Combustion Chamber Cleaning - Segway SNARLER ATV 2021 Series Service Manual

ENGINE TOP END ENGINE TOP END
Combustion Area
NOTE NOTE
The valves can be re-faced or end ground, if necessary.
They must be replaced if extensively worn, burnt, bent
or damaged.
◆ Measure diameter of valve stem with a micrometer
in three places, then rotate 90° and measure
again (take six measurements total). Compare to
specifi cations.
Valve Stem Diameter:
Standard
5.455 ~ 5.470 mm
Exhaust:
(0.2147" ~ 0.2153")
5.475 ~ 5.490 mm
Inlet:
(0.2155" ~ 0.2161")
◆ Measure diameter of valve stem with a micrometer
in three places, then rotate 90° and measure
again (take six measurements total). Compare to
specifi cations.
Valve Guide I.D.:
5.500 - 5.515 mm(0.2165" ~ 0.2171")
◆ Be sure to measure each guide and valve
combination individually.
NOTE NOTE
The valve guides cannot be replaced.

Combustion Chamber Cleaning

Combustion Chamber Cleaning
WARNING WARNING
!
Wear eye protection during combustion chamber cleaning.
◆ Clean all accumulated carbon deposits from
combustion chambers and valve seat area.
NOTE NOTE
Carbon Clean Fuel Treatment can be used to help
remove carbon deposits.
CAUTION CAUTION
Do not use a metal scraper, a coarse wire brush or
abrasive cleaners to clean the cylinder head. Damage
may result.
3-5-24
Service Limit
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