DT125R FORUM

Just thought i would let you guys know that the cylinder kit i ordered arrived this morning heres some photos

I have to say im impressed with the Quality just hope it lasts lol

Project Update!!

Soo i have had to Design a HeadSet Spacer for my new forks to fit, as the new taper bearing for the old forks dosnt fit the steering shaft on my new forks so i have designed this using Onshape, I have Ordered some Alliminium Tube which is 56mmOD 32mmID 12mmWall 200mm in lenth for £15 next thing todo is 3Dprint a Prototype then test fit then get my freind's Lathe going and make one out of the Alliminium

Project Update

My forks arrived today

Please welcome my WR426F forks
They are in decent nick for £150 they have Adjustable Compression Hardness on the bottom and Adjustable Dampening on the top, Bearings seam to be a perfect fit all i got todo is but a spacer under the bottom of the bottom taper bearing

Sorry for bad photos

Well i have had some Post Today

Swingarm bearings and bushes and seals aka service kit

Linkage bearings and bushes and seals aka service kit

Head race Taper bearings top and bottom

well im very happy to say that i have now finished putting my engine back togeather im just wating on a few bits from ethena to finish puting my cylinder head on but the rest is done Heres some photos

So upto now i have replaced with new

Stainless bolts
All Koyo bearings
all Athena Oil seals
All Athena Gaskets
New Athena topend

now i have all the rest of the bike to sort out,let me know what you guys think

Update So i have started to rebuild my Yamaha DTR 125 Engine today

New Bearings Fitted Replaced all of them!
New Athena Oil Seals Fitted!
New Stainless steel allan bolts!
Gear Box Back in one piece

Tomorrow i will be doing the Clutch and Balance shaft and all the gears that connect the Balance shaft and crank shaft together. i will also be putting my new athena barrel on then when the missing spacer washers arrive il put the head on.

Heres some photos of todays progress in order

Didnt need the manual much as this will be the 10th time of rebuilding these engines Super happy that im getting closer to my DTR Dream!!

Welcome to the club!

@theportingmaster said in 2003 Yamaha Dt125R Project:

K38 slow jet

cheers buddy, il be getting a limited edition stainless steel and silencer exhaust from portugal in the next few months, will upload photos when its arrived!

heres some photos all shiney and new

well guys for chrismas i got a PKW 32 keihin carb off my old man Looks mint he said its good for a 125cc upto a tuned 200cc will upload photos later on.

A Big Thanks to @Challenger For Selling me the WR200 Swing arm, Caliper Carrier And Caliper

(This Bike Gunna Be A Beast!!!)

I cant belive how fantastic all this is looking i really hope mine looks as good at this once its done.

Project update !!!

I have just ordered WR426F front forks to fit on my DTR

@liquid-snake Make sure you have bought the correct crank bearings as you can get them slightly too thick (I have made this mistake in the past and my cases wouldnt close due to the bearings being to thick) heres a link to the ones i have used in my engine rebuild

https://www.pjme.co.uk/acatalog/Yamaha_DT125R_Engine_Parts_Bott.html

ebay mate heres the link if its allowed it cost £110 but it beats paying £355 from MSP

https://www.ebay.co.uk/itm/Yamaha-DT-125-R-RE-X-SM-1988-2010-Rear-Suspension-Linkage-Bearing-Service-Kit/273964244490?hash=item3fc98a9e0a:g:Wd4AAOSwJppdUVu3

Well i have made some more orders list below

Head race bearings
Linkage bearings and bushes
Rear swing arm bearings
Frunt wheel and Rear wheel bearings
in total £186.59

Heres a list with everythink i have bought since i started the project back in july including the above..

Athena 125cc cylinderhead kit £429.95
All bearings in engine (SimplyBearings.co.uk) one from pjme £128.09
All bearings on frame and wheels (coming from ebay.co.uk) £186.59
Athena full oilseals (from ebay.co.uk) £33.95
Athena Full gasket set (from ebay.co.uk) £29.99
MSP (replacment bits for inside engine that i lost) £45.48
Sub Total £854.05 SO FAR

I estimate there will be atleast £600-£700 more ontop left to be spent before it is complete

@GoProKid95 Cheers buddy, it will get there it will just take time

An update for the DTR project...

Today i am happy to say i have ordered the new top end last night, this is the one i have ordered.(Has anyone used this kit before?)

https://www.pedparts.co.uk/product/4418/125cc-cylinder-kit-yamaha-dt125r

Paid and its posted should arrive thursday (04/07)

I am now looking at a full bearing and oil seal kit... £143

Well i decided to start the strip down today, gives me somthink todo while i save up.

also i got some bolts to help me with the rebuild M3, M4, M5, M6, M8 i also have some M10 and M12

Heres some photos from today
i started to strip her down and these photos are taken after a go-over with the pressure washer, i will get some more photos tomorrow when i begin round 2 of the strip down.

Hey yall

Well iv owned this Dtr for 8-9years when i got it. It needed alot of work i got it back on the road and used it for green laning up the lakedistrict also for getting out on, after loosing my job i had to take it off the road..

So im going to start getting my dtr back on the road, its been sat in the back garden for 3+years uncovered.
i managed to get it to start last month and that got me thinking about getting it back on the road as you can imagine there is alot todo il post some photos below of its current state...

Im going to rebuild the engine once again with a new top end, new crank bearings and a new Carb new exhaust and all the cosmetics and brakes etc... but i want to convert it into a Supermoto style il upload photos along the way

(Dose anyone know any 2-Stroke tuners for when i have rebuilt the engine so i can get it running sweet as a nut?)