I recently had a customer looking for a cyclinder for his Kawasaki KLX250 and wasnt able to locate from my normal distributor. I was told that most of the companies producing Cylinders tend to drop off with certain models directly after a change in engineering at the oem. This makes little sense to anyone riding or restoring something older but from the standpoint of those producing there is only so long a part is profitable especially in the fast moving world of powersport. Luckily when the larger American firms choose to no longer import these parts there are companies such as AHL that pick up the slack and continue to reproduce them. Using the same tooling as the factory OEM AHL produces Cylinders and Pistons for older model Japanese bikes both on and off-road.