I bought two sunl 90st atv and one sunl 110st, one of the sunl 90 had a problem with the batteries and it would stay on, it keep staling and charger didn't work, on the other sunl 90st the batteries and i couldn't shout the atv off I had to pull the staffy plug, and the lock remote didn't work, and the wheel came off , the sunl 110st atv did a little better but the chain wouldn't stay on... The day after i got the three atv's I called and said I had problems with the atv's but the man I needed to speak to was gone for the night and the man told me to call back the next day and talk to John so I did and explained everything all over again, john asked me to try some stuff but I didn't know what to look for, and he asked me to put them back on the chargers over night and call him back, when I did get back with him and said he could get parts, and i didn't hear back from him for awhile then he asked me to send pictures so I did that twice for him, and still didn't hear from him for awhile, then 6 moths later he lets me know he is getting a new supplier and will send part asap and I sent a few more emails, without a response back two months after that I got some two batteries and new starters. And the one 90 still don't work and the other will not keep a charge, the 110 needs a starter and cellinoid, from what I was told... Very sad customer, spent a lot of money on new atv and they don't work...