This particular machine is frame number 927 with engine serial number 800. The bike was restored in the 1990s, using many NOS OEM parts, including the rare YB92 racing seat. The factory block-off plate is installed to fill in the space where the starter motor once resided. This saves about 10 lbs of weight from the machine, which normally weighs about 242 lbs. This early model machine has an aluminum fuel tank. It would have come with aluminum front fender, side covers and rear shock cover plates, which were fragile and replaced by steel components in later production runs. This bike has those steel replacement parts.