Search found 918 matches
- Tue Jul 21, 2020 4:09 am
- Forum: Carburettor & Fuel System Shop
- Topic: Darmah Front cylinder running rich
- Replies: 22
- Views: 3684
Re: Darmah Front cylinder running rich
I am just waiting on getting a 22mm bolt turned down so i can remove engine side cover to inspect pickups. In practice, you don't need to fab up a puller, Mark. Once all the screws around the cover are out, some gentle taps with a rubber mallet all around the casing will release it. (I guess you kn...
- Mon Jul 20, 2020 4:27 am
- Forum: Carburettor & Fuel System Shop
- Topic: Darmah Front cylinder running rich
- Replies: 22
- Views: 3684
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 ...
- Sun Jul 19, 2020 2:42 am
- Forum: Carburettor & Fuel System Shop
- Topic: Darmah Front cylinder running rich
- Replies: 22
- Views: 3684
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...
- Wed Jul 15, 2020 3:56 am
- Forum: Carburettor & Fuel System Shop
- Topic: Darmah Front cylinder running rich
- Replies: 22
- Views: 3684
Re: Darmah Front cylinder running rich
Oh, and maybe this will help.
If your choke piston looks like this, change it.
If your choke piston looks like this, change it.
- Wed Jul 15, 2020 3:54 am
- Forum: Carburettor & Fuel System Shop
- Topic: Darmah Front cylinder running rich
- Replies: 22
- Views: 3684
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...
- Tue Jul 14, 2020 1:02 am
- Forum: Carburettor & Fuel System Shop
- Topic: Darmah Front cylinder running rich
- Replies: 22
- Views: 3684
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...
- 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: 1245
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...
- Tue Jun 09, 2020 1:30 am
- Forum: Introduce Yourself
- Topic: 65-67 Mach 1
- Replies: 11
- Views: 2282
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 ...
- Sun Jun 07, 2020 3:29 am
- Forum: Introduce Yourself
- Topic: 65-67 Mach 1
- Replies: 11
- Views: 2282
- Fri Jun 05, 2020 2:41 am
- Forum: Introduce Yourself
- Topic: 65-67 Mach 1
- Replies: 11
- Views: 2282
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...
- Fri Jun 05, 2020 1:07 am
- Forum: Introduce Yourself
- Topic: Newbie with 1973 Ducati 750 GT project
- Replies: 3
- Views: 1243
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...
- Tue Apr 14, 2020 11:33 pm
- Forum: Squarecase Dry Clutch Engines > S2, MHR, 'Mille'
- Topic: Fuel pouring from carby
- Replies: 16
- Views: 4602
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...
- Sat Apr 11, 2020 12:26 am
- Forum: Squarecase Dry Clutch Engines > S2, MHR, 'Mille'
- Topic: Fuel pouring from carby
- Replies: 16
- Views: 4602
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...
- Wed Oct 16, 2019 2:21 am
- Forum: Wheel, Brake & Tyre Shop
- Topic: Check your pins and pads
- Replies: 1
- Views: 2351
- Sat Oct 12, 2019 2:19 am
- Forum: Carburettor & Fuel System Shop
- Topic: PHF32 accelerator pump - Darmah
- Replies: 5
- Views: 3593
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...