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wigglez256 Added a reply to Yz125 power valve issues??
5/19/2020 9:34am Still runs good down low
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wigglez256 Added a reply to Yz125 power valve issues??
5/19/2020 9:33am Haha yes I deff mixed the gas
wigglez256 Added a reply to Yz125 power valve issues??
5/18/2020 2:23pm The piston is 0.0020 or something. He said he went to 30 to make up for the expansion
wigglez256 Added a reply to Yz125 power valve issues??
5/18/2020 7:56am Just called my friend who did it he said it had a steel sleeve
wigglez256 Added a reply to Yz125 power valve issues??
5/18/2020 7:54am When I first got the jug back and installed the top end it ran great and didn't seem to get hot at all really. It ripped but sputtered a bit on the top and when I took the powervalve cover off the left side pin had broken off . It didn't seem hot until I installed the new valves...
wigglez256 Started a new thread Yz125 power valve issues??
5/17/2020 5:39pm Quick rundown on what has led up to this point .. The bike is a 2000 yz125 I've had it for roughly 2 years and so far it has been temperamental to say the least . So I had a wiesco 55mm piston kit laying around and out of curiosity I had my jug bored out slightly to accommodate it...
This forum thread has 8 replies.
wigglez256 Added a reply to Yz125 kinda runs but not really/no power/ hard to start PLEASE HELP !!
2/25/2020 11:16am Update #2 ended up welding the pins in since I had a welder handy powervalve now works like a charm! Now I have another problem as the carb is leaking but it's not leaking out of the bowl overflow it's leaking out of the little vent hose where the reeds go. I don't want to flood my case even though...
FWYT Liked a reply to forum topic Yz125 kinda runs but not really/no power/ hard to start PLEASE HELP !!
2/25/2020 11:13am
Ha! I guessed right! 
Anyway, yeah, they are kind of notorious for doing that. Mine did the same thing. (Well, actually my nephew's bike that I am currently refreshing for him like a good uncle.) What I did was take the pins to the local Ace hardware and matched them up with some roll pins. Found a size that was just a hair tight and could be pressed in with a vice. Presto, cheap-o, fix-o.
Anyway, yeah, they are kind of notorious for doing that. Mine did the same thing. (Well, actually my nephew's bike that I am currently refreshing for him like a good uncle.) What I did was take the pins to the local Ace hardware and matched them up with some roll pins. Found a size that was just a hair tight and could be pressed in with a vice. Presto, cheap-o, fix-o.
This forum topic has 10 replies.
wigglez256 Added a reply to Yz125 kinda runs but not really/no power/ hard to start PLEASE HELP !!
2/16/2020 7:06pm Update: Finally got around to taking the jug off and tore into the powervalve. I think I located the culprit! The pins on the exhaust valves had fallen out and we're just chilling. I cleaned everything out and went to put the pins in and noticed one side is easy to slide the pin in where as the other side...
FWYT Liked a reply to forum topic Yz125 kinda runs but not really/no power/ hard to start PLEASE HELP !!
2/11/2020 12:44pm
Well, one thing you can check super easy is the power valves. Pop that cover off. Those pins that are in the valves are notorious for falling out rendering the power valves no-worky. At least take a look. If not that, follow Paw Paw's advice.
This forum topic has 10 replies.
wigglez256 Added a reply to Yz125 kinda runs but not really/no power/ hard to start PLEASE HELP !!
2/11/2020 10:17am Yes by hand multiple times every jet my idle screw air fuel screw etc. It's a mikuni carb very simple to clean and remove jets
wigglez256 Added a reply to Yz125 kinda runs but not really/no power/ hard to start PLEASE HELP !!
2/9/2020 9:25pm I cleaned each one by blasting carb cleaner down them then shot them with air. I repeated this probably 6 times over the past 2 days
Paw Paw 271 Liked a reply to forum topic Yz125 kinda runs but not really/no power/ hard to start PLEASE HELP !!
2/9/2020 4:23pm
If the bike flooded with fuel from the float setting being too high, then your crank cavity is full of non burnt fuel. It will have to be cleaned out before it will run correctly. You said a few weeks.... How long exactly? Your fuel could have separated and is now bad. Paw Paw
This forum topic has 10 replies.
wigglez256 Added a reply to Yz125 kinda runs but not really/no power/ hard to start PLEASE HELP !!
2/9/2020 4:23pm I replaced the top end and cleaned/maintnenced the power valve about 3-4 weeks ago it has maybe 8 hours on it of flawless ride time. I ride it daily weather permitting so it doesn't sit with a tank of gas in it too long by any means I put gas in it maybe 2 days ago. It's been running really...
wigglez256 Started a new thread Yz125 kinda runs but not really/no power/ hard to start PLEASE HELP !!
2/9/2020 1:46pm I have a 2000 yz125 I could use some help with! Now I replaced the top end a few weeks ago. Rode it a little bit here and there and didn't have a problem. A couple days ago I go to go for a ride and try to kick it and nothing. I pulled my plug and it was a...
This forum thread has 10 replies.