Probably one of my favorite videos ever, I know someone who is charging people for a video of them assembling this exact engine and I’m so glad you were able to do it for free, big help big love🙏
Great video. Thanks for taking the time too make it. Goin too have a watch at some motor. Im good with car enginea, but shit with bike engines. Even tho ive had a road legal monkey for 7 yrs. Think im goin too buy a wee cheapo engine too strip and rebuild
I disassembled an old pit bike engine a while ago. It was sitting in a box since than. It was no way of ever puting it back together, but here you came, saving my engine with your videos. Nicely done!
i got a question, at 8:18 minutes in, there is a plug that sits above the front sprocket in your video. Do you by chance have any idea what thats called? my sons pit bike is missing that and leaking oil like crazy. i need to order a new one but have no clue what its called
Great work kudos man. Any tips, im fixing two of my buddys 125cc china pitbike (apollo, tao) and need to replace head, cyl. And pistons. Thankyou and these videos are great!
do you need to use a torque wrench to tighten up the 4 nuts that sit on top of the valves & cylinder head or just a normal socket wrench like in your video? some say you need to use a torque some say you don't, what would you guys recommend....
That flywheel is supposed to be really tight, right? Because it seems like mine has loosened up, it isn't really supposed to spin freely counter clockwise, is it?
Make sure the keyway is correct installed, if you turn it by hand you should feel the compression. Tight the nut on the flywheel as hard as you can get. You can use impact wrench or block the engine.
Brooo my flywheel was rusted out I had another engine so tried to put that engines flywheel and stator on mine but the lil pin to aim you flywheel like the crankshaft lil pin it broke off so now the flywheel is on but the crankshaft is moving but the flywheel isn’t help me out.
I have an Apollo Rfz 125. When it’s in neutral you can rotate the drive sprocket by hand (chain is off) and it will catch and lock up. If driving it it will make a catching noise more in 1st and 2nd and lock up the chain. Any ideas? My first thought was it was in 2 gears at the same time or something
if your sprocket locks up. is it indeed so that it takes 2 gear at the same time. this is coused bij misalignment of your shift forks/ drum or wear on them. second option is wrong placement of the washers between the gears on your 2 shafts on the gearbox.
WrenchMaster thanks the bike is less than a year old and has never been apart. So I will make sure the shifter linkages are moving correctly before opening the engine up.
I have a pitster pro. It has been sitting with no oil. It seems seized. I added oil. I can move fly wheel with wrench but when I try to kick start it, it feels like it gets really stiff at certain spots. Anyone have any idea for what to do without having to completely disassembled. Amazing video. That’s some complex stuff.
please help! am in the procces of a top end rebuild for a lifan W150 (very similar engine) how ever im not sure where the collets go between the head and barrell? i need your knowledge.
Thanks for the help I’m 14 and i just finished building the 2nd pit bike i got for 20€ do you know if lifan and loncin engines are the same cause i need to build the 2nd engine but it isn’t the same as the first i built
from Tbolt USA website: END GAPS: Set top ring gap 180 deg at the wrist pin, then evenly spaced at one third intervals *Make sure the end gaps of the piston rings are not aligned with one another -evenly space apart or will smoke.
Plz help I took apart my top end and there's these 2 washers that go around the long top end screws and I don't know where to put them plz help I heard the copper one expands
They do not cost very much but i f you put 1 less in, beter be the top one. Nothing wil be damaged. If it is leaking oil on that side you know where its coming from. 😆
Thanks wrench master. I took my timing cover off then I put it back on. Now it leaks oil, before it didn’t. I don’t think there was a gasket on it even before I took it off. Would I need to use rtv to stop the oil leaking
Hi, how many oil seals are on these engine? 3 or more? I now for 3, gear shifter, kick starter and front sprocket. Sry for my bad english but I have loncin 107cc and my engine need big service. Tnx in advance
@@wrenchmaster8889 thank you for answer. I ask because I would like to start to rebuild the engine. I order on ebay complete gasket set and set of oil seals and on set is 5pcs, but i didn't now where they are 5 pcs..tnx on info, that helps to me...do you have any advice or suggestion?
