DT125R Detailed OEM Engine Rebuild SACHS ZX125, KTM LC2, DERBI GPR 125, YAMAHA TZR 125
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- čas přidán 3. 01. 2020
- Detailed engine rebuild following OEM parameters.
The cylinder was bored at PJME ENGINEERS and the crankshaft was overhauled.
This video is suitable for OEM DT125R as well as for a SACHS ZX125, KTM LC2, DERBI GPR 125 and YAMAHA TZR 125. - Auta a dopravní prostředky
![DT 125 RE/X DERESTRICTING GUIDE [15 TO 25 HP] - PowerValve and Exhaust](http://i.ytimg.com/vi/tOZeaJnFcjs/mqdefault.jpg)
@8:56 put a penny in between the 2 cogs to tighten the nut then there's no strain on the conrod bearing👍
Thanks for the tip 👌🏻
Yeah, that was crazy 🤪
@@JLMotorsport both not very good. If you put something between two gears, it will ALWAYS bent the shaft. So your crank bent. You have to block the gear itself. First tighten the balance-shaft gear with a tool to hold gear like something for block clutch hub or leather-belt holder. Then tighten the crank bolt with a tool, that goes into the holes from the balance-shaft gear. That's my method. Do this and your crank+bearings will last longer.
You must be out ov them penny's be now m8 🤣
Great job bro!
Bravissimo,bel video!
Bom trabalho Joel!
Mota HC valeu!
Great video
JUSTTRYANDSTOPIT Thanks 🚀
Wow you risked splitting the cases again, no rag stuffed in next to the crank ,to stop the clip falling down
He’s a pro no need mate
@@Tizzypj Always use good pliers and never let them slip ;)
The way you instaled crankshaft bearing into cases with hammer is mistake. Case shoudl be warmed up and bearing would fall inside without any force. K2 sealant is poor quality and you spread it with fingers. That makes it non sticky.
Worst is the extension in the rod to tighten the nut..
Hola buenas excelente trabajo y de gran ayuda, me podrías pasar el enlace de todas las piezas que tuviste que comprar, como kit completo de juntas,kit bomba agua.... Etc...Justo ahora voy a tener que hacer lo mismo, gracias
You should lube the inner rubber seal on the crankshaft? Am I wrong.
Why did you don't put the termostat
Amazing video, mind me asking why did you put the first parts in the freezer and where did buy the parts from?
Thanks, freezing parts, its part of a shrink process.
¿Alguien sabe porque en el minuto 21:38 le coloca dos juntas tóricas a la válvula si solo lleva una ?
My guyyyyy
Ustam bunun krank kolu ölçüleri nedir acaba...
Hello, I have a DTR 125 and I can't find the throttle cable assembly witch has the oil mixer ajuster, can you show me the OEM numbers so i can find it? Thanks
We have overhauled the same engine for a KTM LC2 125. What oil do you use and what is the oil / fuel ratio? We threw the oil feeder away because it was damaged. Nice work, only this red silicone as someone wrote earlier, we use Reinz.
Hi Kensy, we usually use in OEM engines "Castrol Power 1 Racing" @2,5%.
If the engine is tuned we normaly use "Castrol A747" @4-5%
Great bro is it liquid cool
yes it is
Hey i own a ktm lc 2 125 and the motor is like a twin to yours.where can i find that oil seal set?greetings from Greece!!!excellent job!!!
gabrielknight206 try to look for dt125r they should be the same
just need a dep pipe now lad!
We make our own exhaust systems, gonna upload a new video this week about it 💯🚀
Thats a TZR piston though, its different size in crown height + dome shape and this one seems to be a taiwanese 40-50$ piston because a DTR ProX has an extra 5mm hole exhaust side AND the intake skirt is square shaped :)
There are some slots under the piston pin too in a ProX for added lubrication.
You could use a DT then TZR piston after each other to preserve the cylinder bore for example STD tzr is 56,40mm but dt stock is 56,00mm.
For example 56.25(DT)->56,40(TZR)->56.50(DT)->56,65(TZR) etc ;) Those taiwanese pistons are alot heavier than genuine ProX pistons aswell. I get alot more vibration with them.
Edit: *You placed the second o-ring for ypvs valve in the wrong spot and forgot to install it on the endcap at **22:24* :)
What's the purpose of the little hole on the piston ? Isn't it better without the hole ?
