Well, it's almost 100% original. It has an FMF pipe on it but I got the stock exhaust with it too. Besides these bikes were too restricted with the stock exhaust. Which 2-stroke ATV from the '80's wasn't?? Well Anyways, I purchased this about a couple months ago and it has quickly become my favorite ATV ever. The size and power of this thing is LARGE. It is very comfortable to sit on. If you're over 6 feet tall (Im not) this thing would be fine for you. After getting off this quad and then getting on a TRX250R I can't help but feel cramped and crowded on the TRX. And as far as the power goes, it has that big grunt down low and long legs up top. What a blast to ride, especially if your a 30 or 40 something year old Vet rider. And you just want to gas it and go up anything or anywhere. The suspension is stock but it is very plush and feels wide and stable. No need to modify the suspension on this. Im sure if they're are any other 'zilla owners out there they will agree these were some nice vehicles. If ever there was a machine the manufacturers should revive it would be something like this.