I've been offered a pair of 40mm phm carbs are they good for the tr1

Yes but you need two right types! The new Generation of PHM 40 are very good.
Dont take old and used ones.
S.

Thanks any idea on starting point with jetting

where do you actually buy those nice carbs ? any good tips? And with what intakes do you combine these?

Flomo: Use the search button. Ali compiled all necessary info in a very informative post, but:

* Carbs and jets: Stein Dinse
* Inlet manifolds: Mikuni VM38-200

All the other details (incl. jetting) in Ali's post.  :)

And I agree with Sepp, Dellortos don't fare well with age. The plating on the slides can/will rub off and needles and needle-jets need frequent replacing. That said, two or three spare parts can easily bring your used carb quite close to a new one, where you simply don't have to put up with that kind of bother.

Cheers,
Greg

I've Tryed the search function but got nowhere any chance of a link

Top - Danke ! ;)

tritonkev wrote:

I've Tryed the search function but got nowhere any chance of a link

try tis link
http://www.tr1.de/pages/forum.php?iQuery=num=1353751281/35
Use the english version of:
https://www.stein-dinse.biz/advanced_search_result.php?keywords=300711309&x=0&y=0&categories_id=&inc_subcat=1


friditec wrote:

[quote author=Dan link=1353751281/30#34 date=1395399032]Um's wieder aufzugreifen. ... ich möchte définitif auf einzelne Vergaser umsteigen. Dellorto PHM, PHF oder gar Bing. Vom Fahren und auch vom einstellen wäre denn was der einfachste Weg? :-/

Hallo,
für alle die es interessiert meine Teileliste von Stein-Dinse:
Artikel-Nr.               Bezeichnung                                      Anzahl
300711309             Carb PHM 40 ND1 R.G.Ch Guzzi        2
6413175                 Main jet 6mm 175                             2
8540-265                Carb. Atomiser PHF PHM PHBE AB 265          2
300455101             Inlet trumpet ALU pol. PHM o.
                             Sieb flach 50mm M52x1.25                    2 NOT AVAILABLE
13117541-Z          Throttle cable  Gaszug 850 T3 Cal. bis 79 mit Einst.        2

Hat zusammen etwa 560 gekostet.
Bei den Gaszügen, die zum Gasgriff Magura Modell 305 passen, müssen etwa 15mm vom Aussenzug entfernt werden, damit sie passen.
Dafür wird die Blechhülse mit Kraft vom Aussenzug abgezogen und die Assenzugspirale 15mm mit der Eisensäge gekürzt. Dann das zu entfernende Aussenzugteil (ist eine Spirale) einfach mit 2 Zangen abwickeln und die Blechhülse wieder draufschieben.

[/quote]

tritonkev wrote:

I've been offered a pair of 40mm phm carbs are they good for the tr1

got the dellortos on ive not road tested yet do I need to worry about the chokes or is a couple of twists of the throttle ok it seems to start this way

Twisting the throttle 3 times the whole way and hold it for a second is the way i do it ( to start a cold engine),
just close the chokes so no air or fuel disturbs the mixture,

Thanks Ali I've not touched the chokes at all so do I need to seal anything
Ali wrote:

Twisting the throttle 3 times the whole way and hold it for a second is the way i do it ( to start a cold engine), just close the chokes so no air or fuel disturbs the mixture,

No, just make sure these little choke- sliders are at down position ( by the spring)  and the rubber-seals beneath  are closing everything, sometimes the seals are worn, cost a penny to renew them,
Ali

Thanks Ali they should be fine as they are new carbs  took it out tonight for a little  run seems to go really well and it pulls really  well  its got 165 mains in it now will try 175s as stated on here
Ali wrote:

No, just make sure these little choke- sliders are at down position ( by the spring)  and the rubber-seals beneath  are closing everything, sometimes the seals are worn, cost a penny to renew them, Ali

Took the bike out for a test ride yesterday wow those pumpers really work well still running the 165 main jets at the moment but it seems fine as is

The only thing you'll regret with these carbs is that you didn't do the swap a whole lot earlier.  ;D

You right there
I read on here about uprating the oil pump is it something I need to worry about  and would it be from any post 84 model

Won't do harm. Any post '84 will do. But also XV1100 and XVS1100 will work. Make sure, you don't already have the better pump in there. My '82 model did have one (retro-?)fitted.

Hello I've done enough dew miles now I've checked the plugs and they look very clean I amusing the 17 main jets 60 pilots needles on the lowest notch should I up the ilot jets ?

Do you have a stable idle or does it vary a lot, when the engine warms up? I am running VM38s, as you may know, but I selected the pilots so that once the bike has warmed up a bit (2-3 miles) it will hold a steady idle, which won't speed up even when really hot. Running #20ies on the VM38s whilst sucking air through the frame just to give you a direction.

Hope this helps
Greg