85CC TM RACING PISTON RINGS NEED HELP AS KEEP DO IN SAME THING

need to rebore it to get it smooth again and put an oversize piston in it.. make sure piston/rings are installed correctly nxt time :)

When fitting a new top end you may have broken the piston rings. On a Two Stroke engine the rings have a gap which must not enter any ports. To prevent this the slot for the rings has a metal peg to hold the ring gap in one place.
On Four Stroke engines there is no ring peg as there are no ports.
If a ring breaks whilst being fitted the broken parts will enter a port and then be dragged up and down the barrel causing damage to piston and barrel. The broken parts one having made their way to the top of the piston will be crushed between the cylinder head and the piston damaging both. The cyl head can be re used but the piston is most likely ruined.

Pete

Could be rings ... could be valves ... could be holes in the pistons ... could be hole in the head ... gasket ... could be any combination of troubles ... could be your kick start is not engaging ... (I doubt that) ... good luck with your project. Get a GOOD BOOK on the subject before you turn the first bolt and get your wallet on an exercise program.

you dont need racing piston,,get the first gear fixed,some v-force3 reeds and a good pipe and you will blow the kx into the weeds

That is a classic symptom of a leaky head gasket. You will need to change this asap to prevent further damage to your engine. You would be as well do ing a piston and base gasket change while your at it. And remember to get a new set of cylinder head bolts, for when you put it all back together again.

Cheers,

Andy....

Type in on google tm racing motoman and go to the us distributor he is easy to work with and can get you everything for cheap

piston rings by the sound off it or spark plug lose 1 st get a compression tester take the plug out and screw the compression tester in the spak plug hole and kick the bike over and see what psi it reaches get back to me

hi buddy the standard piston and rings will be the ones you need if its still below 85psi your barrel must be out of shape or you are leaking air in the gasket or in the coolant also when you put a new piston kie in get new gaskets my kx85 new ring and piston went to 185psi

yep. double check all the magnets are there and all wires are intact

whats wrong with them??