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DT125R Forum -> CARBS -> Carb compatability???
Post Info TOPIC: Carb compatability???
Derbyian


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Carb compatability???
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As the above.... What Year carbs fit what bikes? Will any dt carb fit any dt? Thanks in advance

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NorDt


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I dont see any reason it wouldnt, The manifold is made out of rubber. So you could basicly fit any carb thats not too big to fit inside the frame :P

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Sold the DT, Bought a WR 426. Sorry guys.
Derbyian


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Nice 1 will start looking then. There is a few 80s dt carbs on eBay. Just don't want loose any performance

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NorDt


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i heard the really old dts got 26 mm carbs though. Dont know if its true.

If you want some more performance then get a bigger carb ?

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Derbyian


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Just looking on eBay now there's a couple of 30mm carbs on

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NorDt


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Yeah i saw another guy here with the stock barrel and a 30 mm carb
Dont know how much difference it makes when its just 2 mm bigger. And you might not want to waste money on a 34mm carb if thats too big for the stock barrel. You should ask around here and find out if anyone knows how big carb is the best for the stock barrel :)

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DT-R_bradders


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i think "the only way" is the carb man here but im pretty sure this subject has been covered many times have a browse thru the threads m8

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Derbyian


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Think if I was to get a carb from a earlier bike it would still perform the same?

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FunkeyMunkeyDavid


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early dtr's (up to 91) and dtlc's had a tm 26 fella. you really want a tm 28 to keep performance the same.... this one's on ebay cheap item no 220956918266

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Derbyian


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Was looking at that just.... Sent him a message. Cheers

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Derbyian


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Found 2 tzr 250 carbs 28mm on eBay that look exactly the same as the dt carb. Think they'll fit?

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Derbyian


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Or to just use the part I need

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NorDt


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Yes as i told you, Ofcourse they will fit. You just press the carb into the manifold and put a air filtre on it. then just apply the throttle cable.

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Sold the DT, Bought a WR 426. Sorry guys.
Derbyian


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Just want to be sure before I buy anything. Thanks again

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NEV


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Sat, does the 4dl CDI plug straight in to the older DTR loom?

Oh and by the way, you haven't got a brembo front brake lever off the Belgarda kicking about anywhere have ya mate? or if not a pic of one so I can get one of Ebay, as theres a few different ones on there.

Cheers Nev

 



-- Edited by NEV on Monday 20th of February 2012 01:02:50 PM

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Derbyian


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Got it sorted £40 and 160 mile round trip I got a carb with cables and throttle from eBay. Not the best condition but made good from other parts.

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satelliteone


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I would get a Dellorto 32mm VHSA, its fitted to the TZR/TDR belgarda`s as standard. If you dremmel the original rubber, they do fit, i have done this my self. The Dellorto`s VHSA carb is jetted for the DTR/TZR engines too. Just an idea really, if you want to move away from the restricted 28mm.

Am currently running a Ramair filter on my 32mm, taking off the orginal restricted airbox, and geting the jetting correct. Same really as the DTR airbox is also a restriction device.

One of my mates is doing his mikuni 28mm on a dtr, jetting for a modded airbox. Current from 240 main to an 290, This is on the Mikuni 28mm SS carb (97 on). not a huge jump in really, as the mikuni jets are small bore jumps to jet numbers. I think 0.2mm increase in jet bore size.The pilot jet was increased too, 17.5 standard to a 20 i think he said. The bike responded extrememly well, loads more grunt. Mid range power is more noticable. It proves that the DTR airbox, must of been a part restriction.

I dont condone any one to mess with their airbox carb jetting, cause if you get it wrong, the engine wont last, you really need to analyse what your doing. A fuel to air mixture meter is needed, and a rolling road. But once set, the power can be a good 28HP, like the Jap 4FL engines. But then again, The DTR CDI is also another weak area, too. You only got to look at the ignition timming graph on a DTR , against a 4DL Cdi. You will see the timming at the top end like 6Degs retarded on a DTR, no wonder they dont rev to 12k.

Anyway,, food for thought.

