Search found 917 matches

by Craig in France
Mon Jul 20, 2020 4:27 am
Forum: Carburettor & Fuel System Shop
Topic: Darmah Front cylinder running rich
Replies: 20
Views: 1534

Re: Darmah Front cylinder running rich

Yes, the taper section is visibly longer. (Estimate 0.5mm.) Inspected both under magnifying light thinking that shorter one may have tampered with but appears to be original. There are at least 3 versions of the PHF/PHM mixture screw, 2 of which you can find on Bevels - see the picture below, with ...
by Craig in France
Sun Jul 19, 2020 2:42 am
Forum: Carburettor & Fuel System Shop
Topic: Darmah Front cylinder running rich
Replies: 20
Views: 1534

Re: Darmah Front cylinder running rich

As suggested i then swapped carbs front to rear. Still backfiring on front cylinder. Good! That's progress, Mark :) You probably know this already, BUT DON'T DISTURB the pick-ups unless you absolutely have to. If you do, they will need to be re-positioned using a special tool, and even then it's no...
by Craig in France
Wed Jul 15, 2020 3:56 am
Forum: Carburettor & Fuel System Shop
Topic: Darmah Front cylinder running rich
Replies: 20
Views: 1534

Re: Darmah Front cylinder running rich

Oh, and maybe this will help.

If your choke piston looks like this, change it.
Worn enricher seal.jpg
by Craig in France
Wed Jul 15, 2020 3:54 am
Forum: Carburettor & Fuel System Shop
Topic: Darmah Front cylinder running rich
Replies: 20
Views: 1534

Re: Darmah Front cylinder running rich

Further thoughts: 1. The idle on a PHF depends on a clean air feed as shown below. Idle air passage.jpg Now, as you can see, that drilling narrows within the carb body. As you can imagine, it can easily get partially blocked at this point - and stay so, even after an ultra-sonic clean. So be very fu...
by Craig in France
Tue Jul 14, 2020 1:02 am
Forum: Carburettor & Fuel System Shop
Topic: Darmah Front cylinder running rich
Replies: 20
Views: 1534

Re: Darmah Front cylinder running rich

Initial quick thoughts/questions: 1. Have you checked for air leaks around the intake manifold, both where it bolts to the head - did you fit a new gasket? - and where the carb clamps on? (Don't over tighten the clamp). Hold the engine at a low idle and get someone to spray something inflammable lik...
by Craig in France
Sat Jul 04, 2020 1:05 am
Forum: Squarecase BOSCH Ignition Engines > SD, SSD Darmah, late 900 SS & 900 GTS
Topic: SSD having trouble getting into neutral while engine running
Replies: 3
Views: 689

Re: SSD having trouble getting into neutral while engine running

Hi Brad, Yeah, they can be a little difficult - me too, SSD owner. The oil change is a good 'first idea'. You should be running a synthetic 10-50 anyways - or at least that's what Ducati told you to do :-D (ref. last page of the owner's handbook). The only problem you may encounter is a little clutc...
by Craig in France
Tue Jun 09, 2020 1:30 am
Forum: Introduce Yourself
Topic: 65-67 Mach 1
Replies: 11
Views: 1232

Re: 65-67 Mach 1

I was stripping more paint on the frame today and found a faintly stamped 350GT in front of the frame number. Interesting! I have found no reference in any of the published sources to this "350GT" frame stamp*. However, I see there are 2 registrations (ref. 1025 & 1031) of bikes with it on the Beve...
by Craig in France
Sun Jun 07, 2020 3:29 am
Forum: Introduce Yourself
Topic: 65-67 Mach 1
Replies: 11
Views: 1232

Re: 65-67 Mach 1

Eldert wrote: Fri Jun 05, 2020 8:38 am Engine is from another bike. It has the large M30 alternator outlet . Early widecase had M22 outlets.
Good one, Eldert - thanks!

Alternator cable gland nuts.jpg
by Craig in France
Fri Jun 05, 2020 2:41 am
Forum: Introduce Yourself
Topic: 65-67 Mach 1
Replies: 11
Views: 1232

Re: 65-67 Mach 1

As Bob: not a Mach 1. Both engine and frame are wide-case. But interesting because ... The homologation number (IGM 1985 OM) is the old narrow case, 250 'Type B' code, that was first issued in November 1964. When the wide cases came in (late 1967- early 1968), this code was initially carried over, u...
by Craig in France
Fri Jun 05, 2020 1:07 am
Forum: Introduce Yourself
Topic: Newbie with 1973 Ducati 750 GT project
Replies: 3
Views: 712

Re: Newbie with 1973 Ducati 750 GT project

Hi Julien and welcome to the Forum, An interesting challenge :) . Frankly, IMO, given where you are in the world, you cannot do better than to ask advice from Steve Allen, the owner of this Forum. With his experience and knowledge of all the people he has dealt with over the years, I feel he will be...
by Craig in France
Tue Apr 14, 2020 11:33 pm
Forum: Squarecase Dry Clutch Engines > S2, MHR, 'Mille'
Topic: Fuel pouring from carby
Replies: 16
Views: 3010

Re: Fuel pouring from carby

I didn't think it likely that the float valves would have aged and hardened. You could be right; but every spring I have to replace float valves in Dell'Orto carbs, float valves that have stopped sealing in less than 4 months of inactivity. And judging from reports on other forums, I'm far from bei...
by Craig in France
Sat Apr 11, 2020 12:26 am
Forum: Squarecase Dry Clutch Engines > S2, MHR, 'Mille'
Topic: Fuel pouring from carby
Replies: 16
Views: 3010

Re: Fuel pouring from carby

What should I do next? Thanks. Very, very simple. Buy a new float valve from Steve ... https://store.bevelheaven.com/Dellorto/Float-Needle-Valve-250/ ... and install as per the instructions above. A wise man would do this with both carbs. You might also consider buying one of Steve's float height g...
by Craig in France
Wed Oct 16, 2019 2:21 am
Forum: Wheel, Brake & Tyre Shop
Topic: Check your pins and pads
Replies: 1
Views: 1928

Re: Check your pins and pads

Gardner wrote: Tue Oct 15, 2019 5:49 am <snip>Hopefully no debris finds it's way in.
I think you can sleep ok. The Goldline range never had any covers in the first place, and I haven't heard of anyone having had problems (and I haven't had any either ... 8) )
by Craig in France
Sat Oct 12, 2019 2:19 am
Forum: Carburettor & Fuel System Shop
Topic: PHF32 accelerator pump - Darmah
Replies: 5
Views: 2935

Re: PHF32 accelerator pump - Darmah

Ok, let's start by going back to basics :) . Why do carburetor manufacturers install accelerator pumps? Pumps are fitted to provide the temporary shot of additional fuel that is required under rapid acceleration. Without pumps, the engine may starve and falter. This Wikipedia description is pretty g...
by Craig in France
Fri Sep 13, 2019 2:01 am
Forum: Electrical & Gauges Shop
Topic: Another dreaded regulator/rectifier question
Replies: 2
Views: 2997

Re: Another dreaded regulator/rectifier question

Took some time to find, but here's your answer, Andy ... Regolatore.jpg Explanation: G = giallo = yellow = alternator x2 + B = battery positive L= luce oppure spia = idiot light C = chiave = ignition switch It's also possible to work it out from the F1 wiring diagram .. but it ain't easy :shock: P.s...

Go to advanced search