Had my first real breakdown. Guts...

[CB ARGH]

Struck some bad luck today!

On a ride heading to Kaitaia for the night via Dargaville. Was riding along and all of a sudden felt and heard a clunk, it felt like the trans or chain so threw in the clutch and pulled over. Oil pissing everywhere, all over the rear tyre and road.

The front sprocket bolt was sitting ontop of the chain guard, all torn up. Looks like damage to the trans or sump. Won't know for sure until I get it home and remove the fairings. And yes the sprocket had been torqued to what the manual said.

Insurance company doesnt want to hear about it. Fully insured however no cover for anything mechanical.

Looks like an expensive repair and a long time off the road.

Still, couldve been much worse if the rear wheel locked!

Here's a pic.

https://ibb.co/gvGAJv

[Moise]

Sorry to hear that. It's good that the rear wheel didn't lock though.

There is usually some kind of lock washer to prevent this from happening.

Sent from somewhere using Tapatalk

[Autech]

Glad you stayed on board mate, many haven't before you...

Did it have the crush washer on it?

[CB ARGH]

Yes everything was put on properly and I've done at least 15,000km since the change. Chain has always been cleaned and lubed properly every 500 odd km. Also has just got a new set of tyres 200km ago so the chain and rear wheel was aligned correctly by a Cycletreads mechanic.

[CB ARGH]

https://www.youtube.com/watch?v=xVEWRcJ2q6o

I've uploaded a video of it. Unfortunately there's no sound but you can see the bike shake just before I pull the clutch in and pull over.

[R650R]

Yes everything was put on properly and I've done at least 15,000km since the change. Chain has always been cleaned and lubed properly every 500 odd km. Also has just got a new set of tyres 200km ago so the chain and rear wheel was aligned correctly by a Cycletreads mechanic.

When my GSXR750 was still brand newish at 27,000km I had the grey code sensor for the speedo unthread itself from the output shaft by front sprocket. Being made of metal its prongs quickly cracked the sprocket cover case on which the sensor for the speedo was fitted. The sensor shifted slightly and gave false speed readings, slower than what it should for current revs. I thought F@#$%, clutch is slipping, so I nursed it back from atiamuri to HB with least amount fo horsepower and throttle use. Was repaired quickly once I knew what it was next day, was enough meat in other bolt to mount sensor in correct place.
Then it wa s asix month battle to claim a new cover under warranty which now sits as a trophy in the shed.

[Tigger79]

Struck some bad luck today!

On a ride heading to Kaitaia for the night via Dargaville. Was riding along and all of a sudden felt and heard a clunk, it felt like the trans or chain so threw in the clutch and pulled over. Oil pissing everywhere, all over the rear tyre and road.

The front sprocket bolt was sitting ontop of the chain guard, all torn up. Looks like damage to the trans or sump. Won't know for sure until I get it home and remove the fairings. And yes the sprocket had been torqued to what the manual said.

Insurance company doesnt want to hear about it. Fully insured however no cover for anything mechanical.

Looks like an expensive repair and a long time off the road.

Still, couldve been much worse if the rear wheel locked!

Here's a pic.

https://ibb.co/gvGAJv

Bad luck. Good to hear that you're unhurt.

[CB ARGH]

https://ibb.co/hwRmaa

So finally got the bike back. Looks like the front sprocket nut has come loose and wedged itself around the chain ripping at part of the engine.

Any idea where I'd get these parts to the engine?

[nzspokes]

Looks like the gearbox case is toasted. If its not a bolt off part then in all reality its new motor time.

And locktap the sprocket bolt next time.

[R650R]

https://ibb.co/hwRmaa

So finally got the bike back. Looks like the front sprocket nut has come loose and wedged itself around the chain ripping at part of the engine.

Any idea where I'd get these parts to the engine?

Step one -SupercheapAuto, $17.99 JB Weld epoxy resin
Step two- sell bike on trademe

[HenryDorsetCase]

Bad luck.

To fix it properly it looks like a motor out, split the cases down to the castings, then either source a new casting or repair the one you have. Presumably it can be done but I have no idea by whom or how.

The JB Weld solution probably will not work in the presence of oil - at least it never has for me. I did have some success with it many years ago on a stator cover on a CB750: but I took it off the bike and cleaned it of oil residue then put the JBW on it.... then found another stator cover.

Good luck with it.

[Askor]

That seems to be THE place for R6's to crack/break when something fucky happens with the chain. I'd say it'd be repairable by a skilled TIGger if you still have the broken off bit, but that's complete engine strip-down territory. Alternatively, brakeclean the area really well, and JB Weld the broken off bit back on. It should be fine as long as there's NO oil on/in the break's surface...

[CB ARGH]

Thanks for your input guys. I've taken the engine out of the bike and it appears to be the entire trans section that is effected. Where the damage is it isn't just a simple plate that can bolt off it's the entire trans section. I'll take it to a mechanic to get it looked at but looks like for the effort and time involved it may just be easier to purchase a complete engine and salvage the current one.

[R650R]

Bad luck.

To fix it properly it looks like a motor out, split the cases down to the castings, then either source a new casting or repair the one you have. Presumably it can be done but I have no idea by whom or how.

The JB Weld solution probably will not work in the presence of oil - at least it never has for me. I did have some success with it many years ago on a stator cover on a CB750: but I took it off the bike and cleaned it of oil residue then put the JBW on it.... then found another stator cover.

Good luck with it.

I was being funny. Yes JB is plausible as a get you home form an adventure fix but would never try sell bike like that....

[Moise]

Yes everything was put on properly and I've done at least 15,000km since the change. Chain has always been cleaned and lubed properly every 500 odd km. Also has just got a new set of tyres 200km ago so the chain and rear wheel was aligned correctly by a Cycletreads mechanic.

Really sorry to hear about the damage.

The lock washer normally has a couple of tabs that you bend against a flat on the nut. If that's done well, ususually with a hammer and drift, then the nut can't come off even if it loosens. I've had this happen - bent the tabs back and the nut was finger tight.

Seems a bit of a coincidence that this happened 200 km after a new tyre was fitted.

Sent from somewhere using Tapatalk