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It may never be known,- but this is getting interesting as to approaching the OPs question I think. Jackson,- you do mean that all of the LMIII`s carbs were B types, and not that all of the early (I+!!+!!!) LeMans carbs were,- right ? If so, you are also saying that not all of the LMIIIs came with lean burn carbs ?I have some Dellorto manuals, but reading them only adds to the confusion,- Manual nr. 19 even states the LMIII `82 came with PHM40 Ds !!As I`m sure most of you already have figured out, I don`t come here in any "expert capacity",- and I`m happy to be corrected and learn something new in addition to all the other useful and interesting things I`ve learned here.But I must admit, conceding that not all of the PHF 36 B type carbs came shrouded from the factory, is some sort of a camel to swallow.And it immediately opens up the next question : what does the B stand for then ? What makes it differ from the D type ? And is it likely that a significant mod as the shroud would not earn some kind of marking on the carb? Hmm,-So I`m thinking that these obviously "unshrouded values" shown for the LMIII may indicate that there were a few early LMIIIs that came with non lean burn carbs ? And that slepnys carbs are, or very well could be, the original ones?Also, it`s not ver likely that people swop their 36 carbs for another pair of 36s ? Nor that they would change the shrouds ?
Interesting the printed specifications for the Italian motor. Different to the English language user manual. I purchased a LM III new at the factory in 83. It still runs its standard jetting.
(Sigh.)A common mistake made by people who think they are cleverer than they are is to suggest that because they have never seen something it doesn't exist.Pete
All I know is that EVERY MkIII I have ever dealt with that hadn't been buggerised about with had the carbs with shrouds in. Pete
I can't help but chuckle a bit whenever certain words are used in discussing them - words my wife and I try not to use between us if at all possible; always, never, every, none or their synonyms.
Now here is a sentence I thought I'd never put together: I agree with both Martin and Pete! :BEER:
The 83 has small 90 degree elbows coming out the side then bending upwards. They look and feel alloy but they may be very hard plastic. I don't want to do the destruction test. I want to be very clear that they both have the shroud.
My understanding on the PHF B is that the B means flexible mount like the rubber manifolds. A refers to the clamp on type like VHB's on an old roundy. D? I haven't a clue unless it follows the A or B which means it is a RH carb.
You can buy them by the dozen at Dellorto.uk, and they`re not plastic. http://www.dellorto.co.uk/merchandise/products_details.asp?PartNo=9008&CategoryID=2&PartsectionID=21Just to document my assertion earlier in this thread about PHF36 Bs and PHF36 Ds sharing the same body casting :http://www.gutsibits.co.uk/pr/TheShop/index.php?f=e&Shnew=1&Model=7&ModelName=Le%20Mans%201,%20Le%20Mans%202,%20Le%20Mans%203,%20Le%20Mans%201000,%201000S&Cat=FUA&CatName=Fuel%20and%20Carburettors&Sort=TitleDesc&spPage=2#topbarI guess (but not sure) that the "1" suffix on these D carbs stands for the newer type with the revised slides (redesigned idle adjuster ramp) and bigger float bowl plugs.
And is it likely that a significant mod as the shroud would not earn some kind of marking on the carb? Hmm,-
jacksonracingcomau,So You think that Italian manual can be true, no errors and some LMIII where jetted like it is written in this manual? :)
Equally possible they also had different sets of jets in home market, that picture shows breather vents that are not on your carbs, so not identical to yours anyway. German book and jetting shows 3 different sets.
Both right... I'm just more right. ;)
If your mind is set up to live in a chaotic world where certainty is a rare and dubious guest,- this thread is very interesting and informative for us Tonti 850 LM owners. Just to add to the overwhelming variety of carb specs for the LMIII shown here already, I just found this chart covering all the Tonti and later carbed Guzzis ;http://www.thepembleton.org.uk/techpages/dellorto/dellorto_specifications.pdfInteresting how the specs on slides (50/3 versus 60/3) differ in the LMIII specs shown in this thread, and also that the USA LMIII came with PHF36 DD + DS according to this chart, and that they look like lean burn jettings.So there may even be a shrouded PHF36 D ? Confusion complete ! ;D
Sit Spot , stay , good boy ;DDusty
Yep, I'm picking up a bit of angst and competitiveness now too. There appears to be some sort of quest to find the Holy PHF D's and I found them first! ::)Many of you don't know Martin but he has been working on Guzzis since before I could comb my penis. :D I'd like to thank him as he has presented a few pieces of material that I wasn't aware of. Thanks to Kidneb for pointing out the D's. Funnily I now realise that I have worked on them before.Ok, now to the PHF D's. I had a look at the bikes I have stored here and low and behold there is an 89 Cali 3 with PHF 30D's. There is absolutely no tuning, I say again tuning, difference to the B's. The jetting would be identical if the shroud system in identical. The 30D's on the Cali have the standard brass ring around the needle aperture and the jetting is consistent with that, 475cc bore cylinder capacity and 30mm chokes. This is why I never noticed the D except for the (D)amn big nut holding on the float bowl.Why? I can only guess they wanted a bigger reservoir of fuel around the main jet. Not sure why as I've never had an issue with the B's. Maybe being the lowest point in the bowl it allowed more crap to form before affecting things but there is one real advantage that I can see. The Bs had a 14mm AF nut for the bowl. The Ds have a 21mm AF nut. The standard 22mm ring that comes with the standard tool kit for all the oil fillers also fits the D drain. ;-T I can't think of one other 14mm AF nut or bolt on a LM III. I have a friend with a LM IV and that has the 21mm float nut too. I've never bothered to read the side of his carbs but when working on it the nut is a bigun. Clearly the D's came later but the PHM's had the bigger nut earlier. Maybe they just consolidated the design.No answers but I just see this as trying to get your head into the Italian way. I'm not even sure that using my logic to try and get sense out of this is the way to go. I just enjoy working my head through an issue. I may never get to the truth but I will reach a better understanding.Rod in Oz.