@@wrenchmaster8889 hi, I opened my engine (lc152fmh) and I didn't find 5 oil seals in block, only 3 external...is it weird or not? Or I miss something? Tnx in advance
Hey man,i took the top nut in the flywheel but it wont come out!!! And your videos are fucking lifesaving man you tha real MVP!!!!! If you could help me getting the flywheel out I would really appriciate it man!
I do it always the wrong way but i get them all of, even the old hard ones. heath the flywheel (not the shaft), pry on it and hammer on the shaft WITH nut on. But what i tell you is to buy a flywheel extractor tool specialy made for it.
Thanks for this vid!! Took a 125cc apart yesterday... and when I was pulling off the head, the small tube with the washer you pick up at 4:02 came flying off and couldn't figure out where it goes.
@@wrenchmaster8889 is it important because my ssr125 is missing it, i haven't tried to start it because i believe there are compression problems, but could this neutral switch be the problem"?
T for Top when piston on top position and also T align with indication mentioned on chamber block for timing chain setting and F for fire when u set magnet.
Do you have to have the chain tensioner off when reassembling the engine? I took apart a 125cc to check the cylinder, piston & valves due to low compression. Had to Lap the valve seats cuz the valve wasn't sitting all the way. So now I have to start the process of putting everything back and wondered if having the Tensioner off would make it easier to get the cam gear lined up, but I haven't tried it yet. any tips?
My bike is running because of this video I assembled my bike on my own and it runs perfectly this guy is the best may good bless this guy 🔥🔥🔥
Probably one of my favorite videos ever, I know someone who is charging people for a video of them assembling this exact engine and I’m so glad you were able to do it for free, big help big love🙏
Very nice vid... But valve gap 0,15!!!
The correct clearence is 0,05mm for both valves.
Sorry for the correction.
Awesome series! Thinking about completely dissasembling my enginge now that I´m rebuilding my pit bike into a "miniGP" bike :)
Mckavrh
Great video. Thanks for taking the time too make it. Goin too have a watch at some motor. Im good with car enginea, but shit with bike engines. Even tho ive had a road legal monkey for 7 yrs. Think im goin too buy a wee cheapo engine too strip and rebuild
I disassembled an old pit bike engine a while ago. It was sitting in a box since than. It was no way of ever puting it back together, but here you came, saving my engine with your videos. Nicely done!
Where would I get the oil/oring seals for a 125cc Pitster Pro? Im taking about the ones that go on the cylinder and head.
Do you have to ajust the valve if you rebuild the engine but not for the first time???
I have a pitster pro. It has oil leaking from the chain. Do you have any idea what that would be from?
It’s really hard to line up the cog where the timing chain goes on with the holes
i got a question, at 8:18 minutes in, there is a plug that sits above the front sprocket in your video. Do you by chance have any idea what thats called? my sons pit bike is missing that and leaking oil like crazy. i need to order a new one but have no clue what its called
Great work kudos man. Any tips, im fixing two of my buddys 125cc china pitbike (apollo, tao) and need to replace head, cyl. And pistons. Thankyou and these videos are great!
Where did you get the oil passage way o rings from? I can't find them!
Thanks for sharing your knowledge .
Nice man do you have a link for all the gaskets ?
OMG I LEARNED SOMETHING. THNKS BRO BLURRY BUT FUKET U DID THAT!.
Nice video! How you make your own seal?
Im having troubles with my kick starter. I assembled it right but it slips
do you need to use a torque wrench to tighten up the 4 nuts that sit on top of the valves & cylinder head or just a normal socket wrench like in your video? some say you need to use a torque some say you don't, what would you guys recommend....
I recommend to use a torque wrench, i did it here freely becous dummy engine.
My engine is really hard to turn once I put on the cylinder, any ideas?
So useful videos m8. Im studying automotion and this is so educational. Thanks a lot for the spent time!
No problem.
I would like to know how we fit the piston rings
That flywheel is supposed to be really tight, right?
Because it seems like mine has loosened up, it isn't really supposed to spin freely counter clockwise, is it?
Make sure the keyway is correct installed, if you turn it by hand you should feel the compression. Tight the nut on the flywheel as hard as you can get. You can use impact wrench or block the engine.
