Take the spec you need for the head bolts and any other bolts you might want to torque (like maybe a spark plug), and search the internet. I use a 3/8’s drive one that was left over from work. It’s scale is in inch/pounds. Recommend the type that you set the torque value by turning the end of the handle and the head clicks when the value is reached. Wouldn’t go over $100. A $50 one should be just fine. I saw a range in prices from $19 to $400. You don’t need the $400 variety and I’d stay away from the cheap beam type that has a pointer and a scale to read the torque values off of.
LAD Specialties customer / tony kart / rotax / kt100