No cigar Rod, we knew about them, sorryIt's the 36mm PHF D's you've got to find, OE on some Le Mans (with bell cranks). Not sure why we care but I'm now believing they existed.I think your correct about nut size consolidation, D's in my book have 14mm nuts same as B'sProbably just 21mm on later models,book shows no vent spigots /shrouds on early D.
I think I've gotten to a point that I don't care at all but I'll throw in these last pieces of information/theory.The D's clearly came out after the B's. Even Kidnebs photo shows that later anodised look, they aren't listed in the early Dellorto tuning Guide as the Bs are and D comes after B in the alphabet. :BEER:If you want to find PHF 36Ds then I'd be looking for the Guzzi mid valve models that came after the Lemans 850 series to find them. They came with PHF 36s. Late Cali III's, last series 1000S's (not imported to Oz I've read) and maybe some of the Stradas and Milles. Not sure but maybe Cali 1100 carb. I'd bet Dusty's last dollar thats where they will be. No cigar? that's OK, I don't smoke. :BEER:
Relax Dusty, you aren't destitute yet. :DMy Dellorto Tuning Guide referring to PHFs show just the A and B. I can scan it but it won't post to my image folder. Glad your book shows the D but as I stated it isn't in my manual.I'm not stating that your Dellorto manual may have inaccuracies but as far as I know the Lavs used the A type as they use the rigid clamp on style.If you are wondering, that's my hand and my bike. Please note that there simply isn't the room to fit a B (flexible coupling) type in there between the head and filter box.Many of them came OEM with 32's not 36's. http://www.motorcyclespecs.co.za/model/Laverda/laverda_1000_jota%2076.htmI'm not specifically a Guzzi guy but I do stick with Italians and I'll stick with my original statement that if you find a mid valved 1000 Guzzi from around 1990 I am pretty confident you will be in PHF 36D country.This is one of those Italian moments, me thinks. :BEER:Spend that dollar quickly Dusty before he pulls out a Dellorto manual printed on papyrus reeds and written in Latin. :D
No cigar Rod, we knew about them, sorryIt's the 36mm PHF D's you've got to find, OE on some Le Mans (with bell cranks). Not sure why we care but I'm now believing they existed.
This is your quote Martin.Read it carefully. :DAccording to you only 36's matter so I don't care how many 32s you throw at me they aren't relevant. The PHF 30Ds , in the flesh, I mentioned didn't impress you at all so your 2 dimensional black and white 32's leave me less than tepid. In fact I'm almost insulted you tried such a flimsy trick on me! :DYou tried to flim-flam me with Laverdas but little did you know that i have a very mediocre knowledge and experience of them. :D :D :D :BEER: I hope you have a grin on your face because I have. I find all this 'trying to quantify Italian logic' hilarious. :BEER:Rod who thinks we really have gotten as far as we can expect to on this. Like LM I frame numbers, no one at the factory cared enough at the time to keep records that had no relevance to sales or production. Just my opinion and it is getting time for a beer. I think Dusty's dollar is safe for now. :BEER:As I cracked my first cold and frosty I thought I would ring the Prez of CLQ (Club Laverda Queensland) as he has been into Lavs for many more years and back to when they were still in production. He can't recall a triple that uses the side pull (belltop) set up. His only question was 'How the f*ck would you route the cables?'Rod in Oz.
just to clarify Here's the early D type, date of print on bottom of page, spot the difference to B type anyone
just to clarify 36 D's are in my early Dell Orto book, with bell crank, pre anodised era, no vents or shrouds , 14mm nut