awesome video i just got the 22' yz125 first ever dirt bike grew up on atvs.. awesome bike almost to 20 hours! i plan on rebuilding at 30-35 hours mainly trail riding and wide open streets thanks for the info!
Congrats on the 2018! I would do the piston as soon as you can. Its not the compression, its more about the piston. Old pistons especially stock cast pistons can break after so many hours. If it was a forged piston like wiseco I would say your safe. But most likely its a stock piston which is cast and not really that strong.
@@UpAllNight91 yeah bikes all stock besides full fmf I picked up the other parts. It had 60 light trail hours from a 18 year old that weighed 120lbs. Picked up a Boysen rad and apex head
Nice! Sounds like a solid buy for sure. Great bikes, I love mine! They are very good bikes. Here is a video on a 23 where it broke the stock piston. th-cam.com/video/LbOe7FR2fws/w-d-xo.htmlsi=UwDZyQU9LG2iVU9b
www.decallab.eu/ if you email them and tell them what bike you have and you would like to see a list of all graphics available for the bike they will respond with a link to over 100 designs. In there you will find this design
Thanks man!! Appreciate it! I like to do 3 good heat cycles. Letting it get fully warm on the stand. Then cooling off before next cycle. Checking fluid levels along the way. Then on the first ride I make it a shorted ride, about 8 minutes or so and avoid long full throttle runs. Come back in check the fluids again. If alls well then shes good to go!
@@RAMBO56WATP can you get shoe goo in Scotland? Yz125 rebuild video will be coming as soon as one comes around that needs a full rebuild. So far I finding out the bottom end on the yz125 is pretty long living, which is good
@@RAMBO56WATP nice! That stuff works good on the bottom of boots too. Put a layer where you wear into the boots, give it a good 3 days to dry and the pegs won't eat though it very easily
Hey brother! I hope you are well! Hey I was curious I am having some problems finding a top end for my 22’ yz 125 I know you have done one in the past. You did a wiseco. How. Did you find it? Is a 21 ok? Some websites have them listed together. Wiseco has a call for info. I am in Costa Rica and have a freind coming down and I need to make sure I get the right one.
Hello. As far as I know the 22 piston is surely different than the 2021. The wiseco piston part number for the 2005 to 2021 is 845M05400 and the part number for the 2022 to 2023 899M05400 Hope that helps
When the fuel is atomized or turns into a vapor it drops the oil out of it. I made a video on this if you are interested here is a link th-cam.com/video/VovqIRO1j-c/w-d-xo.htmlsi=MQpS0kJ4FggVmQVN
I try to only run them to 200 hours or less before replacing. More so on the 4 strokes. But with the current economy and stuff I'm looking at maybe going over 200 hours on the smokers.
It was. Now its at 265 and still only measured 1mm left and right on the upper end of the rod. My 2021 is at 75 hours and it shows more wear than hers. Guess she needs to get in that throttle more!
@@sethmacgillivary1281 no up and down play on either. I usually see left and right play get to or past 2mm before up and down becomes present. I don't like to run them that long though. Once the left and right gets closer or above 1.5mm then I pull them out
@@sethmacgillivary1281 thats depends on the rider and conditions, as well as premix ratio used and how well the bike is tuned in (using the correct octane and jetting for the mods and things like that). A slower rider. A crank can last almost as long as the bike if everything is done well. But a very fast guy who stays full throttle lap after lap will surely wear things out much sooner. Especially if the bike is ran lean on premix for this fast rider. But I do expect at least 150 hours out of a crank for myself.
For a A rider it can range from 10 to 20 hours. I would start with 15 hours. If the piston faired out well at 15 then try 20 next time. If it didn't fair out well then try 10 hours on next piston. If it looks perfectly due, not past due, just due then stick with 15 hours
These videos are great 👍👍surprised they don’t get more attn.
Thanks, I appreciate that!
I was thinking the same
awesome video i just got the 22' yz125 first ever dirt bike grew up on atvs.. awesome bike almost to 20 hours! i plan on rebuilding at 30-35 hours mainly trail riding and wide open streets thanks for the info!
Too cool. Thats a good bike. Just picked up a 2021 but after I wear her out I will probably try a 22 or newer. Excited about that one
Another great video!!!
Just picked up a 2018 yz125 bike has 60 trail hours already ordered oem a kit debating on running it longer has 160-180 psi on compression
Congrats on the 2018! I would do the piston as soon as you can. Its not the compression, its more about the piston. Old pistons especially stock cast pistons can break after so many hours. If it was a forged piston like wiseco I would say your safe. But most likely its a stock piston which is cast and not really that strong.
