DT125R FORUM

Hello,

I have to change my brake discs soon. I have started to investigate and I thought that it could be useful to someone around here.

YAMAHA FACTORY DATA
FRONT DISC:

• Outside diameter: 298mm
• Inner diameter: 132mm
• Number of holes: x6
• Diameter of holes: 8.5mm
• Position: left side

REAR DISC:

• Outside diameter: 220mm
• Inner diameter: 115mm
• Number of holes: x6
• Diameter of holes: 6.5mm
• Position: right side

Some brands as well as the references of the brake discs.

MARCAS CONOCIDAS

EBC BRAKES:

• FRONT DISC REF: MD6235D
• REAR DISC REF: MD6121D

BREMBO:

• GOLD FRONT DISC REF: 78B40843
• GOLD REAR DISC REF: 68B407M5

NG BRAKES:

FRONT DISC:

• REF: 1727x
• REF: 1727
• REF: 294
• REF: 294G
• REF: 294X
• REF: 294XG

REAR DISC:

• REF: 422x
• REF: 422

TRW:

• FRONT DISC REF: MSW224
• REAR DISC REF: MST346

COMPATIBILITY FRONT BRAKE BIKE LIST (298MM):

MODEL - YEAR - CC
BT BULLDOG 02/06 1100
DT X SUPERMOTARD 05/06 125
FJR 01/02 1300
FZ1 USA 98/05 1000
FZS FAZER / FZS - S FAZER 01/05 1000
SCR / SCR ABS 16/20 950
SR 14/17 400
TDM / TDM ABS / TBM - A 02/14 900
USA MODEL XVS BOLT 13 950
USA MODEL XVS BOLT 13 950 REAR
V-MAX SPL,E,EC,F,FC,G,GC 93/03 1200
VMX - V-MAX 96/06 1200
WR X / WR X SM 09/17 125
XJ6 DIVERSION 98/03 600
XJ6 DIVERSION N 98/03 600
XJ6 DIVERSION N / S 98/03 600
XJR 96/17 1300
XJR C 15/16 1300
XJR RACER 96/97 1300
XJR RACER 99/17 1300
XT R 04/16 660
XT Z / ZA TÉNÉRÉ / ABS 08/16 660
XT Z URBAN EXPLORER 14 660
XV 02/04 1700
XV - A / XVS MIDNIGHT STAR 06/16 1900
XV / XV ABS 13/17 950
XV / XV ABS 13/17 950
XV BOLT R-SPEC ABS 15/20 950
XV BOLT RACER / ABS 14/20 950
XV BOLT RACER / ABS 14/20 950
XV DX VIRAGO / S VIRAGO 95/03 535
XV R ABS 20 950
XV ROADLINER 06 1900
XV SPEED IRON 15/18 950
XV STAR WARRIOR / PC 02/08 1700
XV STRATOLINER 06 1900
XV WILD STAR 99/07 1600
XVS - A MIDNIGHT STAR 09/15 950
XVS / XVS R 13 950
XVS A MIDNIGHT STAR 07/16 1300 FRONT
XVS CASUAL FULL DRESS 14/15 1300
XVS CUSTOM 14/16 1300
XVS DRAG STAR 97 600
XVS DRAG STAR / CLASSIC 97/07 650
XVS DRAG STAR / CLASSIC 99/07 1100
XVS DRAG STAR SILVERADO 97 650
XVS ROYAL STAR 96/07 1300
XVS STRYKER 11→ 1300
XVZ 12TD VENTURE RAYALE 84/85 1200
XVZ 13TF WILD STAR 99 1300
XVZ ROYAL STAR TOUR CLASSIC 96/00 1300
XVZ ROYAL STAR VENTURE 99/04 1300
XVZ TD 85 1200
XVZ VENTURE ROYALE 84/86 1200
XVZ VENTURE ROYALE 84/86 1200
XVZ VENTURE ROYALE 87/07 1200
YARD BUILT RHAPSODY 14/15 1300
YZF R THUNDERACE / R1 96/01 1000
YZF R THUNDERCAT 96/06 600
YZF R1 02/03 1000
YZF-R6 99/02 600

COMPATIBILITY REAR BRAKE BIKE LIST 220MM:
DT 88/07 125
DT R 88/03 125
TDR / TDR JAPANESE 93/04
TDR ITALIAN MODEL 89/99
TDR R 91/93 125
TT 00→ 250
TT R 93/03 250
TT R 98/07 600
TT RE 04/07 600
TT S 93/01 600
WR 89/90 125
WR 90/97 250
WR 91/92 125
WR 92/05 200
WR 93/97 125
WR F 98/00 400
WR Z 92/93 500
YZ 89/93 360
YZ 2T 85/88 250
YZ 2T 86/87 125
YZ 2T 88 125
YZ 2T 89 125
YZ 2T 90/97 125
YZ 2T 92/97 250
YZ 2T / W / RALLY 89/91 250
YZ F 4T 98/00 400
YZ RALLY 90/93 360

@declan That works with everything!

