Im looking to upgrade to a different bike. my 1973 Suzuki TS185 is just old and underpowered at 17.5hp. plus its a 2-stroke, which arent as reliable and torquey as 4-strokes. Basically i am on a low budget and need a a dual sport or dirt bike with more than 18hp, a low seat height (im only 5'6'' and 120lbs) and extreme duarability. i prefer a bike between the years of 1995-2005 (anything newer would be too expensive). Ive researched the Honda XR250, XR400, Suzuki DRZ400, Kawasaki KLX300 and like those bikes alot but the 400cc machines usually have a 36in. seat height which i feel would be way to tall and klumsy for my smallness. If anyone has or has owned a good reliable 4 stroke dual sport or dirt bike i appreciate any and all information. I would use the bike to tote around the fields, trails, and smooth country roads of eastern indiana at my dads. And when i need a small fix of adrenaline at my cincinnati home. thanks, Wear a helmet
How old are you? If you are young and still growing, you will grow quickly into a full sized bike. What is your budget? You're going to pay at least $1000 for anything made in the last 15 years.
As for lowering, any of the bikes you mentioned--in fact almost all the modern-ish Japanese bikes--have a linkage suspension, meaning you can buy a lowering link for many models. Between that and taking some foam out of the seat, you can lower it quite a bit without affecting suspension too terribly much. I do notice that bikes with "dogbones" or lowering links do have a softer rear suspension, but if you're not flogging it on a MX track it probably won't matter as much. You can replace it with the stock one someday when you are more comfortable with the height.
The smaller bikes like the TTR and DRZ 125s, the CRF100 and 150 F models (the CRF150R is a whole different beast) are kind of lackluster in performance, both engine and suspension.
The XR250 is a reliable bike with a lot of aftermarket support if you decide you want more out of it someday. The KLX is harder to find parts for but a pretty good bike. One of my friends had one for a long time before she traded it for a CR500.
This is all assuming you are a trail rider ...