Service manual

Raider Mini 90 (single/double-seat): Service Manual Version：2.0 Feb. 2006

b) Remove the cylinder head;

Remove the cylinder carefully to see the whole

piston;

Remove one piston pin clip, and remove the piston

and piston pin;

Spread and remove each piston ring.

NOTE: Don’t let the clip drop into the engine

crankcase.

3.1.3 Cylinder and Piston Inspection

a) Inspect the cylinder bore for wear or damage;

Measure the cylinder inner diameter at three levels

in X and Y-Axis;

Taper limit: 0.05 mm

Out of round limit: 0.05 mm

b) Check the cylinder head mating surface for warp

with a straight edge and feeler gauge;

Service limit: 0.05 mm

c) Insert each piston ring into the cylinder;

Measure the end gap;

Service limit: 0.45 mm

Locating pin

Bush

Cylinder Body

Cylinder Head Mating Surface

End Gap