@Stevie-Wonder Thank you, I will investigate on my side. One of the advantages that most interest me with the swingarm change, are the chain tensioners. I don't like OEM ones. I will keep saying.

Today I was able to focus a little more on the bike. Result: I have removed all the electrical part from the headlight to the rear headlight.
I have only been left in the chassis: The YPVS and the wiring that comes out of the ignition case.

I have labeled all electrical cable terminals with their name, origin and destination where it is plugged in.

Have you managed to reassemble the electrical circuit in a more orderly and clean way?

I think I found the cause that sometimes the key didn't make contact:

One year ago, I installed a Trailtech Vapor with indicators and I did not remember the number of cables added.

I have emptied the oil tank, engine coolant, removed the radiator and the coolant hoses.

Tomorrow I will have a better view of the state of the frame. My imagination is running and begins to see colors

@declan Thank You! Although I used it daily for years, I have always tried to take maximum care of it. But the passing of the years do not forgive.

@Calum Do you recommend Koyo?

Apparently there are 3 units of type:
6004-2RD / 20 * 42 * 12
and 2 gaskets TT0-D772-1-TC / 28 * 47 * 7

I found this info thanks to this link

They have sent me the photos of an exploded view. it is from a yz 125 from 1989.

It only seems so to me or the chassis is the same!
At first I was interested in the carburetor. I think that in this model it was a mikuni 35, but there is a photo that has made me very afraid, I let you discover what it is ...

I am very inclined to take his swing arm. I have read that it is adaptable to our DTs. What do you think? Is that so? He leaves it cheap and is "close" to home.
I leave you all the photos that he has sent me in case you see something of interest. Give me your most sincere opinion. In time we are to fill our shelves with useless things

Notice: It seems that what remains of the motorcycle has been unearthed from a site from the Viking age...

You are right. I expected it too but, there are rusts, but nothing too serious. I was able to see especially in the subframe and steering column.

First discovery and thing to point out on the list: rear wheel bearing gaskets:

I tried to rotate the bearings with my finger. It spins, but with difficulty. It is lubricated but not much to my liking

Maybe it's the 35000km that it will have today. more or less. I doubt that the previous owner will change them before. Buy the bike with about 17000.
if so, yamaha, it's a rock!

Hello everyone!

TODAY IS THE DAY!

I start a project with no end date ...
I mean by that I am in no rush to finish this project. I want to take it easy for several reasons:

The first, I have no need to use the bike today (they don't let us either). That if we will see when summer comes, will I regret it? Surely!

Second, I want to do a complete review. I know what restoration projects are like ... I'm going to find good news, but many more bad surprises.
You already know what happens; when you remove a piece in good condition, you get 3 in very bad condition, etc.

The third reason is that I want to improve both the cycle part and the engine. That requires a lot of time for searching, mounting and obviously a lot of money.

I want to leave it as I would like it and since I rolled up my sleeves and stained it, I want to do it right!

Today he began to dismount the wasp. I leave you some photos of how it is right now ...!

Greetings from Spain and give them gas!

@NINJA is the attraction of the dark side...

@Calum Beautiful Bike! I always liked the Planet, it is different from the rest and I think it could be a great base to make CafeRacer style with semi handlebars, delayed controls, single seat ...
Congratulation for your brother!

Thanks friends! I will try to write with this level of English

I've always liked DTs. When I wanted to buy a motorcycle to go to work it is the best compromise between price / reliability in 2 strokes. Another one of my options was the Cagiva Planet 125cc. But the Yam SM style won and not enough money then to buy Ktm Exc or GasGas...

My idea is to start by disassembling, see all those elements that are not normally seen. Bearings, wiring, rust .... Get an idea of ​​the general state. As I check parts to change, I will look for the option that improves driving or performance.
I have seen Dts with forks, shocks and swing arms changed.
For example, a friend sold me the damper and swing arm of a 1989 yz 125. I'm waiting pictures.

Although the bike works very well with a motor and a stock chassis (tested on a kart circuit with good tires), I understand that they can give more power and handling.

Hello!

My name is Adrián and I live in Zaragoza, Spain.

I'm the proud owner of DT125X /2005 since 2013 with whom I am very happy. With her, I have gone to work every day, traveled with friends, outings on twisty roads, circuit runs...lot of fun!

MY WASP ...

ENGINE: Nothing has been done except the Arrow exhaust pipe, the breather pipe and the 15t sprocket.

ESTHETIC: nothing exceptional. It is full black, the only thing that changed is the Ufo Ghibli as a headlight, which personally, I love how it fits.

After these hard years of use and all that it has given me, I think it deserves a little time. Taking advantage of the confinement, I have decided to start the restoration project.

I met this forum by chance, looking for information on the escapes of Romeu Henriques

I hope to learn a lot by reading your lines and share my progress and my adventures.

I hope everybody is fine, without covid19.

Greetings.
Adrian

PS: Say if I am wrong with English. I don't master it at all.