@@UpAllNight91 yeah bikes all stock besides full fmf I picked up the other parts. It had 60 light trail hours from a 18 year old that weighed 120lbs. Picked up a Boysen rad and apex head
Nice! Sounds like a solid buy for sure. Great bikes, I love mine! They are very good bikes.
Here is a video on a 23 where it broke the stock piston. th-cam.com/video/LbOe7FR2fws/w-d-xo.htmlsi=UwDZyQU9LG2iVU9b
Great video I really like the graphics on your wife’s Bike do you know who made them?
www.decallab.eu/ if you email them and tell them what bike you have and you would like to see a list of all graphics available for the bike they will respond with a link to over 100 designs. In there you will find this design
What’s your heat cycle process mate? Vids are great keep them coming on the yz125 love from sunny Scotland 🏴
Thanks man!! Appreciate it! I like to do 3 good heat cycles. Letting it get fully warm on the stand. Then cooling off before next cycle. Checking fluid levels along the way. Then on the first ride I make it a shorted ride, about 8 minutes or so and avoid long full throttle runs. Come back in check the fluids again. If alls well then shes good to go!
@@UpAllNight91 Great sound close to what I was thinking of doing. Love the shoe goo trick. Still waiting for a 125 full rebuild from you👀👀🤙
@@RAMBO56WATP can you get shoe goo in Scotland? Yz125 rebuild video will be coming as soon as one comes around that needs a full rebuild. So far I finding out the bottom end on the yz125 is pretty long living, which is good
@@UpAllNight91 I got some on ebay, was posted to me from London, England. Look forward to it 👍🏼
@@RAMBO56WATP nice! That stuff works good on the bottom of boots too. Put a layer where you wear into the boots, give it a good 3 days to dry and the pegs won't eat though it very easily
Hey brother! I hope you are well! Hey I was curious I am having some problems finding a top end for my 22’ yz 125 I know you have done one in the past. You did a wiseco. How. Did you find it? Is a 21 ok? Some websites have them listed together. Wiseco has a call for info. I am in Costa Rica and have a freind coming down and I need to make sure I get the right one.
Hello. As far as I know the 22 piston is surely different than the 2021. The wiseco piston part number for the 2005 to 2021 is 845M05400 and the part number for the 2022 to 2023 899M05400
Hope that helps
Do you think of the Athena 144 kit for yz125 is it worth it I need more power but don’t want to get a 250 🤙🏻
144 will surely get you more power , but to get that arm ripping torque you will need to just go to a 250
How does migrating oil happen if oil is mixed with gas?
When the fuel is atomized or turns into a vapor it drops the oil out of it. I made a video on this if you are interested here is a link th-cam.com/video/VovqIRO1j-c/w-d-xo.htmlsi=MQpS0kJ4FggVmQVN
What does blow by mean does it mean the rings are worn?
Yes. Compression is blowing by the rings.
@@UpAllNight91 so u can tell if underneath the ring is black right?
Yes. How much black under the rings tells me how good the piston and rings have been sealing off the combustion and heat
How long to you keep your bikes before selling them and buying a new one?
I try to only run them to 200 hours or less before replacing. More so on the 4 strokes. But with the current economy and stuff I'm looking at maybe going over 200 hours on the smokers.
Cool thanks
170 hours on the crank?
It was. Now its at 265 and still only measured 1mm left and right on the upper end of the rod. My 2021 is at 75 hours and it shows more wear than hers. Guess she needs to get in that throttle more!
@@UpAllNight91 any up and down play on either?
@@sethmacgillivary1281 no up and down play on either. I usually see left and right play get to or past 2mm before up and down becomes present. I don't like to run them that long though. Once the left and right gets closer or above 1.5mm then I pull them out
@@UpAllNight91 oh ok how many hours normally does it take for that long?
@@sethmacgillivary1281 thats depends on the rider and conditions, as well as premix ratio used and how well the bike is tuned in (using the correct octane and jetting for the mods and things like that). A slower rider. A crank can last almost as long as the bike if everything is done well. But a very fast guy who stays full throttle lap after lap will surely wear things out much sooner. Especially if the bike is ran lean on premix for this fast rider. But I do expect at least 150 hours out of a crank for myself.
How many hours for a top end would you suggest for a A rider?
For a A rider it can range from 10 to 20 hours. I would start with 15 hours. If the piston faired out well at 15 then try 20 next time. If it didn't fair out well then try 10 hours on next piston. If it looks perfectly due, not past due, just due then stick with 15 hours
@@UpAllNight91 Thanks!
@@JR-ut1yx yes sir!