I have NEVER had good luck (making some extra cash, I am retired) with rebuilding old Japanese dirt bikes. I have rebuilt from the frame up a Honda TL125 a Kawasaki 250 KLR and now presently on the lift I have a Suzuki DR125. I have ALWAYS had luck rebuilding old British bikes. The parts for British bikes are available and at a RESONABLE cost and people will pay a good price (fair) for my machines. I will give you an example, I bought my little Suzuki with 2500 miles on it. The bike was lacking performance and bogged down when climbing a hill so I decided to look into the prob. Someone had replaced carburetor with a different type so I tried to find proper carb - 350.00 bucks for a carb - WHAT, I didn't pay that for the bike. I think someone took old carb off and sold it on ebay. But, the person that retrofitted the replacement carb did a good job and I decided to plug on. After much looking I found a carb that looked like the picture (matching specs from workshop manual) and with a little work I got carb to fit (30.00). Bike runs great now. My point being is that any Japanese dirt bikes over 10 years old is just a money pit. They are and always have been throw away bikes not ment for the long haul. Most British and Harleys and any quality machine were pushed into a corner if not working and left there until someone says "hey, look what I found" and those machines get rebuilt and on the road again. Now I will say that Japanese road bikes are a different story and I would prefer to ride on road - but parts will be hard to find after 10 years. Please this is not a I love British bikes kind of rant but one of parts are easy to find and reasonable not so with Japanese bikes.