ok... someone explain this one to me then.

[Timmeh]

'lo chaps

got the shock of my life this morning during the 5-second walk-round to discover that the main exhaust -> frame mounting bolt was AWOL.

So would some care to offer any suggestions as to how an M10 bolt with both spring and tab washers and a nylok nut done up to 50ft/lb could possibly manage to detach itself from said bike?

concerned timmeh is concerned.

ta
____________________
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

[Aff]

Sheared and made its getaway?

Was it the original bolt? Has it been crashed?
____________________
Current Bikes:Honda 929RR Fireblade, Honda CD200 Benly (Project), Stomp Z2 140
Electric Bike Project

[map]

It had a falling out with the frame.
You probably didn't give it enough love and attention.
____________________
...and the whirlwind is in the thorn trees, it's hard for thee to kick against the pricks...
Gibbs, what did Duckie look like when he was younger?

[cluderayr]

Id certainly get it replaced darn quickly or you run the risk of shaking the whole exhaust off, by way of stress on the exhaust manifold studs to the block and that will be a mare to sort.

Rich

[Islander]

[Timmeh]

That's what I'm thinking too.

Bolt was OEM mild steel. Time for a new one.

When I first got the TZR I noticed the exhaust hanger was missing, so I made my own using a spare CBR one I had and cut it down to size. Thank fcuk I did, it's prolly saved the zorst from coming off and taking half the engine with it.

Vibration is a serious issue on this bike. The engine runs smoothly enough except at low revs, however the suspension is rock hard so checking nuts and bolts is a regular occurance. I blame Norfolk's shitty roads. I might even consider lockwiring things together now.
____________________
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

[Dave_R]

I reckon a sheared bolt too, possibly weakened by fatigue from a bumpy ride or engine vibration.

It happened to my CBF125 as I rode to the dealer to sort out other "quality issues". It noticed it when I hit a speed bump, heard a clunk as the exhaust pipe fell on the swing arm. I stopped and found half a bolt on the road with the nut still attached, couldn't find the head.

I bodged the pipe back on with zip ties I carry under the seat, consider carrying some if you don't already.

[Timmeh]

theory #3

over time the heat from the zorst has caused the nylon to melt causing the old nut to shake out.

Now it has a stainless M10 with an all-metal stover nut and a couple of washers.

That'll hopefully stay put!

Ta for the replies dudes

____________________
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

[Nexus Icon]

Tbh, a stainless bolt can be more likely to fail from the fatigue of vibration than a mild steel one if it's a lot harder.
____________________
Greetings from Shitsville!

[Ichy]

[paranoid] Someone was trying to steal the exhaust and got disturbed. [/paranoid].

It is now your duty to sleep with the bike to catch the culprit and use at least one of the suggestions made up by the BCF hard boys to hurt them.
____________________
https://www.metacafe.com/watch/1972097/how_to_behave_on_a_forum/

[Timmeh]

[Timmeh]

[Vincent]

I was going to say a disturbed tea-leaf too. Maybe keep an eye out
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Space Is Deep

[Old Git Racing]

2 stroke exhausts resonate with high frequency vibration. Is it the original pipe or a spannie. If its original bolt it up like it came from the factory, would probably have some kind of rubber bush, check a parts fiche. If its a spannie it should be spring mounted at the exhaust port with a rubber mounting further down.

OGR (not an expert but some experience)
____________________
2022 Tiger Sport 660 2019 Street Twin 2003 K3 gixxer 1000 1998 Srad 600 track hack

[Timmeh]

correct, the bolt fits through a rubber bush with a metal spacer inside. Which was still there, thankfully.


____________________
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

[Vincent]

Unless worn out completely, locknuts shouldn't come undone....... no matter how much vibration.
____________________
Space Is Deep

[c_dug]

Don't really deal with much high temperature stuff at work so no idea about the nylon melting but if that is a possibility could you replace the nyloc with an aeronut?
____________________
I am a bellend, I am a man of constant sorrow, I am a gummy bear, I am a rock.

[Aff]

Fairly sure the nylon from most Nyloc nuts can go up to about 250 Degrees.
____________________
Current Bikes:Honda 929RR Fireblade, Honda CD200 Benly (Project), Stomp Z2 140
Electric Bike Project

[Turkish]

Same thing happened to me today!

https://i.imgur.com/F9STs1A.jpg


Check out my Paddybodge!

https://i.imgur.com/luaBaDO.jpg


£30 for the parts from Honda! Bloody hell!
____________________
ZX-6R G2
CBR125R RW6

[Timmeh]

it's catching on!

there must be a small army of pygmys nicking zorst bolts.

take care peeps
____________________
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