Suzuki RM 250 2003 - Conrod; Piston and Piston Ring

4-6 CYLINDER, CYLINDER HEAD AND PISTON
CONROD
• Measure the conrod small end bore. (!8-8)
PISTON AND PISTON RING
• Remove carbon deposits from the piston.
• Inspect the piston for wear, scratches and damage.
• Measure the piston outer diameter at 25.5 mm (1.00 in) from
the skirt end.
" Piston diam
Service limit: 66.280 mm (2.6100 in)
# 09900-20203: Micrometer (50 – 75 mm)
• Measure the piston pin bore and piston pin diameter.
" Piston pin bore
Service limit: 18.030 mm (0.7098 in)
" Piston pin O.D
Service limit: 17.980 mm (0.7079 in)
# 09900-20605: Dial caliper
09900-20205: Micrometer
• Remove carbon deposits from piston ring and piston ring
groove.
• Measure the clearances with the thickness gauge.
" Piston ring to groove clearance
Standard: 0.020 – 0.060 mm (0.0008 – 0.0024 in)
# 09900-20803: Thickness gauge
• Remove the piston rings from the piston ring grooves.
• Fit the piston ring into the cylinder and measure the piston
ring end gap with the thickness gauge.
" Piston ring end gap
Service limit: 0.50 mm (0.020 in)
# 09900-20803: Thickness gauge
25.5 mm
(1.00 in)