Task: Question Generation
Input (English): Context: We are selling my wifes atv this week . She has n't ridden it in two years so we decided to sell it and buy a two up machine instead . Two years ago a piston skirt broke off cracking the case and bent a rod , at that time I decided to rebuild the machine as it was used quite often until then . So we sent the motor off to a very reputable mechanic for a rebuild , this is when we found out the case was cracked and the entire motor would have to be replaced .
Output (English): Why did the narrator opt to rebuild the machine ?