A A A
Avatar

Please consider registering
Guest

Search

— Forum Scope —






— Match —





— Forum Options —





Minimum search word length is 3 characters - maximum search word length is 84 characters

Register Lost password?
sp_Feed sp_PrintTopic sp_TopicIcon
D1 carburettor replacement with modern Dellorto PHBG 18AS
Avatar
Cornish Rooster
Area Rep
Club Member
Forum Posts: 3314
Member Since:
September 28, 2011
sp_UserOfflineSmall Offline
41
June 18, 2012 - 2:29 pm
sp_Permalink sp_Print

Someone looking for info on the Dellorto I understand.

Phil

BSA Bantam D1 "150" in use regularly often as general purpose transport, quite a few other bikes as well. Cornwall Area Rep. 

Avatar
angus
Guest
Guests
42
June 23, 2012 - 7:39 am
sp_Permalink sp_Print

Cornish Rooster said
You can see the choke arrangement, and mixture/ throttle stop screws on this side. Yes one thing is the standard throttle cable fits with no modification required. Complete with the intake trumpet this lot cost £120 which sounds a bit pricey but seeing complete D1 carbs are going for around £75 on Ebay and still you are buying a fifty year old plus carb maybe thats not so bad ?

 

could you please let me know where to buy this carb ,i have a 1952 d1 comp with a amal 523 which seems knackered thanks angus

Avatar
Anderzander
Lancashire
Top Gear User
Site Member
Forum Posts: 3208
Member Since:
October 29, 2011
sp_UserOfflineSmall Offline
43
June 23, 2012 - 8:40 am
sp_Permalink sp_Print

Angus - that's a D3 carb - Has your bike been increased to 150cc with a D3 top end ?

Avatar
angus
Guest
Guests
44
June 24, 2012 - 7:02 am
sp_Permalink sp_Print

Anderzander said
Angus - that's a D3 carb - Has your bike been increased to 150cc with a D3 top end ?

i dont know just removed the barrel on my bike that is fitted with a competion head to see why no petrol reaching plug to find i have no piston rings fitted looks like a newish piston ,one problem solved one more problem found thanks angus

Avatar
South Aus Dave
Guest
Guests
45
November 9, 2013 - 12:01 pm
sp_Permalink sp_Print

Ok finally made the plunge. Ordered a Dellorto, a set of jets and a joiner of flea bay to go on my daughters D1. Have to come from Germany and I'm working in the bush at the moment, so should be home when I return.

 

Have I missed anything? 

 

Any recommendations with regards to initial set up?

** Please log in to view **

** Please log in to view **

** Please log in to view **

 

All advice gratefully accepted.

Regards Dave.

Avatar
Blue Heeler
Top Gear User
Site Member
Forum Posts: 2139
Member Since:
November 16, 2011
sp_UserOfflineSmall Offline
46
November 9, 2013 - 1:18 pm
sp_Permalink sp_Print

Das ist sehr gut!tip-my-hat

Look forward to hearing how she runs.Plenty of scope for tuning I should think.

 

Blue

Avatar
HowD1
Exeter, Devon.
Top Gear User
Club Member
Forum Posts: 1943
Member Since:
November 23, 2011
sp_UserOfflineSmall Offline
47
November 9, 2013 - 6:27 pm
sp_Permalink sp_Print

Phil Keast (Cornish Rooster) is your man but he's out of operation e-wise right now. He's back on line soon I reckon and he's the one to talk to.

Avatar
South Aus Dave
Guest
Guests
48
November 12, 2013 - 10:11 am
sp_Permalink sp_Print

Cheers guys! I will keep you posted.

Avatar
neddyo
Adelaide, Australia
Top Gear User
Site Member
Forum Posts: 318
Member Since:
February 12, 2012
sp_UserOfflineSmall Offline
49
November 12, 2013 - 9:06 pm
sp_Permalink sp_Print

I fitted one of these carbs to an le velocette and managed to bore out the plastic sleeve

to 25.4. It ends up very thin but so far no problems.

The carby came set up for the le by the supplier eurocarb ltd.

