Tank Slap - Motorcycle Forum

[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!

No idea. It does sound like thick plastic.

How many miles have you got on the clock.

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

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

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

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

Maybe the gasses are hotter so cause it to crumble?

Kwacky wrote: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.

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

Deegee wrote:

Kwacky wrote: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)

duke63 wrote: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.

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.

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

Kwaks are known for that tight front sprocket.

Glad it's all sorted.

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.

Monty wrote: 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.