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Z1-B engine mounting bolts

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steve452
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Z1-B engine mounting bolts

#1 PostAuthor: steve452 » Tue Aug 18, 2020 12:30 am

Reference to the workshop manual shows this (see pic, item 3) which I'm guessing is an error as I have 3 x M10 long bolts and 2 x M12 shorter bolts (with the teardrop fasteners). Am I right in thinking that the shorter 12mm bolts should have the higher torque figure and the longer 10mm the lower figure? If so, is 50 odd ft/lbs of torque against the teardrops going to damage the crankcases? Also, I'm assuming that when it says torque up the long bolts it means lock the bolt head and apply the torque to the locknut (to prevent the bolt shafts from twisting). Is this correct? Any advice most welcome as the engine is in the frame but not yet fully torqued up.
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Z1-B, 360bhp ZX1000NGF

90% of questions that begin "Why..." can be answered with "Because people are stupid."

Philippe
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Re: Z1-B engine mounting bolts

#2 PostAuthor: Philippe » Tue Aug 18, 2020 2:20 pm

Hi Steve

the M8 bolts need 2,5 Kg/m of torque, the M10 and M12 bolts need 4 Kg/m of torque. Don't tighten the two short M12 bolts to 7Kg/m of torque. It must be a mistake in the book
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Philippe
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steve452
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Re: Z1-B engine mounting bolts

#3 PostAuthor: steve452 » Thu Aug 20, 2020 6:55 pm

Many thanks Philippe. All torqued up now.
Now for the clutch :D
Z1-B, 360bhp ZX1000NGF

90% of questions that begin "Why..." can be answered with "Because people are stupid."


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