What size is the cylinder thinking of rebuilding my engine
Brooo my flywheel was rusted out I had another engine so tried to put that engines flywheel and stator on mine but the lil pin to aim you flywheel like the crankshaft lil pin it broke off so now the flywheel is on but the crankshaft is moving but the flywheel isn’t help me out.
Im.changing the stator and magneto.. on my ssr 125 ... do I have to time it.. I dont think so since the stator and flywheel only have a key way
Just removing the flywheel and stator plate with 2 screw will do. No need for valve timing or so.
how long is the crankshaft?
I have an Apollo Rfz 125. When it’s in neutral you can rotate the drive sprocket by hand (chain is off) and it will catch and lock up. If driving it it will make a catching noise more in 1st and 2nd and lock up the chain. Any ideas? My first thought was it was in 2 gears at the same time or something
if your sprocket locks up. is it indeed so that it takes 2 gear at the same time. this is coused bij misalignment of your shift forks/ drum or wear on them. second option is wrong placement of the washers between the gears on your 2 shafts on the gearbox.
WrenchMaster thanks the bike is less than a year old and has never been apart. So I will make sure the shifter linkages are moving correctly before opening the engine up.
I have a pitster pro. It has been sitting with no oil. It seems seized. I added oil. I can move fly wheel with wrench but when I try to kick start it, it feels like it gets really stiff at certain spots. Anyone have any idea for what to do without having to completely disassembled. Amazing video. That’s some complex stuff.
Try to adjust the cam chain
please help! am in the procces of a top end rebuild for a lifan W150 (very similar engine) how ever im not sure where the collets go between the head and barrell? i need your knowledge.
you must have 2 bushings between cylinder and head.
Je voudrais savoir comment on montent les segments du piston
Great videos! I got a 125 that builds 15psi.. assuming that the rings are gone?
Crikey ! That's worse than mine at 70. And that's after putting a new piston and rings in and lapping the valves !
Very good video for education
1:45 where Do you get that o ring?
What's the rubber ring called at 4:36
Thanks for the help I’m 14 and i just finished building the 2nd pit bike i got for 20€ do you know if lifan and loncin engines are the same cause i need to build the 2nd engine but it isn’t the same as the first i built
All these kind of engines, the 125, and 50 cc horizontal cylinder, are very simular.
Hey can u please tell me more about ring orientation on these engines cuz im gonna rebuild mine and i need help
@@mxcro8316 tboltusa.com/store/tech.php?pID=65/4+Stroke+Ring+stack ther is the answer
is this for kenbo.
Good install ingine
I'm looking for piston diameter 47,5mm with 13mm pin for Fantic motorcycle engine
Hi can u please tell me more about ring orientation on these engines because im gonna rebuild mine and i need help thanks :D
from Tbolt USA website:
END GAPS:
Set top ring gap 180 deg at the wrist pin, then evenly spaced at one third intervals
*Make sure the end gaps of the piston rings are not aligned with one another -evenly space apart or will smoke.
Didn't you forget the guide pins that go between the jug and the transmission
You think it’s possible to convert an electric start engine to a kickstart
Plz help I took apart my top end and there's these 2 washers that go around the long top end screws and I don't know where to put them plz help I heard the copper one expands
Figure it out ?
I can help
Thank you Wrenchmaster What is the difference between 125cc and 110cc
the contents of the cylinder
15cc
Naice wark
6:49 one of those rubber rings was missing on my engine i put everything back in is this bad?
They do not cost very much but i f you put 1 less in, beter be the top one. Nothing wil be damaged. If it is leaking oil on that side you know where its coming from. 😆
@@wrenchmaster8889 ok thanks, no oils coming out so i will asume its allright for the time being. thanks
Good
Hi, 12:05 does the cover need a gasket and does it need to be at a specific position?
Cover needs a round gasket. I don't think there is a specific position.
Thanks wrench master. I took my timing cover off then I put it back on. Now it leaks oil, before it didn’t. I don’t think there was a gasket on it even before I took it off. Would I need to use rtv to stop the oil leaking
Did you make gaskets out of paper?
