being worn will cause a high current draw and that will accelerate the degradation of the copper contacts in the solenoid. Being inquisitive [cheap really] I drilled out the rivets holding mine t...
by wdietz186
Fri May 26, 2017 6:25 am
Forum: Bevel Head Twins Photo Gallery
Topic: What's wrong with this picture?
Replies: 12
Views: 7909

Re: What's wrong with this picture?

Could it possibly be a factory proofing indicator to indicate the exhaust is tight or maybe a post road test indicator? Most manufacturers have some proof system [paint marks,stickers, etc.] to indicate proper or finished assembly so maybe it is the way Ducati marked it as ready. OR it was a Friday ...
by wdietz186
Mon May 22, 2017 6:45 am
Forum: Electrical and Wiring Shop
Topic: 1983 MHR 900 electric start.
Replies: 1
Views: 1121

Re: 1983 MHR 900 electric start.

What were at one time considered eternal, the ignition amplifiers do seem to be starting to fail after only about 25 years. I've seen them work OK when cold and then go wonky as the engine warms. Some will not advance or retard causing irregular running and hard starts. Try switching the plug leads ...
by wdietz186
Tue May 16, 2017 6:27 am
Forum: Squarecase BOSCH Ignition Engines > SD, SSD Darmah, late 900 SS & 900 GTS
Topic: Oil leak - need to remove horizontal cylinder head and cylinder
Replies: 5
Views: 1555

Re: Oil leak - need to remove horizontal cylinder head and cylinder

There is no gasket between the head and the cylinder only two o rings that seal the oil passages. The cylinder sleeve to head junction is a spigot fit and seals just fine if everything is clean and flat. I have seen on occasion a stud pulling out of the case. You could try checking the cyl. nut torq...
by wdietz186
Mon May 15, 2017 4:07 pm
Forum: Squarecase BOSCH Ignition Engines > SD, SSD Darmah, late 900 SS & 900 GTS
Topic: Oil leak - need to remove horizontal cylinder head and cylinder
Replies: 5
Views: 1555

Re: Oil leak - need to remove horizontal cylinder head and cylinder

There are 2 o rings located around dowels that seal the oil passages. You probably should replace the exhaust gaskets and possibly the carb insulators too. the carb insulators tend to leak vacuum when they get old and shrink. Being the horizontal cylinder it is an easy job, Exhaust, carb, tach cable...
by wdietz186
Mon May 15, 2017 7:35 am
Forum: Squarecase BOSCH Ignition Engines > SD, SSD Darmah, late 900 SS & 900 GTS
Topic: oil leak from vertical bevel tube base
Replies: 2
Views: 1244

Re: oil leak from vertical bevel tube base

In a word,NOPE! But you can try turning the tube back and forth and push it up or down in the holder. I've stopped a few leaks that way. It seems the o ring develops a flat spot and/or a particle of crud disturbs the seal allowing seepage. I used a pair of pliers that are for removing hoses [needle ...
by wdietz186
Sat May 13, 2017 7:06 pm
Forum: Roundcase Engines > 750 GT, 750 Sport & 750 Super Sport
Topic: Roundcase cam specs
Replies: 14
Views: 6486

Re: Roundcase cam specs

There is nothing Ducati specific out there that I know of. You will need a degree wheel,a dial indicator,and a way to turn the crank in small increments. The basics are covered in many hot rod books and cam manufacturers catalogs. These will explain what is supposed to happen, when and why. The big ...
by wdietz186
Sun Apr 30, 2017 8:26 am
Forum: Roundcase Engines > 750 GT, 750 Sport & 750 Super Sport
Topic: Roundcase cam specs
Replies: 14
Views: 6486

Re: Roundcase cam specs

I would start with checking and correcting the timing of the cams you have. Considering the assembly differences of the engines of the time you might find a performance boost by bringing the timing into spec. I've been meaning to do my GT for a long time but stuff keeps getting in the way. It's real...
by wdietz186
Fri Apr 21, 2017 3:35 pm
Forum: Engine & Transmission Shop
Topic: Clutch Basket Bearing Recommendations? 860GT
Replies: 58
Views: 13287

Re: Clutch Basket Bearing Recommendations? 860GT

Sometimes, depending on the finish of the contact area of the nut, the lock tab will move with the nut tearing the tab out of the notch it sits in. I've taken to marking the washer and the location of the notch to check for movement after torquing. I also try to bend the tab 180 deg. from the locati...
by wdietz186
Thu Feb 09, 2017 8:56 am
Forum: Wheel, Brake & Tyre Shop
Topic: Best tyres for 1977 900 SS (original Borrani 4777 rims)
Replies: 8
Views: 3379

Re: Best tyres for 1977 900 SS (original Borrani 4777 rims)

The BT45 tires are highly regarded by the Laverda community as offering good grip and lasting fairly long. The tread patterns are close enough to being considered period for 70's era bikes. The V rated are the tires you want.
by wdietz186
Tue Jan 31, 2017 5:45 pm
Forum: Introduce Yourself
Topic: Major issues with the site, I cannot see past the horrible pizalshions
Replies: 4
Views: 2062

Re: Major issues with the site, I cannot see past the horrible pizalshions

Happened to me too! Kinda muddled through it after reading the orig. post. Thought I had committed some unpardonable sin.Glad to be back to normal.
by wdietz186
Sat Jan 14, 2017 7:31 pm
Forum: Squarecase Dry Clutch Engines > S2, MHR, 'Mille'
Topic: best way to remove center stand?
Replies: 3
Views: 1501

Re: best way to remove center stand?

Probably the easiest way would be one one those roll in front wheel chocks that grab the front wheel and hold the bike vertical. A swing arm stand would also do the job. Lacking either of those, a convenient wall and a brick on either side of the front or rear wheel[to prevent rolling] would do the ...

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