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Anyone know the head bolt torque specs for a 1983 Yamaha Excel III 340, or where I can download a manual that would have them in it?
 

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You could go by bolt type and size. Typically an 8mm bolt is torqued to 13-20 ft-lbs for the 340-370 models. The Polaris, Arctic Cat and Skidoo service manuals all say 18 ft-lbs for the head bolts.
 
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Discussion Starter #3
You could go by bolt type and size. Typically an 8mm bolt is torqued to 13-20 ft-lbs for the 340-370 models. The Polaris, Arctic Cat and Skidoo service manuals all say 18 ft-lbs for the head bolts.
Thanks!
 
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