Gsihhd
what do I align the keyway up with?
keyway inside your flywheel.
Hi, how many oil seals are on these engine? 3 or more? I now for 3, gear shifter, kick starter and front sprocket. Sry for my bad english but I have loncin 107cc and my engine need big service. Tnx in advance
Hi, there is also one on the clutch and the flywheel. but if you open the block you will need more than these seals.
@@wrenchmaster8889 thank you for answer. I ask because I would like to start to rebuild the engine. I order on ebay complete gasket set and set of oil seals and on set is 5pcs, but i didn't now where they are 5 pcs..tnx on info, that helps to me...do you have any advice or suggestion?
@@wrenchmaster8889 hi, I opened my engine (lc152fmh) and I didn't find 5 oil seals in block, only 3 external...is it weird or not? Or I miss something? Tnx in advance
what is the name of the pin with spring you put in on 6:14
I Don't realy know the name, but ist part of the timing chain tensioner.
Ouvre ma c'est cool
Hey man,i took the top nut in the flywheel but it wont come out!!! And your videos are fucking lifesaving man you tha real MVP!!!!! If you could help me getting the flywheel out I would really appriciate it man!
I do it always the wrong way but i get them all of, even the old hard ones. heath the flywheel (not the shaft), pry on it and hammer on the shaft WITH nut on. But what i tell you is to buy a flywheel extractor tool specialy made for it.
Thanks for this vid!! Took a 125cc apart yesterday... and when I was pulling off the head, the small tube with the washer you pick up at 4:02 came flying off and couldn't figure out where it goes.
You have an overvieuw on 4:48. i think you mean the one that goes on the bottom left. Its sealing for oil delivery to the head
gotcha! thanks!!!!! great vid!
@@wrenchmaster8889 Is what are the two parts you install at 4:02? Do they go on the lower left stud?
@@elimokas5095 Its a rubber seal, and yes lower left stud i believe.
Gasket between cylinder and housing is missing.
What is the thing you installed at 8:18 ?
That is the neutral switch, some come even with switches on every gear. underneath there is a hex head with a special washer.
@@wrenchmaster8889 is it important because my ssr125 is missing it, i haven't tried to start it because i believe there are compression problems, but could this neutral switch be the problem"?
@@louiec1848 The neutral switch is elektrical, so it has nothing to do with compression.
@@wrenchmaster8889 So what would it do if I don't have one? I can see the bolt underneath and i have good spark as of now.
@@louiec1848 I think if you leave it like that there will be oil coming out.
Is the engine a Lifan 125cc?
i think it's a orion 125cc
Mizo tawng thiam em?
Masha Allah
Fuck with that evil crap
what does the t and f stand for?
99% it is the 't' that counts. 'f,' i don't know, piston and ignition is delayed.??
WrenchMaster on thank you, and where did you purchase the new piston head?
T=top and i didn't knov fhat meaning f
I reckon maybe its true-false? In the same point as WrenchMaster maybe the ignition is delayed or the distribution un-drafted?
T for Top when piston on top position and also T align with indication mentioned on chamber block for timing chain setting and F for fire when u set magnet.
Great videos :) at 6:08 you insert a rod full of holes with a spring and bolt... What is this unit?
Oh, thats the chain tensioner, pushes down the lever with the gear.
@@wrenchmaster8889 vsjdhhdo
H
@@wrenchmaster8889 hi
Do you have to have the chain tensioner off when reassembling the engine? I took apart a 125cc to check the cylinder, piston & valves due to low compression. Had to Lap the valve seats cuz the valve wasn't sitting all the way. So now I have to start the process of putting everything back and wondered if having the Tensioner off would make it easier to get the cam gear lined up, but I haven't tried it yet. any tips?
Sorry to say but that is a chinese 125 if it was japanese you would have bigger valves meaning more power
Brrrrbooo contine
Gj sir vary nice if you ever do this on a lifan 140cc motor let me know it would be vary helpful.
Wow no assembly lube used at all
No need
This engine is harder to rebuild then my 350 Chevy I rebuilt my 350 Chevy engine before it was easy this one confuse me
110cc
Me parece una 110 no 125