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Motorcycle Discussions => British Bikes => Topic started by: rick on February 28, 2015, 04:25:15 PM

Title: Torque settings
Post by: rick on February 28, 2015, 04:25:15 PM

Hi,
Anybody know what  the torque settings are for the following nuts on a BSA  L29 Sloper 350 cc engine.

Both shaft flywheel shaft end nut ( clutch side and timing gear side) cylinder base nuts, cylinder head to cylinder nuts.

Or is it a case of tighten to as tight as you feel right

Thanks

Title: Re: Torque settings
Post by: R on February 28, 2015, 10:40:13 PM

Quote from: rick on February 28, 2015, 04:25:15 PM

Or is it a case of tighten to as tight as you feel right

Its unlikely that BSA would have even owned a torque wrench back then (?),
so if no torque figures are quoted in the official bsa literature, your comment is about official policy.

There are charts of suitable torque figures for common bolt sizes, and these can provide a useful guide.
20 to 25 ftlbs for 3/8" bolts, perhaps a shade more if they are hi-tensile grades.
And (considerably) less for smaller bolts.

And, stripped threads and broken studs don't a reliable engine make, so tighter is not always better.
But if it can come loose and damage something,  it has to be tight enough.
Loctite can be useful insurance here.