2003 Yamaha Dt125R Project

[Walney-Reptiles]

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!!

[Calum]

Looking great!

[NINJA]

@Walney-Reptiles Shiny!!! :thumbs_up_medium-light_skin_tone: :oncoming_fist_medium-light_skin_tone: :thumbs_up_medium-light_skin_tone:

[Walney-Reptiles]

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

[declan]

@Walney-Reptiles it’s so nice!

[NINJA]

@Walney-Reptiles Shiny!!! :thumbs_up_medium-light_skin_tone:

[mhbikesnbits]

Looks very well I like it

[Walney-Reptiles]

@declan @NINJA @mhbikesnbits

Cheers guys! Its been a long time coming, most of the time it took me to rebuild it was waiting for parts from MSP but least i know the engine is 100% good to go, just need to get the rest of the bike going now.

[Calum]

Very smart

[Walney-Reptiles]

Hiya again folks

So i have some good news i have started at a garage as a welder / fabricator repairing rotten sills on vans, cars, buses etc....

My boss is kind enough to let me redo and weld new nuts and other work to all my parts before he sends it all off for powder coating, i have one question regarding the suspention linkage and bushes etc... I dont want to pay £355 for genuine yamah bearings and oil seals etc... so i want to know what size bearings i can get as a replacment instead of the standard roller bearings i wanna use ball bearings instead anyone know what size bearings i will need?

[DTR+NSR]

I managed to get branded roller swingarm bearings for about half the price of Yamaha ones, the bearing code will be on the side of the old bearings if you still have them.

[Walney-Reptiles]

@DTR-NSR i dont have them no more there was nawt left of them anychance you may have old ones laying around to get numbers off?

[declan]

@Walney-Reptiles you need linkage stuff or swing arm stuff?

[Walney-Reptiles]

@declan I need the linkage stuff

[Walney-Reptiles]

Also can someone link me to the upgrade bearings for the headset on the 2002 yamaha dtr?

[Calum]

@Walney-Reptiles There are upgradable bearings?

[Walney-Reptiles]

@Calum well i say that what i mean is you can change the top bearing to taper bearings instead of the standard ring bearing

[Calum]

@Walney-Reptiles Not without changing the the yokes/bearing cup.

I done it cause I fitted USDs. But otherwise, no. Or I'm sure it could be done, but what would be the point?

[DTR+NSR]

@Calum my dt is fitted with tapper bearings top and bottom with out modifications, tapper bearings are able to cope with greater loads so generally last longer.

[Calum]

@DTR-NSR Cool, hit the geezer up! I didn't know it was a thing.

My DT was stolen and ramped. Forks bent, wheels bent, bearings in the head tube was fine. They are robust enough. Obviously Taper has its advantages.