Welcome to the forums. Did it just start this after installing the new rings and was it already running right with the big bore kit before?
Did the ATV sit any length of time without it being started prior to you replacing the rings? If it did, there's a good chance the carb could need cleaning. If they sit long without starting, the gas will evaporate, leaving deposits behind that can stop up the carb.the carb was not touched when the rings were put in only thing was i pulled the old piston rings off and put on new ones.
All the starter solenoid does is to send power from the battery to the starter, when the start button is pushed. It doesn't have anything to do with the spark and after the engine starts, it does nothing.i was wondering if a week spark would have something to do with it i have checked 3 plugs (new) and all the same spark so i did a contitnuaty ( how ever that is spelled) test and it has a weak pass through of elect. in the starter solinode. ok and i have gone threw all the conections and all are tight and good.
I agree. I was going to ask the same question about the ring spacing.You may have a ring that is not spaced properly, when you installed the piston kit did you check the end gap on the rings before you put them onto the piston? Also when the cam was installed after the top end was rebuilt, the Lobes should have been facing downward and the 2 "-" marks allign with the top of the head. The valves are set at .004 int and exh. I'm not trying to belittle your mechanical abilities I'm just trying to get all the facts form the time you removed the old piston to the time you re installed everything.
I guess it's possible, but all the ones that I've seen with a bad CDI, it wouldn't start at all.so what is the chance the cdi is blown would it still start?
Glad you figured out the problem.well well well thank u all for the great advice i found the problem and it was the cdi was not grounded all the way you all have beena great help.
Best of luck to him and have fun!!you all have helped it be possible for my 11 year old son drag race in the chenango county fair and the broome county fair thank you all.