
'61HN252' by American Honda Motor Co. - Page 189 of 540
http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2...
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3/9/2008 10:52 PM
[2005-2008] [TRX500 FA/FGA]
CYLINDER/PISTON
SERVICE INFORMATION
GENERAL
·
The cylinder and piston can be serviced with the engine installed in the frame.
·
Take care not to damage the cylinder wall and piston.
·
Be careful not to damage the mating surfaces when removing the cylinder.
·
Rocker arm and valve lubricating oil is fed through the oil passage in the cylinder. Clean the oil passage before install-
ing the cylinder.
· When disassembling, mark and store the disassembled parts to ensure that they are reinstalled in their original loca-
tions.
SPECIFICATIONS
Unit: mm (in)
ITEM
STANDARD
SERVICE LIMIT
Cylinder
I.D.
92.000 92.010 (3.6220 3.6224)
92.10 (3.626)
Out of round
0.10 (0.004)
Taper
0.10 (0.004)
Warpage
0.10 (0.004)
Piston,
Piston O.D. at 15 (0.6) from bottom
91.965 91.985 (3.6207 3.6214)
91.90 (3.618)
piston pin,
Piston pin hole I.D.
20.002 20.008 (0.7875 0.7877)
20.04 (0.789)
piston ring
Piston pin O.D.
19.994 20.000 (0.7872 0.7874)
19.96 (0.786)
Piston-to-piston pin clearance
0.002 0.014 (0.0001 0.0006)
0.08 (0.003)
Piston ring end
Top
0.15 0.30 (0.006 0.012)
0.5 (0.02)
gap
Second
0.30 0.45 (0.012 0.018)
0.6 (0.02)
0.20 0.70 (0.008 0.028)
Oil (side rail)
Piston ring-to-ring
Top/Second
0.030 0.060 (0.0012 0.0024)
0.09 (0.004)
groove clearance
Cylinder-to-piston clearance
Connecting rod small end I.D.
20.020 20.041 (0.7882 0.7890)
20.07 (0.790)
Connecting rod-to-piston pin clearance
0.020 0.047 (0.0008 0.0019)
0.10 (0.004)
TOOLS
Cam chain tensioner stopper
07NMG-MY90101
or 07ZMG-MCAA400 (U.S.A. only)
9-3