G.12 Part. N. 8000 H1344 (10-2009)
ENGINE OVERHAULING
Cylinder piston tting
Cylinder bore
Use an internal micrometer (Dc) and take the reading at “A” distance from the
top 0.80 in. (310 cc) or 0.39 in. (450-510 cc).
Piston diameter
Take the piston diameter (Dp) at “B” distance of 8 mm/0.31 in. (TE-SMR 450/510),
9 mm/0.35 in. (TE 310, TC-TXC 450-510), from the top. The clearance is = Dc-Dp.
MODEL CLEARANCE (Dc-Dp) WEAR LIMIT
310 0,037÷0,063 mm 0,15 mm
(0.00146÷0.00248 in.) (0.006 in.)
450-510 0,025÷0,055 mm 0,12 mm
(0.0010÷0.0022 in.) (0.0047 in.)
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