@@yann5427 If you mean the 5-6mm size hole its for extra cooling and might be some low end torque boost port aswell. The small holes that a tzr piston has at exhaust port sides are for extra lubrication :)
@@yann5427feed's oil to the little end & port bridge
Were the clutch plates submerged in oil before installation or did they go in dry?
Always in oil bath before installation- if possible for a few hours.
hi, I need help . In my yamaha dt 125 x motorcycle, the coolant liquid has been introduced into the transmission and mixed. What joint is broken? What can be?
Waterpump Seal
Does OEM mean all original Yamaha parts that originally come with it? I want to rebuild my own engine and i am wondering if it is the original parts...
Yes, same specs as standard parts.
Onde posso arranjar um suporte de motor igual?
Bom video😃
Este foi fabricado por nós com flat bar de aço.
Okok obgd
Dt best bick 2 stork yamaha👍
Super construction, only the silicone is a pig.
I know, later on Had strip it apart due massive leaks from that silicone 🤣
Boas consegue dizer o torque de aperto dos componentes do motor ?
É so procurar no google "metric torque chart"
Ou entao o manual utilizado neste video, por 10-15€ vale apena.
hey, what is that little hole on top of the engine top, next to the stud? is it for coolant?
sorry, Can you add the video minute here?
JL motor sport you still have this dt125r m8 & what was the outcome on these crank seals did they seem to hold up ok or any issues with them bro ?
No problems at all 👌🏻
no problems at all 👌🏻
@@JLMotorsport ok m8 thanks for your reply
Do you still remember where did you get all the bearings? Im trying to find all bearings for my dt 125 engine but only found the models for the crank bearings. I would need to replace all the transmission bearings too.
they all are generic bearings, if you strip them apart you will find the reference written on them.
@@JLMotorsport Thank you
Ola Joel gustei imenso do vídeo, quero trocar o pistón a Michael dt re que conselho me podes dar, tenho k sacar o motor verdad, sou aficçionado a mecánica, um saludo
Geralmente aos 30mil km o motor precisa de levar biela nova, rolamentos de cambota, piston novo e retificaçao acima.
Why did you put some parts in the freezer? Good video BTW 👍
To Shrink the crankshaft so could easy fit into the (previously heated) bearings.
Thanks 👌🏻
@@JLMotorsport does it work without crank puller if heated properly?
@@LHRPerf This is only to fit the crankshaft to the main bearing, if you want to disassemble the crankshaft to the bearing, you have to use a crankshaft puller or a press.
@@JLMotorsport yeah bute can i also fit the crankshaft into the main bearing without puller?
@@LHRPerf yeah easy.
Is it normal that the crankshaft does not turn too easily after assembly?
Yes it is normal when you fit new engine seals, it should get free after 2-3 heating cycles.
@@JLMotorsport ok bro good to know
Think you missed something
You removed the thermostat?
Some countries in europe Yamaha do not fit Thermostat.
It s the same engine for all bike from description?
Yeah
@@JLMotorsport a want to buy a Sachs with this engine, some opinions?
@@dascaluradu-ionel1788 exacly the same engine, diferent covers
Which manual book do you use?
Haynes
hi mate! iv got a 97 dt125r and its recently developed a crack in the engine case and i want to try to fix it because i really dont want to sell the bike. the engine thats in the bike atm is a 4BL and i was wondering if its possible to switch all the engine components into a LC2 or a 3BN engine case? thanks in advance
Yes, thats compatible.
@@JLMotorsport thanks mate appreciate the response 👌
What brand is that crankshaft?
FlexiFuel OEM.
How much Ho did you get out of it and where did you get the parts to
Hp
HeLP!!!!!Добрый день ,подскажите стоит цилиндр 4FU00, могу ли я его заменить на 3MB00
+pistone
My clutch basket has 4 spring holes not 5 it's a 91 tzr? Any ideas why?
TheMurphy331 tzr engine is different, it has only 4 clutch springs.
@@JLMotorsport ah thanks for the reply mate I thought the dtr and the tzr were identical engines!
Mine has alot of play on the clutch casing so need to replace it :( also got loads of engine vibration to the handlebars which makes it unridable so that's why I initially stripped it down and noticed this. Hoping it will fix the vibrations
TheMurphy331 sometimes vibration its due to a bad crank truing. just check your crank shafts.
