2006 Arctic Cat ATVs 400/400TBX/400TRV/500/500TBX/500TRV/650H1/650 V-Twin Service Manual, Page 215Get this manual
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Measuring Connecting Rod (Big End Width)
Disassembling
3 Zero the indicator and rotate the crankshaft slowly
1 Remove drive gear #2; then remove the circlip securing the rever