I recently picked up a 2000 trx 90 that had been sitting for a couple of years. It had no compression when I took it apart. New piston,rings, head job, and brand new carb. It will crank with a shot of ether but will not stay running, and it will not start with out ether. I’ve done every adjustment I know of to the carb to fix this and I am at the end of my rope. Anyone have any idea of what to try next.