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DT-R_bradders


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surly if its for a yamaha then a yamaha dealer can get it? lol have you got pics of the trasfere ports on your "P marked barrel n wats the head look like on the inside? iv got a 3mb one here that iv highly polished i was gonna use that, 

i got it shot blasted first looks brand new

 


looking at these it could prob do with a bit more polidhing to get it pure mirror finish
-- Edited by DT-R_bradders on Tuesday 21st of February 2012 01:35:25 AM



-- Edited by DT-R_bradders on Tuesday 21st of February 2012 01:37:44 AM

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satelliteone


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hi nev, ummm... the 4DL cdi will plug into a dtr loom, BUT, it has to be an early loom. 3 wire servo loom. and of course the 3 wire servo too.

if u find an older, say 1990 dtr, rip the head n barrel off it. stick on a 4dl top end. Plug in the 4dl cdi, scrap the 26mm carb for a dellorto 32mm.. and you will have a 33hp dtr. Thats is what i would LOVE to do..:)

as to the lever,



thats the one i have on my brembo master cylinder.Where to find another..mmmmmmm just done a search, can i find one can i heck..lol







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NEV


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Yup tis the same lever Sat, perch is anyroad, again old Ducatis, or poss RS Aprilia ey Bradders, i need the mastercylinder internal rubber now mines broken.

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NorDt


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Im guessing its pretty hard to come by a 4dl cdi + 4dl top and barrel ?

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DT-R_bradders


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NorDt wrote:

Im guessing its pretty hard to come by a 4dl cdi + 4dl top and barrel ?

 yes very hard lol



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satelliteone


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i wouldnt say hard to come by. seen a few cdi`s on egay.. and the barrels.

http://www.ebay.co.uk/itm/YAMAHA-TZR125-4DL-BELGARDA-CDI-ignitor-tzr125rr-/280825442211?pt=UK_Motorcycle_Parts&hash=item4162802fa3


this not a 4dl barrel.

http://global.ebay.com/Yamaha-TZR125-4DL-95-97-Cylinder-Barrel-for-Repair-19729/350524927973/item


the 4dl barrels look the same, but has a "P" mark eg... 3MB00 P 124cm3

I have seen a few on ebay in the past. The head is unmarked, but the same as the 3MB head. piston is the same as the DTR too.

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the only way is YAMAHA DTR


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sat is your top end the one with boost ports and oring seals?



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DT-R_bradders


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do you know the part number for the proper 4dl "p" marked barrel? im gonna find out n see if i can get one from yammy

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the only way is YAMAHA DTR


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spmotor1.jpgwhat barrels this that says yamaha next to the powervalve



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the only way is YAMAHA DTR


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1004900.jpgbiggrin



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satelliteone


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You mean the SP barrel. Thats the 36HP 4DL1 Barrel, with a flat top piston, high compression.

I wish!...lol

The one with the P is the 33HP 4DL is the one i have. Motori Minarelli tuned. Mild ported from the belgarda factory. Just a tuned 3MB00 barrel really.




this is the really rare barrel.









Bradders, Yam UK?..i rekon not..maybe Yam italy tho..

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NEV


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Cheers Sat, but the pivot hole on the lever is smaller than mine, mines about 12mm, cheers though.
Oh btw Bradders came across these on italian ebay

http://www.ebay.it/itm/YAMAHA-DT-R-TZR-125-cilindro-completo-di-valvola-YPVS-/390373281720?pt=Ricambi_e_Accessori_Moto&hash=item5ae40f8fb8

http://www.ebay.it/itm/Yamaha-TZR-125-R-Belgarda-4DL-00-CDI-ECU-TCI-Blackbox-Zund-Box-Steuer-Gerat-/270898694593?pt=Motorrad_Kraftradteile&hash=item3f12d209c1

 

http://www.ebay.it/itm/gebrauchte-Motorblock-Yamaha-TZR-125-Belgarda-4DL-DT-/350519998206?pt=Motorrad_Kraftradteile&hash=item519c9eb6fe

http://www.ebay.it/itm/Kit-pompa-radiale-freno-frizione-brembo-racing-RCS-/120782053006?pt=Ricambi_e_Accessori_Moto&hash=item1c1f2bde8e





-- Edited by NEV on Tuesday 21st of February 2012 10:07:17 AM

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satelliteone


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NEV! found one!

http://www.ebay.co.uk/itm/FRONT-BRAKE-LEVER-YAMAHA-TZR-125-FZR1000-FZR1000R-EXUP-15-/310377246571?pt=UK_Motorcycle_Parts&hash=item4843ecef6b



Braddeeerrrrz.. nice!
The 3MB head looks identical to my head from the 4DL, the 4DL has no markings at all. I think it was a plain cast for Belgarda. I know Motori Minarelli, made the crank cases, cause they have got their name in the cast. This makes me believe that thy also cast the heads too. The PV case has their name cast also






I rekon the 3MB head is the same. SO just use that on top of a 3mb00 P 124cm3 :)

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