Compatible with 1200-1600cc Type-1 engines For 0.25mm reground crankshafts Standard case bore and thrust face This Engine Main Bearing set is designed for Type-1 engines ranging from 1200-1600cc. It’s ideal for engines with a 0.25mm reground crankshaft, maintaining standard case bore and thrust face specifications. Ensure proper fitment and smooth operation with these high-quality bearings. They are a reliable choice for engine rebuilding or performance upgrades, offering durability and precision .