2-32
GEN-0027
6. After reconditioning the valve seat, the valve seat
could be narrow. In this case, recondition the valve
seat using the 45° cutter. After reconditioning,
thoroughly remove any burrs which may be
caused by grinding. The valve seat surface should
be smooth but not too glossy. Repeat the valve seat
repair procedure on the remaining valve.
NOTE: After reconditioning all valve seats, thor-
oughly clean the seat and its vicinity.
Valve Springs
1. When the valve springs are weak, the valve and
valve seat fail to form a good seal, thus allowing
gas to leak past the valve seat causing a loss of
power. Whether or not a valve spring is weak can
be determined by its free length.
GM128D
2. Minimum valve spring free length must not
exceed speficiations.
NOTE: With the crankshaft at top dead center on
the compression stroke, install the valve springs
and spring retainers; then compress the valve
springs and install the valve keepers.
PISTON ASSEMBLY
NOTE: Oversized pistons are available allowing
the cylinder to be bored oversized.
NOTE: Whenever a piston, rings, or pins are out
of tolerance, they must be replaced.
Cleaning/Inspecting Piston
1. Using a non-metallic carbon removal tool, remove
any carbon buildup from the dome of the piston.
2. Inspect the piston for cracks in the piston pin,
dome, and skirt areas.
3. Inspect the piston for seizure marks or scuffing.
NOTE: If seizure marks or scuffing is detected,
the piston must be replaced.
4. Inspect the perimeter of each piston for signs of
excessive “blowby.” Excessive “blowby” indicates
worn piston rings or an out-of-round cylinder.
Removing Piston Rings
1. Starting with the top ring, slide one end of the ring
out of the ring-groove.
2. Remove each ring by working it toward the dome
of the piston while rotating it out of the groove.
NOTE: If the existing rings will not be replaced
with new ones, note the location of each ring for
proper installation. When installing new rings,
install as a complete set only.
Cleaning/Inspecting Piston Rings
NOTE: If replacing the rings, make a ring-groove
cleaning tool by taking an old piston ring and
snapping it into two pieces; then grind the end of
the old ring to a 45° angle and to a sharp edge.
1. Using a ring-groove cleaning tool, clean carbon
from the ring-grooves. Be sure to position the ring
with its tapered side up.
Measuring Piston-Ring End Gap
(Installed)
1. Place each piston ring in the wear portion of the
cylinder. Use the piston to position each ring
squarely in the cylinder.
NOTE: When measuring a piston ring, it should
be placed into the area of the cylinder where wear
is least (the area is about 3 mm (0.12 in.) from the
upper or lower edge of the cylinder).
2. Using a feeler gauge, measure each piston-ring
end gap. Acceptable ring end gap must be within
specifications.
! CAUTION
Avoid using a lapping compound after this
procedure.
! CAUTION
Improper cleaning of the ring-grooves by the use
of the wrong type of ring-groove cleaner will
result in severe damage to the piston.
Содержание 660 cc
Страница 18: ...2 6 4S ENG04 Assembly Schematic 660 cc...
Страница 19: ...2 7 2 4S E RP04 T...
Страница 20: ...2 8 4S E C04 T...
Страница 148: ...Wiring Diagram Ignition 660 cc Turbo Harness p n 3006 843 0739 280 5 15...
Страница 149: ...Wiring Diagram Ignition 660 cc STD Harness p n 3006 606 0738 189 5 16...
Страница 150: ...Wiring Diagram Ignition 120 cc Harness p n 0686 684 0737 331 5 17...
Страница 156: ...Wiring Diagram Main Bearcat W T Harness p n 0686 804 0738 150 6 6...
Страница 158: ...Wiring Diagram Hood Bearcat W T Harness p n 0686 868 0738 175 6 8...
Страница 159: ...Wiring Diagram Main Hood 120 cc Harness p n 0686 684 0737 331 6 9...
Страница 265: ...8 65 8 ARCTIC CAM ARMS 04 CAM...
Страница 280: ...9 7 9 735 315A 0739 320 T660 Touring Models IDLER WHEEL MTG HOLE Pantera 800 EFI Bearcat Wide Track...
Страница 360: ...9 87 9 0728 001 0000 004 0728 002 0000 004 0728 004 0000 006...
Страница 361: ...9 88 0728 006 0000 007 0728 007 0000 008 0728 008 0000 009...
Страница 362: ...9 89 9 0728 009 0000 007 0728 010 0728 019 0000 011 0728 011 0000 012...
Страница 363: ...9 90 0728 012 0000 013 0728 013 0000 013 0728 015 0000 015...
Страница 364: ...9 91 9 0728 016 0000 016 0728 017 0000 017 0728 018 0000 018...
Страница 365: ...9 92 0728 021 0000 087 0728 022 0000 018 0728 023 0000 089...
Страница 366: ...9 93 9 0728 024 0000 090 0728 025 0000 091 0728 026 0000 092...
Страница 367: ...9 94 0728 027 0000 017 0728 028 0000 020 0728 029 0000 021...
Страница 368: ...9 95 9 0728 030 0000 022 0728 031 0000 023 0728 032 0000 038...
Страница 369: ...9 96 0728 033 0000 093 0728 035 0000 094 0728 036 0000 095...
Страница 370: ...9 97 9 0728 037 0000 096 0728 038 0000 097 0728 039 0735 365 0728 040 0728 040...
Страница 371: ...9 98 0728 041 0735 366 0728 042 0728 042 0728 043 0728 043 0728 047 0728 047...
Страница 372: ...9 99 9 0728 048 0738 017 0728 049 0738 018 0728 050 0738 019 0728 065 0738 355...
Страница 373: ...9 100 0728 067 0738 356 0728 072 0738 357 0728 076 0738 358 0728 081 0738 359...
Страница 374: ...9 101 9 0728 083 0738 360 0728 084 0738 361 0728 116 0739 222 0728 117 0739 223...