162fmj Engine Service Manual May 2026

The manual specifies NGK CR7HSA or CR8HSA. Using a longer plug (like a CR9E) will punch a hole in the piston. Using a shorter plug causes misfires.

Over-tightening a cylinder head bolt on a 162FMJ can warp the aluminum cylinder head. Under-tightening can blow the head gasket. The service manual lists exact Newton-meters (Nm) for: 162fmj Engine Service Manual

Many riders convert the 162FMJ to a 183cc (Moderate) or 212cc (Extreme). Using the manual's cylinder stud spacing (typically 62mm center-to-center), you can determine if a 67mm piston will fit. The manual’s coolant jacket depth tells you how much you can safely bore. The manual specifies NGK CR7HSA or CR8HSA

To demonstrate the value of the 162FMJ Engine Service Manual, let’s walk through a theoretical top-end rebuild. A generic YouTube video skips the details; the manual forces you to check them. Over-tightening a cylinder head bolt on a 162FMJ