2006 Arctic Cat Y-6/Y-12 50cc and 90cc Service Manual, Page 41Get this manual
ATV-1011A
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4Place spring retainer over the valve springs; then using the valve spring compressor, compress the valve springs and install the valve cotters
2Using calipers, measure the outside diameter of the front bushing in the movable drive faceMeasurement must be equal to or greater than minimum specifications
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3Using calipers, measure the drive belt widthMeasurement must be equal to or greater than minimum specifications