Collapsed CAT or Lego bricks

[Monty]

[video]https://vimeo.com/181301209[/video]

I've not ridden the bike for over 3 weeks and so far only taken the can off and had a look in the baffle box.

The bike is going into the garage on Monday for it's first chain and sprockets, I'm not doing the first front sprocket change on a Kwak. So thinking I might get them to take the headers off and knock out the CATs while it's in. Or just retrieve the Lego bricks!

[Kwacky]

No idea. It does sound like thick plastic.

How many miles have you got on the clock.

[Monty]

About 8k now, it started a few weeks after I fitted the can

[Kwacky]

Weird. The CAT shouldn't have fallen apart so soon.

[Monty]

I've found one example of it happening on the Internet, and strangely it happened just after he'd fitted an aftermarket can.

I hope it is the CAT, they were coming out this winter anyway and was going to fit a pinebox

[Itchy]

Do a massive wheelie down the road, hoefully the Lego will just fall out!

[Kwacky]

Maybe the gasses are hotter so cause it to crumble?

[Deegee]

Maybe the gasses are hotter so cause it to crumble?

Cats do get very hot, iirc the early 675's had a problem with them overheating and deforming which led to partial blockage of the exhaust and a fair bit of power loss, the engines ran weaker with an aftermarket can (less back pressure), and a weak mixture is a hotter mixture - adding to quicker cat failure.

[duke63]

Did you remove the exhaust valve and disconnect all the cables when you changed the exhaust?

[Monty]

Maybe the gasses are hotter so cause it to crumble?

Cats do get very hot, iirc the early 675's had a problem with them overheating and deforming which led to partial blockage of the exhaust and a fair bit of power loss, the engines ran weaker with an aftermarket can (less back pressure), and a weak mixture is a hotter mixture - adding to quicker cat failure.

That's what I was thinking (hoping)

[Monty]

Did you remove the exhaust valve and disconnect all the cables when you changed the exhaust?

No still there and connected, it's built into the Akro. First thing I checked, took the can off and it's fine.

Dropping it off at the garage this lunch time.

[Monty]

Garage phoned and there's something loose and rattling around behind the CATs. They are knocking them out as we speak, can't wait to hear what it sounds like.

[Monty]

Sorted, the first CAT had come loose and was rattling on the second one. Sounds much better now and loads of pops and bangs

So glad I didn't try and fit those new sprockets, theres no way I could have got the front sprocket off. Their own impact driver couldn't budge it and they had to borrow one off the Snap-On rep

[Kwacky]

Kwaks are known for that tight front sprocket.

Glad it's all sorted.

[duke63]

I bet that spent 1 minute fishing out a lego brick and then charged Monty for a few hours labour to remove the offending CAT.

[D41]

So glad I didn't try and fit those new sprockets, theres no way I could have got the front sprocket off. Their own impact driver couldn't budge it and they had to borrow one off the Snap-On rep

You can't just use a cheater bar to take it off??

Well....not now, but you know what I mean.