Force shift, transmission damage

[dave100]

While stretching I accidentally pushed down on my shifter and shifted from 2nd to 1st.

Throttle was open to maybe 3-4000 revs and heard a clunk as it shifted down.

I heard some rattling for the next 10minutes commuting and then it stopped.

What should I do? How damaged are the dogs

[Akzle]

How damaged are the dogs

if you're anything like c*ssina, they're proper fucked.

[FJRider]

Drain the oil ... and see how much metal comes out with it ... <_<

[Honest Andy]

Drain the oil ... and see how much metal comes out with it ... <_<

Yep +1
Hard to believe you did anything toooo serious at those revs if you were just tickling along having a scratch
But check the drained oil carefully for lumps...

[T.W.R]

Drain the oil ... and see how much metal comes out with it ... <_<


Yep +1
Hard to believe you did anything toooo serious at those revs if you were just tickling along having a scratch
But check the drained oil carefully for lumps...

Any broken piece substantial enough to make an audible rattle in the engine whilst running wont come out when you drain the oil :oi-grr: the sump plate will have to come off.
For the scenario of the cause though it's just like an inadvertent clutchless downshift and at the revs shouldn't have done any damage apart from buffing up some metalware

[FJRider]

Any broken piece substantial enough to make an audible rattle in the engine whilst running wont come out when you drain the oil :oi-grr: the sump plate will have to come off.
For the scenario of the cause though it's just like an inadvertent clutchless downshift and at the revs shouldn't have done any damage apart from buffing up some metalware

If there's big(ish) bits ... there's a pretty good chance of little bits.

But hey ... what's the worst that could happen ... with a few bits of metal loose in the gearbox ... ??

[T.W.R]

If there's big(ish) bits ... there's a pretty good chance of little bits.

But hey ... what's the worst that could happen ... with a few bits of metal loose in the gearbox ... ??

Either way if there's big bits or small the sump will have come off ;)

I've dealt with motors that have been absolute messes internally and the only thing that came out the drain bung was oil that looked like liquid metal and the sump pan when removed looked like the catch tray for a lathe, and the big items were still in the area they came from. Most of the galleries aren't big enough to let larger objects through so they stay captive in the chamber where they parted company

[Honest Andy]

Either way if there's big bits or small the sump will have come off ;)

I've dealt with motors that have been absolute messes internally and the only thing that came out the drain bung was oil that looked like liquid metal and the sump pan when removed looked like the catch tray for a lathe, and the big items were still in the area they came from. Most of the galleries aren't big enough to let larger objects through so they stay captive in the chamber where they parted company

Indeed.
Still, if the oil is clean (no grit or silvery sheen) and the backstory is honest I'd be inclined to just refill the oil and give it a run. If something broke on an accidental downshift at gentle power then the box is already poked, do you reckon? (I do clutchless changes quite often on purpose, when my old knuckles start to seize up) Maybe the noise is down to elevated senses after doing something unexpected? :scratch:

Anyway, I feel a weekend project coming up...
Go Dave :niceone:
We'll be here all weekend for advice!

Well, some of the weekend, it's looking quite fine so I may be out of cov_rage a_ea for mos_ _f __e tim_ :scooter:

[Grumph]

Either way if there's big bits or small the sump will have come off ;)

I've dealt with motors that have been absolute messes internally and the only thing that came out the drain bung was oil that looked like liquid metal and the sump pan when removed looked like the catch tray for a lathe, and the big items were still in the area they came from. Most of the galleries aren't big enough to let larger objects through so they stay captive in the chamber where they parted company

Generally true...But we never found the half piston and top end of the rod missing when we blew a CB750 in a speedway TQ....

And when Holden blew the BMS Ducati at Ruapuna there were bits of piston flew into the pits...

This guy has only minor damage. No one's let the dogs out.

[T.W.R]

Indeed.
Still, if the oil is clean (no grit or silvery sheen) and the backstory is honest I'd be inclined to just refill the oil and give it a run. If something broke on an accidental downshift at gentle power then the box is already poked, do you reckon? (I do clutchless changes quite often on purpose, when my old knuckles start to seize up) Maybe the noise is down to elevated senses after doing something unexpected? :scratch:


Who knows?? without seeing it in the flesh one can only make assumptions and the best approach is prepare for the worst and be relieved when things aren't as bad as expected.
I clutchless shift the majority of the time due to mainly riding with one arm and resting my munted left on the tank, do it often enough and it isn't an issue in either direction.


Generally true...But we never found the half piston and top end of the rod missing when we blew a CB750 in a speedway TQ....

And when Holden blew the BMS Ducati at Ruapuna there were bits of piston flew into the pits...

This guy has only minor damage. No one's let the dogs out.

I've got the remnants of a XR250 piston that ended up sitting in the sump after the engine handgrenaded itself...looks like it spent time getting thumped by an english hammer :lol:
Saw plenty of interesting things at Chappies dealing with cockies and their dam bikes, that's where you see the full extent of abuse & neglect and the results caused by thus....pisses you off to see how brutal some of the pricks can be :mad:

[nodrog]

While stretching I accidentally pushed down on my shifter and shifted from 2nd to 1st.

Throttle was open to maybe 3-4000 revs and heard a clunk as it shifted down.

I heard some rattling for the next 10minutes commuting and then it stopped.

What should I do? How damaged are the dogs

Only 10mins? Sweet its fixed itself.