1. Mount:
• Double end bolt (1)
2. Mount:
• Piston (1)
• Piston pin (2)
• Circlip (3)
CAUTION:
• Arrow (4) on the piston must point to the
forward engine
• Before mounting the piston pin, cover
crankcase hole with cleaning towel or clothes
for avoiding circlip and other small parts
dropping into crankcase.
• Be sure to use new circlip.
3. Apply oil:
• Apply 4-stroke machine oil on the piston
pin, piston ring groove, and piston edge.
4. Installation of piston ring
Assemble the piston ring split clearance stag
-
geringly according to showing figure.
(1) Top ring
(2) Oil Ring (lower ring)
(3) The second ring
(4) Oil ring (upper ring)
5. Install:
• Cylinder body washer
• Locating pin (2)
• O-ring (3)
CAUTION:
Be sure to use new sealing washer and o-ring.
CAUTION:
• Be sure to check the standard of manufac
-
ture and engraved figure on the ring. The
marking sufure is toward the piston top.
• Before mounting cylinder, apply a layer of
4-stroke engine oil on piston ring.
1
2
3
4
1
3
2
212
Summary of Contents for WD250U
Page 1: ...WD250U Service Manual For any questions please contact Baja Motorsports at 888 863 2252 ...
Page 23: ... II Wiring diagram 1 23 ...
Page 24: ... III Wiring diagram 2 24 ...
Page 25: ... IV Wiring diagram 1 25 ...
Page 31: ...Section 8 Lubrication I Lubrication oil way 31 ...
Page 120: ...119 ...