Seller Said This Dirt Bike Lost All Compression

I buy a 2001 Yamaha yz125 dirt bike that lost all compression. Can we fix it? #Yamaha, #Fix, #DirtBike,

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The following video features activities performed in controlled environments by knowledgeable persons. DO NOT attempt to duplicate, re-create, or perform the same or similar activities at home, as personal injury or property damage may result. 2vintage( Joe Weber, the persons shown in this video and ANY CONTRIBUTOR, ARE NOT LIABLE FOR ANY such injury or damage. ALL 2vintage( Joe Weber) CONTENT IS FOR ENTERTAINMENT PURPOSES ONLY.

[paulmopar]

Studded Tires=Ice Racing, Rust and Water=Broke thru the Ice.

[jamiebouchard]

Definitely clogged up exhaust, most likely the silencer. Barely any smoke was coming out the tailpipe.

[Hammerback]

I really enjoy this channel, Ive learned a lot! Thank you for taking the time to record and explain what youre doing and why. ❤

[danielthomas]

That poor bikes had a hard life! That crank was filthy. Needs full rebuild IMO. Also a new cylinder head that weld doesn’t fill me with confidence. As others have said the pipe looks blocked. My biggest concern would be those frame rails though 🙈 good luck joe great content as usual

[TroyRosenbaugh]

Was it sunk in a lake, ridden on salted roads?? 😅 what a mess but your killing it Joe, like always, Vinny's there to keep you chill!!!

[Jeffrose_]

Joe, It looked like exhaust was coming out everywhere except the tail pipe. I think the guy did a triple back flip into a lake 😮😢

[bevis]

If you replace the side cover gasket you might as well replace the Water pump impeller shaft and bearings and seals. If the bearings are worn even a little bit the impeller shaft and seals will both be worn. Problem is that the seals end up wearing grooves in the shaft because the bearings are worn. I just rebuilt a 96 RM 125 a few months ago that someone had "Rebuilt" and it overheated because all of the coolant ended up in the oil. Luckily it did not hurt the bottom end but I did have to get the cylinder bored .005 over to clean it up.

[jameshodge]

There is one part of that carb common problem. There is a gasket you didnt change goes bad. Its under the 2 torque screws . Look up JDMK05 kit and how to install. Jd jettings also has jet/needle kits for these bikes.
I enjoy your videos and always learn something. Thank you for making them.

[yasnz]

A set of ratchet spanners would make your life so much easier, great content as always.

[paulgardner]

It looks like your pipe/silencer is partially clogged. Look at how little comes out of the silencer when you rev it.

[theonlydriver]

Pipe might be blocked joe. Awesome vid. That 125 needs some love unfortunately

[Pittsburgh-]

Like others have said, you had more smoke coming from the engine than out the exhaust. It may be clogged or have water in it. I'm thinking this bike was sunk or was exposed to salt water somehow because of the rust and corrosion

[itarry]

Whilst I'm always impressed by your knowledge and ability it does annoy me that you're perfectly happy to do a half assed job just to get it running. That engine had obviously been full of water, the coolant leak, etc. You just Breeze past these issues just to fire it up even though there's a fair chance you're doing more damage even if it's minor. What's wrong with doing it right first time occasionally? On a bike like this it's not really an issue accept it's a Yamaha but on some stuff you do it can be really annoying. OCD I guess.

[strokemxclassics]

Check the barrell were it's been welded, somethings up cos the full stud came out they need torqued in and loctite b4 u torque head nuts, if the skirt inside is damaged or cracked were weld the coolant will be going down the cylinder coolant grooves but might be cracked inside at the front letting coolant into the bore

[Samalyzer]

So all you need is a new engine and frame to hang the adequate suspension and plastics on and you'd have a pretty good bike. I admire your optimism.

[thebigguy]

From my untrained eye, looks like a great bike. Always a teaching moment. Keep up the hard work

[dennis]

Joe, my man. You have officially become a hoarder :)

[jamesjanzen]

If it had studded tires at one point it was probably ice raised. and probably was at the bottom of the lake at one point

[stubones]

A long time ago a neighbour owned a Yamaha IT 175. It had no compression. You could “kick” start it by hand easily, but it ran beautifully and pulled hard. Never saw the like again. 🤷 by contrast our Suzuki 185 was very hard to kickstart.

[rogerb]

Looks like it went down with the Titanic....wow. With the frame rust and other issues, hope it was cheap. It doesn't look worth the money or effect but awesome video content. Great Channel content bud.