400ex torque specs

[CGriff]

Hey guys I am having difficulties find some specific torque specs.. I'm looking for torque specs for the 27 mm nut for the bottom cam chain sprocket, the clutch case cover bolts, cylinders bolts, and valve cover bolts.

[REDRIDDER]

27mm nut =65ft-lbs
clutch cover bolts=7ft-lbs
cylinder head cover bolts=17ft-lbs
cylinder head cap nuts= 33ft-lbs
cylinder head mounting bolts= 33ft-lbs
cylinder studs=15ft-lbs

[CGriff]

Thx for the quick reply... you dont happen to know the torque specs for the clotch sping bolts do u?

[drew416ex]

Originally posted by REDRIDDER
27mm nut =65ft-lbs
clutch cover bolts=7ft-lbs
cylinder head cover bolts=17ft-lbs
cylinder head cap nuts= 33ft-lbs
cylinder head mounting bolts= 33ft-lbs
cylinder studs=15ft-lbs

Actually if you notice in the description for the cylinder head cover bolt it is for the center 8mm one. The 6mm ones (The rest of the small ones) are are 9 Nm or 80 in-lb. 17 foot pounds is over torqued.

As for the spring bolts, is it a 6mm hole, or 8mm hole. If its a 6mm hole, then its 12Nm or 106 in-lb. If its 8mm hole, its 27 Nm or 20 ft-lb.

[CGriff]

Actually the center bolt is a 12mm bolt and the smaller ones are 8mm. The clutch spring bolts that im talking about are 10 mm bolts. Not really sure went you meant about the 6 or 8 mm holes, maybe you can fill me in.

[drew416ex]

when torque specs are talking about 6mm 8mm 12mm etc., its talking about the actual hole size, not the head that the wrench fits. For instance, the small valve cover bolts with the 8mm head are a 6x1.0 mm thread. Torque specs go mostly by this size, not the size of the head.

[REDRIDDER]

according to my clymer manual the cylinder head cover bolt (8mm)= 17ft-lbs.

[drew416ex]

thats correct, but its for the one in the center, not the smaller ones with the 8 mm head.

[REDRIDDER]

ok thanks for clearing this up :)