@@JLMotorsport checked it mate. I've got the head off now and crank seems perfect 🤷♂️
TheMurphy331 max +-0,05mm clearance.
Hi, what's the name of the book of the Specification of the piston ring gap?
Hi Antonio, its called "Haynes"
When you buy wossner piston they give you the specification. It's something like diameter of the bore x0.004mm for the top ring and x0.005mm for the bottom. This gave me a ring gap of 22.8mm for the top ring and 28.5 for the bottom one. Haynes gives a much greater range though.
This was because I had an over bored cylinder of 57mm
Bro were can can i get yamaha wr200 oem spares online...
Fowlers Parts | Genuine Motorcycle Parts & Spareswww.fowlersparts.co.uk
Try this guys.
At 30:50 What is that part that Spins called? And How do you wire that part?
Do you mean the power valve? (YPVS)
It’s just a servo connected to the cables shown
Better use something like Dirko or Victor Reinz than that K2 silicon ;D
sparkplug what model is?
We using 105 NGK
Why is one Clutchpad smaler than the other seven, i am rebuilding my engine and im wondering why one clutchpad is smaller, at 10:59 you can see it :)
its to fit the clutch "non-stick" spring between them.
Trank you, but you dont use this spring in your Video am i right?
@@burk.florian in fact I didnt fit it, but then needed to go back and add it in place, missed it when was shooting.
Alright thank you Mate :)
@@burk.florian You're welcome. 👌
bro, i"m 15, i bought derbi gpr 125 2t but im scammed, this engine don"t working, I don"t know how to fix it, I think the crankshaft, cylinder and pistons is broken but i don"t know how to fix it
Hi bro, this video will guide you through your rebuild, its part of the learning process, people have to start somewhere init?
19:21
I don't understand why you put this segment or ring, supposedly it's not just for a 4-stroke engine? 19:21
Hi, thats just to pre load (spring) the bottom ring, some piston brands use them to add a bit more longevity in their pistons.
Does anyone know if it is the same engine on an Yamaha TDR 125 from 1996?
Exactly the same.
@@JLMotorsport Super! Thanks for the quick response.
@@JLMotorsport hi
I have a 125 r dt from 96 and i need some help, what is the torque spec for the crankshaft nut and the clutch basket nut?
@@Bdp13 about 50-55N.m
@@JLMotorsport thank you
which bolts you are used?
Hi always use Cap head stainless bolts in my builds.
@@JLMotorsport ok bro, thanks
@@zile6057 Good luck with that bro 👌🏻
Hi how much nm did you use at 9:00 And 10:45. Thanks
45N.m
If you think its ok to get work from pjme, you think it ok to hammer bearings. Its not right or wrong, just different standards
Hello.Can you tell me where you buy water pump kit and how much costs
from yamaha, costs about 30£
@@JLMotorsport please can you find this kit and copy link here i cant find
@@biilsonbandzonovic3201 www.fowlersparts.co.uk/parts/4171889/dt125r-3rmm-2002-050-a/water-pump
Didn't lube the rings at all used after market gaskets n seals can't of lasted long haha
May I know this specs? ✌️
Its a Full OEM DT125R Engine 2002
✌️
👍👍👏👏👏👏👏👏😂
what is the name and where i can buy the manual what you use at 19:42?
Haynes
@@JLMotorsport but my original haynes manual isn't like your manual
@@marcomx9580 maybe this is a newer edition.
@@JLMotorsport can you link it me?
@@marcomx9580 www.ebay.co.uk/itm/113315188378
How Old is the engine?
This particularly one is from 2003, but they are basically the same since 1988.
I Got a dt 125 lc from 85, do you know How to get more hp out the engine?
Maybe a new cylinder and carb?
@@Jensenjens32123 Bigger carburetor and a nice exhaust system could help you. Check our instagram page, we build a mk1 dt 125 lc 2 years ago. @jl.motorsport.uk
Achtung!!
Er hat vergessen zu zeigen das Schaltgestänge rein zu tun!
Fährst du zufällig dt?
@@2strokesumo229 ehm ja
putting all that stress on the con rod when tightening the cog nut was not correct, use a penny , softer metal than the cog and jam it up with that , the force you just put through that thing is deffo not helping anything