DT125R FORUM

Welcome to the DTZr, a love child of....1 bike with parts from other 3 and lot of ....love....parts.

A first year 4BL model,it began it's life somewhere in Germany and then came to Greece in 1996 to a rental shop,after that came to my possession.

Unfortunately most of the pics from early stages are lost,due to data corruption years ago in my HDD.

It's condition now is this

The 3 bikes from where parts used.
TZR 125 2RH gearbox and clutch assembly
TZR 250 3MA wheels,disc brakes,
DT 200R 3ET Forks with air valves,shock absorber,alloy swingarm,headlight,headlight mask,right radiator

love...parts
Athena 170kit
DEP exhaust system
new Mikuni 28 with power jet kit to be fitted
parts in general.....

PS.I was going to buy a DT200R but every one found was raped at best.

The finished DTZr,it's on the road,I am doing some runnin km's and will go to a friends dyno.

Passed technical inspection with "flying colors".
I didn't put the 3ET headlight because it's no good for night,if you want to see and not just others to see you.

PS.I will shorten a little the front fender.

Wheels condition when purchased and finished

Repairing a hard to find DT200R 3ET alloy swing arm,and this considered good condition.

@rraleks Forget what RS125 has,different engine.Even two 125's with same carb settings,same engine but different porting have different behavior,one may be lean and the other too rich.

I would like to add my 2 cent's.I have 3MB and 2RH(=3BN) cylinders,I've measured them off the bike and on the 3BN00 cases from my 4BL bike,and everything is the same,I think on '88 DT's and early TZR the less 0.7mm is on the crankcase side not the cylinder..

It's a little blurry old photo but you see the arrow on top pointing forward and the lubricating hole at the back.

When using lower octane you can always alter your compression,there is an equation to Graham Bell tuning book for that,if I remember correctly.
Speaking for our loving tuned DT's,stock ones won't notice it.

@Glynn123 100% original unopened engine,it was the reason i bought it.Unfortunately don't have a pic from the day of purchase,it could be a highly recommended scrap yard candidate.
I have some old photos from the repair of the plastics,when i make a thread you'll see.

)

Engine when opened some pics for reference.

It's a sad story with good outcome.
You came out with a solid companion in life (the other half),a beacon of light for the path (the DT) and your health don't underestimate this,trust me.
Hope everything will be better for you.

@SpookDog Try 17 front and 51 back sprocket.

@HOTSHOT-III Nice story mate. You did what you wanted and that is the goal.
I would like to ride the RD, it's a 2 stroke dream for me along with the YZ490.

I always try to set goals/dreams and go for them,not for money/power/fame but for the ride and the satisfaction of "yeah done this"

Hello,after a long time,it's a slow project due to some personal matters from time to time.
"Last minute" tuning to crankcases for matching,widening,angles retaining and "little" tuning to Athena cylinder/head (trasnfer port shape and sizes,exhaust port shape,size and timing,combustion chamber volume,compression)

The cracnkcases,before and after cleaning and smoothed/matched/checked inside

TZR 125 2RH gearbox (one model of the old TZR had the same gear ratios with the TZR 125RR Belgarda),that one is fitted.
Had to find some different bearings to install,not same with the DT.

The crank before and after.

Plastics repair.
Plastics where damaged and brush painted with car chassis paint.Grey stuff is putty for plastics.

@GiannisT said in Suzuki dr125sm wheels?:

Okay thanks. Sheesh lots to learn and lots to do! I should probably begin a new thread purely asking for help while rebuilding this thing cause this sure has gone in a different direction than just SM wheels and i sure have a ton more questions. One last thing however, mine is a 1996 4BL bike, I was under the impression this model has one of the better CDIs (?) would the zeeltronic make that much of a difference that it should be moved up in my list of priorities? Thanks again.

Now I saw that you are a fellow countryman.
I'll list from more work to fit to less,by price is up to you there are still a lot stuff to become SM parts at car.gr
TZR125
TZR250 (if you are tuned,little heavier wheels)
TDR125
WRX125
DTX125
I suggest you to stick to Yamaha family if possible.
For example,I used TZR250 3MA wheels,I needed custom spacers front and back,custom front axle,back was used the one from stock DTR, half a centimeter machined from the rear brake bracket to align for the disc and half a centimeter from the sprocket hub to align the sprocket.
1cm thick bracket for the front brake to move for the bigger disc,front brake disc from TZR reverted to align with the brake caliper.

If your CDI says 3NC it's the best stock open CDI you can have,If you are tuned enough next best stock by little is the 4DL,small difference and requires a little wiring mod for everything to work.

@crispy I had exactly the same problem after my full rebuild,it was running fine for a week and then problem starting up,weak spark,then nothing.
I had bad connection between the spark plug cap and the cable.

Where are you guys, there is no sign of life in the forum for about 1 week.
I'm checking it everyday.

A tyre/rim chart I have says up to 80/90-21 is ok,90/90-21 is what I will put when I change tyres.
Don't remember where but someone fitted that size to 1.60-21 rim and had no problem.