main cat removal

talon440 wrote:has anyone removed the cat in their exhaust, i punched it out with a long screw driver about 3 mths ago and could feel the difference especially pulling out of slow corners and pipe sounds better also, still have my secondaries in place and my bike is smooth to ride, can drop to 40kph in 6th and still pull away easly even with a 40 tooth rear sprocket, can also say the dog is much happier now the cat is gone

Hammy wrote:Just buy a set of headers.

madmax wrote:

Hammy wrote:Just buy a set of headers.

If I did that I wouldn't be able to come up north.

Seriously though I'd like to keep it looking half legal

Hammy wrote:

madmax wrote:

Hammy wrote:Just buy a set of headers.

If I did that I wouldn't be able to come up north.

Seriously though I'd like to keep it looking half legal

Did mine look illegal  ??  Of course it didn't.  Do you see cats on Harleys ?  Maybe some pussies at times.

talon440 wrote:removed the muffler and intermediate pipe and you can see the cat then remove the o2 sensor so you dont damage it then get a long screwdriver and hammer and keep breaking it up and sucking the bits out with a vacuum cleaner, there is a steel tube that surrounds the honey comb material so dont try and get that out as its a very tight fit, after you think its all out start the bike up and rev it to get any more bits out, then refit the o2 sensor and the rest of the exhaust and its done, took me about 4 hours all up just took my time and it costs nothing and you cant tell is not there from the outside

madmax wrote:

Hammy wrote:Just buy a set of headers.

If I did that I wouldn't be able to come up north.

Seriously though I'd like to keep it looking half legal

NTBill wrote:

madmax wrote:

Hammy wrote:Just buy a set of headers.

If I did that I wouldn't be able to come up north.

Seriously though I'd like to keep it looking half legal

I think you'll find that the ADRs don't actually mandate emission standards for mobikes. While we (Orstralia) harmonise with UNECE standards, there is a small anomaly with mobikes (unlike those other 4 wheel monstrosities we share the roads with) that means removing the cat may not be the heinous crime that some enforcement people would like to have us believe. Why are the emission control systems there? Because the bikes are manufactured for international markets where emission control is mandated. Australia is about 1% of the global vehicle market. We are small fish in a big pond. I would suggest anyone challenged on it (emission systems removal on a mobike) is being challenged under section B of the Act. (Bluff). Happy to be proven wrong. But I'm pretty sure I'm not. Remove away. Let the beast breathe.....enjoy.

gus wrote:Its a right pain , just when you think its all out you find another section .Still ,it costs nothing .





So, just how much of a pain?  A mild irritation or hammer through the shed wall type of pain?

I bought some Harley mufflers to go onto my Vulcan and took the cats out of them. The stuff a catalytic converter is made from is pretty tough. I was lucky. The Harley mufflers were straight and I fabled up an extra long core drill to suit and just drilled the core out. It still took me ages and lots of cursing. I can't imagine doing it with a screw driver.

Bosco15 wrote:Sometimes I will buy parts for my bikes, but only if I can't make it, scrounge it or modify the original part to do the job I want. The original headers look like the only real restriction is the cat, so I don't think that I can see my way to forking out for Arrows if I can get the cat out with a few hours of swearing.  
I do like your description Gus. I have felt that way a few times about some jobs that didn't go to plan.                                                                                                                                                                                                                                    if you use a srewdriver with a good flat blade on it, attach a set of vice grips to the handle and punch the screwdriver through the middle or close to it with a hammer and keep turning the srewdriver each time so you actually make a hole, just keep punching it through till it comes out the other side turning the srewdriver as you go, once you have that first hole right through it gets easier as you keep making that hole bigger

Hammy wrote:The cat is not the only restriction. Take a look inside your headers.  They are double walled !  The inside diameter is tiny.  That is restriction.


Well. That is bloody sneaky. 
I was well prepared to stick with the monster muffler and de cat the headers,  but this changes things. 
It's so frustrating when you get a performance motor that has been choked. Can't remember which bike but one had washers welded inside the headers as restrictors. 
Bloody Greenies!

crimsondawn wrote:

madmax wrote:

NTBill wrote:

madmax wrote:

Hammy wrote:Just buy a set of headers.

If I did that I wouldn't be able to come up north.

Seriously though I'd like to keep it looking half legal

I think you'll find that the ADRs don't actually mandate emission standards for mobikes. While we (Orstralia) harmonise with UNECE standards, there is a small anomaly with mobikes (unlike those other 4 wheel monstrosities we share the roads with) that means removing the cat may not be the heinous crime that some enforcement people would like to have us believe. Why are the emission control systems there? Because the bikes are manufactured for international markets where emission control is mandated. Australia is about 1% of the global vehicle market. We are small fish in a big pond. I would suggest anyone challenged on it (emission systems removal on a mobike) is being challenged under section B of the Act. (Bluff). Happy to be proven wrong. But I'm pretty sure I'm not. Remove away. Let the beast breathe.....enjoy.

You might be right, but at this stage I can't afford to change headers and there is the other problem of aftermarket headers don't yet suit the GSX without cutting into the fairing.

If you want a challenge, the Delkevic headers have been modified now to suit the GSX.



Well that's good to know, maybe I'll wait until I can afford them and keep the stockies standard