When it came it had the choke lever on the carby which I found

not very easy to use, I latter ordered the cable operated set up and found it

much better up on the handle bars.

Fantastic starter, perfect idle, about the same through the rest of the range

and how about no fuel on the outside of the carby!!!!thumbs-up

 

Nick.

Avatar
Jack Owl
Second Gear User
Site Member
Forum Posts: 18
Member Since:
November 17, 2013
sp_UserOfflineSmall Offline
50
November 22, 2013 - 2:33 am
sp_Permalink sp_Print

will this one work on a 125cc d1?

** Please log in to view **

Avatar
cocorico
Central France
Top Gear User
Site Member
Forum Posts: 2975
Member Since:
June 23, 2013
sp_UserOfflineSmall Offline
51
November 22, 2013 - 8:50 am
sp_Permalink sp_Print

It looks set for oil injection (which you could just blank off), but then you would most likely need to play with the jetting.

You would also need a rubber sleeve to slip over the inlet stub and the carb.

I have a Dellorto 19mm fitted to the Major which fits fine with the rubber mount, though I've not got it running right yet (but that's another story).

 

1956 D3 running, lights to sort. 7 other bikes in the Barn, 6 runners (when I get time!) and a still in progress Morini 250

Avatar
Cornish Rooster
Area Rep
Club Member
Forum Posts: 3314
Member Since:
September 28, 2011
sp_UserOfflineSmall Offline
52
November 22, 2013 - 11:50 am
sp_Permalink sp_Print

OK I'm back again after my spell working away, pleased to say my D1 started second kick after being unused for almost three months and is now back in service for everyday use.

Onto the Dellorto carb subject, be aware that some of these carb on the links posted may or may not be for "pre-mix" they may be for metered oil supply. The one I used is definitely for two stroke application and will work on a pre-mix engine although is obviously more expensive than some of the ones posted, also how well a "racing" type carb will work is another matter. For the stub fitting on mine I removed the plastic bush and used some shim to get a good fit onto the inlet stub.

Any questions let me know.

Phil

BSA Bantam D1 "150" in use regularly often as general purpose transport, quite a few other bikes as well. Cornwall Area Rep. 

Avatar
Cornish Rooster
Area Rep
Club Member
Forum Posts: 3314
Member Since:
September 28, 2011
sp_UserOfflineSmall Offline
53
November 22, 2013 - 11:56 am
sp_Permalink sp_Print

The "flip up" choke lever arrangement I fitted is a bit more user friendly than the originally fitted arrangement, the parts required are available from Dellorto UK. Another useful part available is a clear plastic float bowl, with this not only can you see the actual fuel level but also any accumulated crud !

Phil

BSA Bantam D1 "150" in use regularly often as general purpose transport, quite a few other bikes as well. Cornwall Area Rep. 

Avatar
South Aus Dave
Guest
Guests
54
November 30, 2013 - 10:29 am
sp_Permalink sp_Print

Ok. Got home from the bush last night after 32 days on night shift with only 4 nights off.

Into the shed today with my new Stylepro Dellotoro PHBG 19 and as per the good forum a set of main jets, 70 to 92 in size likewise optained, and swapped out the 75 for an 82.

The Au atomizer (That's American for 'Atomiser' isn't it?), is a 262. Bottom line is the old girl actually started on the third kick, but had to be throttle nursed to keep ticking over.

Mix was 25:1, and the exhaust was white and fairly pungent, plugs were a lovely dark beige. But! This is a false idle, and so is essentially irrelivant (I assume).

I am a bit at a loss, somewhere I read that the jets to start with should be 82 (main) and 185.  Here my ignorance shines, Idle jets in the manual only go to 70, so have I got my jets 'scrambled' as it were, and should I be going for a 185 main, and an 82 Idle?

Suggestions - pleeese?

(Oh yes, and the stator? - I rebuilt the «censored» from the ground up leaving the capacitor until last, because I was told from so many sources that they are essentially 'bomb proof'.  Big mistake - last resort, new capacitor, and she behaves like a multiple lightening strike. so now carburation is the last frontier.)

