I just got done doing a ground up rebuild of the entire 4-wheeler. The bike is very near stock, but with some minor tweaks that make it run very well. There are a few aftermarket/not stock parts, but I do still have possession of the majority of the original parts. To give a good idea of what has been done here's a list of modifications.
Top-end: Fresh rebuild, slightly bored over, milled head, and race porting. All motor work was done by Lindsey Machine in SLC. If you know who they are you know they are the best at what they do.
Intake: Has a new 38mm flat slide carb (34mm is stock)to increase breathing and significantly increase power. Boysen carbon fiber reeds have been installed as well. It is all topped off with a K&N air filter and a Outerwears filter gaurd.
Exhaust: FMF Gold Series "Fatty" pipe with a FMF Power Core Silencer. New exhaust springs.
Bottom end: Fresh clutch & new oil. New water-pump seals.
Frame: Cleaned with no cracks or dents. New pivot bolt, bushings, & spacers for the swing arm. A-Arms and swing-arm have been repainted to silver. New TAG handlebars were installed to increase handling and maneuverability.
Lines: New clutch and throttle cables. New stainless steel/braided brake lines.
Wheels/Tires: All are in great condition. Front set are stock tire/rim. There are two rear sets: A set of Holeshots and a set of Skat-Trak 8 paddle haulers. Both in excellent condition.
This thing is an animal. I have had it for the past 10 years or so and have babied it. I purchased it from the original owner and he barley rode it. Let me know if you have any other questions... I will be happy to answer.
1991 Yamaha Blaster YFS200. It is in great shape, and have know all of the owners since new. We are the 3rd owners and have taken care of the bike really well. The top-end has been just rebuilt. It has a FMF pipe and silencer and it is one of the peppiest Blasters that I have ever ridden. It doesn't have as many modifications as the Honda, but is super reliable.