Need advice about 50cc Piston rings!

[Burning Rubber]

Hey I have a Go-Kart with an engine that is about 49 to 50cc's in displacement I recently took of the air cooled cylinder head to clean the inside. But as i was trying to put the piston back inside the cylinder one of the rings snapped! So i pulled it off and tryed to start the negine with only 1 ring left. It started after a bit of cranking but the engine sounds clunky and stalls after a few seconds staying on idle. I can run it by keeping the revs up but it will stall if i close the throttle. What should I do, should i buy a new ring or would something else maybe be the problem? And if it is the ring i would need to know what sort of shops would sell 50cc piston rings? Could someone please help me out.

 

[robin]

pictures would help

 

[2or3wheels]

yeah i dont know search on the internet for your motor model and look for parts for it.

 

[crazycart]

i did the same thing to my 50cc mini chopper,so i just mounted a 5hp briggs on it

 

[Jblankster]

yep. new piston ring would be necessary, and change the oil (if its a 4 stroke ) after.

 

[2or3wheels]

iwould assume 2 stroke because of the size but could be 4

 

[Burning Rubber]

Yeh it is a 2 stroke but its a sort of HEMI as well the [piston and cylinder are both hemisperical. I don't really wanna put a whole new engine on so I will probly look for piston rinmgs but i don't really no where to look

 

[Burning Rubber]

Here are some pics of the piston and the cylinder and the broken ring and also the good ring

 

[crazycart]

just get a new ring kit for it and be VERY careful with putting it back on the rings are very fragile do 1 ring at a time

 

[2or3wheels]

dont open them up all the way, lide them down the pisition so they stay as round as possible. What im saying it dont put the in on the side go from the top and slide down.

 

[2or3wheels]

by the way thats a 2stroke and those are really needy with compression.

 

[Burning Rubber]

Thanks 2 or 3 wheels i didn't no that 2 strokes depended on compression that much. i'm thinking of going to a motorbike shop that sells little pocket bikes cus if they have spare parts they will probly have spares for 50cc engines.

 

[crazycart]

look on ebay,i have went around to some shopos that sell these things with the 50cc engines and they dont have parts they just import the vehicles from china or w/e and sell them.

 

[Jblankster]

yea, also they need some back pressure in the exhaust to start. so if you go straight pipes, have a reducer someware in the exhaust pipe

 

[Burning Rubber]

Nah i don't have straight pipes i don't really have any pipes just a standard lawn mower muffler right after the exhaust port. Thanks for the tip

 

[Burning Rubber]

Good news, I have found some shops that might sell the rings i need. There is a market near where I live that has a shop that sells mini bikes and also there is a lawnmower shop near where I live which I hope sells engines as big as 50cc's