Checking the cylinder

1. Measure:

• Cylinder bore

If not as specified, re-bore or replace it

NOTE:

Order	Job name/part name	Quantity	Remarks
	Removing the cylinder and piston Cylinder head Cylinder bolt Timing chain guide (exhaust side) Cylinder head gasket Cylinder Dowel pin Cylinder gasket Piston pin circlip Piston pin Piston Piston ring (top) Piston ring (2nd) Side rail/Spacer	2/1		Remove the pieces in order See section on PISTON RINGS
		See section on PISTON AND CYLINDER INSTALLATION
		CYLINDER REMOVAL See section on PISTON AND CYLINDER INSTALLATION
	Rever removal procedure for installation

Measure the cylinder bore with a cylinder bore gauge Measure the cylinder bore in parallel to the right angles on the crankshaft. Then, find the average of all the measurements

	CYLINDER BORE YP125D: 53,700 ~ 53,705 mm
YP150D: 59,500 ~ 59,515 mm <Maximum disparity between measurements A, B, and C: 0.03mm>

See section on PISTON AND

2. Measure:

• Warping

If more than specified, then replace

Cylinder warping limit: 0.03mm

CYLINDER AND PISTON ENG

PISTON AND PISTON PIN INSPECTION

1. Measure:

• Piston skirt diameter

If not as specified, replace

(a) 4 mm from the piston bottom edge

	Piston skirt diameter: YP125D: 53.670 ~ 53.687mm
YP150D: 59.470 ~ 59.487mm

2. Calculate:

• Piston to cylinder clearance

Piston to cylinder clearance = Cylinder bore -

Дата добавления: 2014-12-23