CLUTCH SPRINGS-how tight?

[stirlinggaz]

Hi all,
im puting a clutch & engine back together.
the manual states a torque value for the center nut but not for the 4 bolts that compress the clutch springs.
the 4 bolts push a plate down on top of the springs, compressing them, just like any other clutch, lol
but how much should i tighten them?
till the springs are fully compressed?
the manual states, just to tighten them in a criss cross pattern, but doesnt tell me how tight to do them up!
cheers,
GAZ

[stinkwheel]

Assuming they are M6 bolts, around 7.5fl/lb should be about right.

This is not very tight, on a "by hand" torque wrench about same as "just nipped up and no more" after they're screwed fully home.
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[stirlinggaz]

oh dear, i've tightened them up as much as i can,lol
my torque wrench starts about 20nm, i think.
guess i should loosen them off a bit then?
think there m5 or m6 x 25mm.
so the springs shouldnt be compresssed much then?
cheers,
GAZ

[binge]

The springs should be compressed as far as the bolts will screw in.
They need screwing all the way in, But once they are there, Just nipped up.

After all, They are effectively held in place by the compression of the springs.




Ben

[stirlinggaz]

thank-you.thats exactly what i have done.
means i dont have to remove the 10 clutch case bolts, AGAIN.
cheers,
GAZ

[finpos]

Contrary to the above, the clutch springs do a fantastic job of loosening off the bolts if they are not done up tight enough. If you find you're adjusting the clutch far more often than you ought to be doing, take the cover off and marvel at the loose bolts. And the snapped clutch basket, it you are unlucky.

f.

[Timmeh]

I successfully managed to wreck an NTV clutch by a) not tightening to the correct torque and b) not using threadlock.
____________________
GSXR400 x2 | '94 RVF400 | '93 TZR125 4DL (again)
20:22:30 BLUEX5: i would love to be forced to undergo a**l plugging with different sizes
20:48:18 Temeluchus: comp you hunk of smouldering homos3x you

[stinkwheel]

Well most manuals quote 85 inch/pounds for M6 clutch basket bolts. This equals 7ft/lb or 9.6Nm.

ie, not very tight at all.
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[stirlinggaz]

f*ck!
this has got me worried now!
originally i had them tightened up till the springs were fully compressed & wouldnt tighten down any more.
then, after thinking about it, i loosened them off a bit.
now i dont know wether to go back in & tighten them up & put some threadlock on....
might just leave it till the engines in the bike & see how it feels,
cheers,
GAZ

[finpos]

Stupid double post

[finpos]

Sounds bad - when you tighten them up, you will eventually compress the springs to the point where the posts that the springs go over are butted up against the pressure plate, so you are getting solid contact and now you can properly use a torque wrench (i.e. you are not trying to torque up against the springs, which would be nonsense). If you've loosened them from that point, I guarantee they will wriggle themselves out again once you start using the engine.

f.

[stirlinggaz]

hi,
now im confused..... (easily done, lol)
so i should tighten the 5 bolts all the way?
compressing the springs completely?
i have a torque wrench, but the manual doesnt state how tight they should be.
you think i should just tighten them right back up? (AGAIN! lol)
cheer,
GAZ

[finpos]

in a word, yes! you should be able to feel when the plate bottoms out against the posts, then torque it up - the figure above should be fine.

It's my opinion that people (I include myself in this!) don't do those bolts up tight enough because they are trying to torque them up while the clutch basket is flopping about for lack of a proper clutch holding tool - this throws any torque wrench readings or practiced nipping up.

f.

[stinkwheel]

[Vincent]

I'd be very carefull NOT to overtighten them, I've seen a lot of them tightened so much that they have snapped of the lugs