2008 Yamaha Raptor 250SE / 250SE2 Factory Service Manual, Page 21Get this manual
SPECIAL TOOLS Tool NoTool nameFunction Compression gauge Engine compression tester 90890-03081 YU-33223 This tool is needed to measure the engine compressionExtension 90890-04082 This tool is needed to measure engine compressionPocket tester Analog pocket tester 90890-03112 YU-03112-C This instrument is needed for checking the electrical systemTiming light Inductive clamp timing light 90890-03141 YU-03141 This tool is necessary for checking ignition timingValve spring compressor Compressor 90890-04019 YM-04019
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