Ask firepower354 but I believe the 57 is abit too much....unless they have a scut kit that works.

 

55mm is pushing it. 57 requires re-sleeving. There are pre-made 57mm kits, but not with steel sleeves. $219 for piston kit, gaskets, your jug re-sleeved and bored to match the piston perfectly.

 

I tried taking one out to 57 from a cast iron and from an aluminum. You can make a thin 56 as a max. I'd say buy the 160 scut or have firepower make ya right.

 

flash back to 2006

a jialing cylinder will go out to 54mm easy and accept tbwo345 piston

this was our original GPX 131cc



bro we have aluminum cylinders w/ steel sleeve 57mm just like the first tb 146cc kits sitting here ready to $169



if you want a ceramic cylinder 57mm its more



keep these jailing questions comming man this is old school 2006



we were the first ones to post rear wheel dynos of the jialing 124cc and then the 146cc big valve 15.4hp

fastest thing out at the time

 

flash back to 2006

a jialing cylinder will go out to 54mm easy and accept tbwo345 piston

this was our original GPX 131cc



bro we have aluminum cylinders w/ steel sleeve 57mm just like the first tb 146cc kits sitting here ready to $169



if you want a ceramic cylinder 57mm its more



keep these jailing questions comming man this is old school 2006



we were the first ones to post rear wheel dynos of the jialing 124cc and then the 146cc big valve 15.4hp

fastest thing out at the time

Yeah...I have a tbolt 57mm cylinder on one of mine and still runs like a champ 2 years later. Didn't know they were still available as no one has them on their website anymore.

 

do these fit into the cases without modification?

 

We bore the cases on 57mm and up (we do 58-59mm kits too), since the paper thin spigot binds in the cases about half the time. Allows us to leave most of the 62mm OD sleeve, reducing heat-induced distortion. I didn't come around here 'till 06, but our 146 had been pounding the SuMo tracks for a while. Still is

 

Yeah...I have a tbolt 57mm cylinder on one of mine and still runs like a champ 2 years later. Didn't know they were still available as no one has them on their website anymore.

thank you very much J

here it is ,,,and we have them in stock

TBolt USA, LLC » Pit Bike Engine Parts » GPX YX 124/140 PARTS & KITS » GPX & YX 146cc Bore kitAluminum Cylinder



we have hundreds of products listed online and in STOCK every day