yea this one was bone stock. I noticed it in 3rd and beyond. No big deal it was the only thing that I noticed. I was really cookin on it too. Legendary quad thoughI have one and it hauls azz. Too tall of gear ratio ???? What!!!!! I'd say 1,2,3 are very close together super for low speed tight trail riding ,way better Than my 450 was. I was always searching for the right gear.4,5,6 gear are for speeeeeed. You can rev the bag off of it and it just goes better. If it's got aftermarket pipes then the power should be more usable then with stock pipes which were like a light switch, but still loads of fun.
Yes if it runs then it's all good, go for a ride and check out the shifting, how's the motor sound, is it tired. Clean everything up, then go through it. Chain,gears, clean carbs ,maybe a tors delete kit. and if you want it doesn't cost a fortune to rings and a hone or new pistons.