2001 Arctic Cat ATVs factory service and repair manual, Page 231Get this manual
Fig3-860
Measuring Connecting Rod (Big End Width)
1Using calipers, measure the width of the connecting rod at the big-end bearing2Acceptable width range is 17.95-18.00 mm (0.707-0.709 in for the 250300 cc, 25.95-26.00 mm (1.022-1.024 in for the 400 cc, and 24.95-25.00 mm (0.9822-0.9842 in for the 500 ccMeasuring Crankshaft (Runout)
1Place the crankshaft on set of blocksCC290D
2Maximum diameter is 17.040 mm (0.6709 in for the 250300 cc, 21.04 mm (0.8283 in for the 400 cc, and 23.04 mm (0.9070 in for the 500 ccMeasuring Connecting Rod (Small End Deflection)
2Mount dial indicator and base on the surface platePosition the indicator contact at point of the crankshaftFig3-862
1Place the crankshaft on set of V-blocks and mount dial indicator and base on the surface platePosition the indicator contact point against the center of the connecting rod small end journal2Zero the indicator and push the small end of the connecting rod away from the dial indicator3Maximum deflection is mm (0.12 inMeasuring Connecting Rod (Big End Side-to-Side)