Avatar
Cornish Rooster
Area Rep
Club Member
Forum Posts: 3314
Member Since:
September 28, 2011
sp_UserOfflineSmall Offline
55
November 30, 2013 - 10:56 am
sp_Permalink sp_Print

What "manual" are you getting this info from ? 185 for a main jet on this size engine is huge, same goes for the idle jet !!

 

BSA Bantam D1 "150" in use regularly often as general purpose transport, quite a few other bikes as well. Cornwall Area Rep. 

Avatar
Cornish Rooster
Area Rep
Club Member
Forum Posts: 3314
Member Since:
September 28, 2011
sp_UserOfflineSmall Offline
56
November 30, 2013 - 11:03 am
sp_Permalink sp_Print

So what have you presently fitted main and pilot jet wise ? One more thing myself and quite a few others find these bikes run better with a pre-mix ratio of around 32 to 35 to 1 (unless running in) though I ran mine in on this ratio with no issues.

BSA Bantam D1 "150" in use regularly often as general purpose transport, quite a few other bikes as well. Cornwall Area Rep. 

Avatar
Cornish Rooster
Area Rep
Club Member
Forum Posts: 3314
Member Since:
September 28, 2011
sp_UserOfflineSmall Offline
57
November 30, 2013 - 11:18 am
sp_Permalink sp_Print

The Dellorto that I was using on my D3 has a 90 main jet and a 60 pilot, not saying this is perfect but seemed not far off, almost certainly the 60 pilot jet is a bit big but that's not so much of an issue as the flow is metered by the mixture screw. 

BSA Bantam D1 "150" in use regularly often as general purpose transport, quite a few other bikes as well. Cornwall Area Rep. 

Avatar
South Aus Dave
Guest
Guests
58
December 4, 2013 - 8:49 pm
sp_Permalink sp_Print

Hi guys, back in the bush (A few km's out of Coober Pedy - Prominent Hill), for a few more days, so I'll have to wait till I get home again to give you any intelligent response.

Avatar
South Aus Dave
Guest
Guests
59
December 4, 2013 - 8:55 pm
sp_Permalink sp_Print

Cornish Rooster said
What "manual" are you getting this info from ? 185 for a main jet on this size engine is huge, same goes for the idle jet !!

The 'manual' I referred to was infact a catalogue of Dellotoro parts, sorry - night shift brain scrambled.

The figures 82 main and 185 I actually gleaned from a post on this site. In a few days I'll trawl through and give you a reference.

This is stating the obvious, but the same catalogue also differentiates between 2 and 4 stroke atomisers (as I also believe the dellorto site does), Au designating 2 stroke.

 

Avatar
cocorico
Central France
Top Gear User
Site Member
Forum Posts: 2975
Member Since:
June 23, 2013
sp_UserOfflineSmall Offline
60
December 4, 2013 - 9:14 pm
sp_Permalink sp_Print

South Aus Dave said
Hi guys, back in the bush (A few km's out of Coober Pedy - Prominent Hill), for a few more days, so I'll have to wait till I get home again to give you any intelligent response.

 

Looking for opals, Dave?

I'm following this post with interest as I'm also trying to set up a Dellorto PHBG on the Major.

I've got the right atomiser, but I think I still have to play with the main and starter jets (and probably the engine seals!).

1956 D3 running, lights to sort. 7 other bikes in the Barn, 6 runners (when I get time!) and a still in progress Morini 250

Forum Timezone: Europe/London

Most Users Ever Online: 223

Currently Online:
8 Guest(s)

Currently Browsing this Page:
1 Guest(s)

Top Posters:

Cornish Rooster: 3314

Anderzander: 3208

bart: 3134

cocorico: 2975

Sprung Chicken: 2650

Mags 1: 2612

David Dale: 2489

Munchkin: 2229

Blue Heeler: 2139

Katj: 2138

Newest Members:

_1993

Forum Stats:

Groups: 9

Forums: 46

Topics: 11981

Posts: 102867

 

Member Stats:

Guest Posters: 518

Members: 3428

Moderators: 3

Admins: 3

Administrators: Piquet, JMD, Rusty Floater

Moderators: xcgb, Mick W, Stoo63