hi me and the old man have an old rtx twinshock in the garage but it wont start it wil if you bump start it but wont tick over and it wont kick either it has a new piston and rings and the carb is fine everything seems to be fine but we just cant seem to get it going anyone got any tips

I am assuming it's got good compression since you have a new piston and rings in it. From your lingo "it won't tick over" I thing you mean once you push start it it won't stay running at idle? If that's the case, make sure the pilot jet is not plugged and check for air leaks. Maybe a bad crank seal on the mag side? Is it piston port or reed? It could have a broken reed. This would cause what (I think) you describe.

Its a fourstroke isn't it? Speak to jon Bliss cotswold Motorcyclres he imports the trash and should be able to help.