i dd it like you did,just no nylon bushing on the square steel plate,it is justa oome shot deal,and i did it with a steel hole saw;from 125 to 171cc; but the saw cut a 1mm groove on the crank round balancer,so,steel chips got inside;har a hard time fishing them out with magnets; changed oil and cleaned the screen a few times seems ok,i will drive it on the street,soon; so far it has been tested for around 2 miles,runs good The big problem is that i reused the 125cc head and now the compression is huge and the starter has a very hard time turning over (it does at the 2nd or 3rd try,and it starts immediately) and the kick starter is impossible to get down against the compression, even if i totally stand on it, it takes 15 to 30 secs to go down a sandwich plate 0.75 or 050 mm thick,i will do the calculations,with 2 gaskets ,i should have installed on the bottom of the cylinder, may still have to do that if i don't find another way; that or installing 3 or 4 head gaskets, need to calculate that too that why the seller stated that the 125cc head could not be re-used
How did you clean the metal shavings out? I attempted something similar and my crank bearings are now destroyed after a very short time running it. I filled the jug to the brim with oil & turned the engine a few times like 10 times.
Hi, I cleaned the crank room with diesel. I flushed out about five times. And it was Ok. Also that is true that I filled the space around crank shaft by old tatters during drilling.
![GY6 [EVERYTHING YOU NEED TO KNOW] decode your engine!](/img/1.gif)
i dd it like you did,just no nylon bushing on the square steel plate,it is justa oome shot deal,and i did it with a steel hole saw;from 125 to 171cc; but the saw cut a 1mm groove on the crank round balancer,so,steel chips got inside;har a hard time fishing them out with magnets; changed oil and cleaned the screen a few times seems ok,i will drive it on the street,soon; so far it has been tested for around 2 miles,runs good
The big problem is that i reused the 125cc head and now the compression is huge and the starter has a very hard time turning over (it does at the 2nd or 3rd try,and it starts immediately) and the kick starter is impossible to get down against the compression, even if i totally stand on it, it takes 15 to 30 secs to go down
a sandwich plate 0.75 or 050 mm thick,i will do the calculations,with 2 gaskets ,i should have installed on the bottom of the cylinder, may still have to do that if i don't find another way;
that or installing 3 or 4 head gaskets, need to calculate that too
that why the seller stated that the 125cc head could not be re-used
How do I know if the head bolts are going to fit?
Good job 👍🏽
How did you clean the metal shavings out? I attempted something similar and my crank bearings are now destroyed after a very short time running it. I filled the jug to the brim with oil & turned the engine a few times like 10 times.
Hi, I cleaned the crank room with diesel. I flushed out about five times. And it was Ok. Also that is true that I filled the space around crank shaft by old tatters during drilling.
no music please, if you insist on music, something soothing and pleasant not that loud rubbish,
Crank size