the valve not closing check your valve clearance very easy to do and a very common issue

THANK YOU for filming this engine disassembly because i will do some work on my ybr 125 witch have the same engine. i like to know how it locks before i work on it in my garage witch is at 5-*c :(

Had this on my son's YBR - got harder to start over time and lost power - eventually wouldn't start. Tappet had tightened so much it and kept the exhaust valve open. Check tappet clearance before stripping - especially Chinese YBR clones. .

Thank you very much, i did not know how to disassemble engine, before i watched this video

Hey how wud you takeout the camshalf without any special tools

having the right tools makes all the difference

Nice video Can u guide how can I increase pickup of my YB125Z

What spark plug is used for this ?

Hi sir.. i just wacth this video.. maybe you can help me in my problem in my yamaha stx 125.. we already done a lot of maintenance on it.. it also turn to be rebore.. but still the issue is there.. we clean it up everything but still the same.. the problm in it is everytime its running there is time the engine get off.. almost no power on it.. almost always dies and we dont know the real issue.. may be you can help me sir.. thank you..

hey quick question, what would a compleat engine cost me? like carb dont car for exhaust. but ill need the cdi and wireing. im gonna try to make a go-cart with a dirtbike or quad engine. i want a 4 or 5 speed one to.

Thank you it's helpful for my Yamaha Enticer

How much do you want for the engine if you haven't already sold it

Pneumatic drills are awesome

Do you have to mark the cam gear chain before you pull the head?

2004 was the first electric start ttr125

Take out your spark plug that's why yhe one top bolts hard to take out 🤦‍♂️

I think it's a 2005 or up because below that it's all kick start

Look like yamaha stx head and block.the engine came from crypton r

Harbor Freight timing chain tools.

Amigo no podés ser tan manco tenés que sacar el tensor de la cadena de distribución antes de sacar el piñón de la leva

first mistake was buying a ttr