G.12 Part. N. 8000 B0148 (02-2008)
ENGINE OVERHAULING
Cylinder piston fitting
The cylinder and piston are supplied matched; if by chance cylinder liners and
pistons become mismatched then measure their diameters as follows:
Cylinder bore
Use an internal micrometer (Dc) and take the reading at “A” distance from the
top 0.80 in. (250cc) or 0.39 in. (450-510 cc).
Piston diameter
Take the piston diameter (Dp) at “B” distance of 6 mm/0.24 in. (TE-TC-TXC 250),
8 mm/0.31 in. (TE-SMR 450/510), 9 mm/0.35 in. (TC-TXC 450-510), from the top.
The clearance is = Dc-Dp.
MODEL CLEARANCE (Dc-Dp) WEAR LIMIT
250 0,020÷0,046 mm 0,10 mm
(0.00079÷0.00181 in.) (0.004 in.)
450-510 0,025÷0,055 mm 0,12 mm
(0.0010÷0.0022 in.) (0.0047 in.)
SMR 450-R 0,040÷0,060 mm 0,12 mm
(0.0016÷0.0024 in.) (0.0047 in.)
To Next Page
Loading...
Need help?
General
