Crash bungs tightness?

Craig321 · 20 May 2015 at 20:52

I've got some crash bungs I still haven't fitted - first time I tried I couldn't get the thing as tight as I wanted so put the engine screw back on and left it.

When I did have it on, even when holding the bolt with a spanner, the thing would move around. I could even move it round (as in spin it round) with my hand with a bit of force. Nothing loose enough that would cause it to move when riding though.

Is this normal? It does have the anti shake washer in there, so doubt it'd fall off, but not sure if being able to move it slightly is normal? I tried my Hornet ones, and can also move those round with a bit of force, but they're slightly different ones and I don't trust comparing my new bike to my ancient Hornet

The R&G manual says 40nm, but I couldn't physically reach that as it'd just move round and I have nothing to hold the thing properly without damaging it.

wazza300 · 20 May 2015 at 21:04

the rubber bit you mean? I doubt you'll ever get it to not move at all

it wont hurt if it rotates slightly

Craig321 · 20 May 2015 at 21:10

The main hard plastic bit that sticks out

benji182 · 20 May 2015 at 22:07

I have R&G crash bungs on my ZX6R and they move a little bit. Not freely but with a good grip you can turn them.

I assumed it was normal as can't tighten up any further

Kreeeee · 21 May 2015 at 08:28

Yes the r&g bungs are meant to rotate with decent force.

Drangueos · 21 May 2015 at 10:15

I had the same thought when I installed mines, they rotate if you force with your hand but they don't spin freely.

Dogbreath · 21 May 2015 at 14:16

Don't quite understand why you cant tighten the nut and bolt to 40nm? You'll probably need two sockets, but its got nothing to do with holding the actual plastic sliders. The bolt tightness is important if the sliders replace an existing engine mount, as mist r&g sliders do.

Craig321 · 21 May 2015 at 15:35

Ok, thanks all, at least the slight movement is right then (they don't move freely).

Dogbreath, yes, that's what I was a bit worried about, but I reckon I was close enough, it was just the movement of the crash bung putting me off, didn't feel right to leave them like that.

There's a bolt on the inside of the engine, so I hold that with a spanner and then torque up from the crash bung side, however the crash bung spins round when I get passed a certain tightness, even when holding the bolt. It's weird, almost feels like a stripped screw (it isn't).

Maybe I just need to give it another try.

acemastr · 21 May 2015 at 15:48

My Shogun ones spin if I spin them... so I don't spin them