head bolts

[11_FX4]

Im getting my head back soon and a few things I want to get in order before I get it. Can I reuse the stock head bolts or are they torque to yield? Also I have a manual but it has no torque specs as far as putting the engine back together, could someone be so kind as to give me the torque specs for putting a head and jug back on the engine? And finally where is everyone ordering the thin cometic gaskets for a 85mm bore?

P.S. I searched but probably not hard enough, the search pulls up old and I mean old threads that have no more pics or links that are dead

 

[bones]

29lbs on the 4 long ones and 14lbs on the 2 allen key bolts ... and i dont remember the specs on the one small bolt that holds the jug

gaskets : http://www.cometic.com/powersports.aspx

 

[rappy'97]

I tighten the head bolts to 32ftlbs, and get the allen heads as tight as I can.

 

[11_FX4]

Thanks guys

 

[11_FX4]

Ok one last question, I have lost two of the copper washers for the head bolts. Can I replace the copper with a steel washer or the same size and thickness?

 

['00 WO-YA!]

I wouldn't, get copper, the expansion rate is different & the copper will seal differently (if a steel washer sealed at all). Yamaha did that for a reason. Also you asked about reusing the bolts, always check bolts for stretch, usually when they need replacing it's obvious to see.

 

[11_FX4]

Thank you sir, didn't even think of them being there to seal

 

[duneracerweston]

yep yep neet to use copper there the headbolts are fluted because the are oil gallies and the oil flows to the head through there under pressure