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De-catting & MOT

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ADSrox0r
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PostPosted: 22:06 - 24 Nov 2014    Post subject: De-catting & MOT Reply with quote
What's the crack with de-catting and MOT then? Is it my single-malt befuddled brain or do I remember some new shit about it now?
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Wafer_Thin_Ham
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PostPosted: 22:06 - 24 Nov 2014    Post subject: Reply with quote
Nothing has changed yet as far as I know.
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stevo as b4
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PostPosted: 23:37 - 24 Nov 2014    Post subject: Reply with quote
I wasn't sure that bikes until recently have been emissions tested to see if the Cat is working?

De-catting any performance engine allows you to run a more power and throttle response friendly air/fuel ratio, so performance and drivability are often much better with no cat in the system. De-catting should be done at the same time as fitting a performance non road legal system for maximum gains IMO.

As for MOT's well my old Rover 220 has a de-cat pipe fitted, and passes it's MOT just fine (at a friendly garage! Wink ) It runs way to rich for a cat to survive so having one is not an option.
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Rogerborg
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PostPosted: 23:40 - 24 Nov 2014    Post subject: Reply with quote
No problems.

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Nash GT
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PostPosted: 04:33 - 25 Nov 2014    Post subject: Reply with quote
In most cases depends on how anal/unfriendly your chosen MOT station is.
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Rogerborg
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PostPosted: 09:41 - 25 Nov 2014    Post subject: Reply with quote
NashGT wrote:
In most cases depends on how anal/unfriendly your chosen MOT station is.

Does it now? When you say most, how big is your sample set? How many fails and passes are you using for comparison?

Here's the exhaust system section of the motorcycle MOT test manual.

Or perhaps it's in the fuel section.

Can you point out the part about catalytic converters that an anal/unfriendly MOT tester could use to fail you?
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Copycat73
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PostPosted: 10:28 - 25 Nov 2014    Post subject: Reply with quote
my R1 has been de-cat for some time .. never have I had a gass test applied to a bike and the testin station has the equipment .
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Matt B
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PostPosted: 11:10 - 25 Nov 2014    Post subject: Reply with quote
Rogerborg wrote:
Can you point out the part about catalytic converters that an anal/unfriendly MOT tester could use to fail you?


This ^^^

De-Cat is not an issue as long as the exhaust is "complete,secure and not too noisy".

Read all about it here in an easy to understand pamphlet from the nice men at VOSA:

https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/219090/your-motorbike-and-the-mot.pdf
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Wafer_Thin_Ham
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PostPosted: 12:04 - 25 Nov 2014    Post subject: Reply with quote
Copycat73 wrote:
my R1 has been de-cat for some time .. never have I had a gass test applied to a bike and the testin station has the equipment .


That stuff is for cars, not us.
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Stowelly
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PostPosted: 12:09 - 25 Nov 2014    Post subject: Reply with quote
Matt B wrote:
Rogerborg wrote:
Can you point out the part about catalytic converters that an anal/unfriendly MOT tester could use to fail you?


This ^^^

De-Cat is not an issue as long as the exhaust is "complete,secure and not too noisy".

Read all about it here in an easy to understand pamphlet from the nice men at VOSA:

https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/219090/your-motorbike-and-the-mot.pdf


how do they determine "not too noisy" ?
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Aff
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PostPosted: 12:11 - 25 Nov 2014    Post subject: Reply with quote
Stowelly wrote:

how do they determine "not too noisy" ?


Think it depends how rough the testers night was.

I have mine done at a council test center and always get an advisory for loud exhaust.

Even I would call my exhaust excessively loud, but it's never been failed for it. Laughing
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Stowelly
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PostPosted: 12:30 - 25 Nov 2014    Post subject: Reply with quote
Aff wrote:
Stowelly wrote:

how do they determine "not too noisy" ?


Think it depends how rough the testers night was.

I have mine done at a council test center and always get an advisory for loud exhaust.

Even I would call my exhaust excessively loud, but it's never been failed for it. Laughing


Ah I see, The previous MOT's that came with my bike all had the same advisory, but surprised me on my first MOT with it that it wasnt even mentioned (it has no baffles and is fairly loud)
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Copycat73
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PostPosted: 14:07 - 25 Nov 2014    Post subject: Reply with quote
Wafer_Thin_Ham wrote:
Copycat73 wrote:
my R1 has been de-cat for some time .. never have I had a gass test applied to a bike and the testin station has the equipment .


That stuff is for cars, not us.


its a gass analyser are you sayin its totally unfeasible that it be used on a bike application... even though the law does not require it at this point in time ?
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Nash GT
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PostPosted: 15:14 - 25 Nov 2014    Post subject: Reply with quote
Rogerborg wrote:
NashGT wrote:
In most cases depends on how anal/unfriendly your chosen MOT station is.

Does it now? When you say most, how big is your sample set? How many fails and passes are you using for comparison?

Here's the exhaust system section of the motorcycle MOT test manual.

Or perhaps it's in the fuel section.

Can you point out the part about catalytic converters that an anal/unfriendly MOT tester could use to fail you?


Simply as various MOT stations I have been to DO NOT BOTHER with an emission test on bikes.

Weather is right or wrong is not for me to tell em off.
I trust you have never come across a test centre that is determined to fail your car/bike for what ever reason/s they can find regardless how trivial/relevant
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P.addy
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PostPosted: 15:47 - 25 Nov 2014    Post subject: Reply with quote
Copycat73 wrote:
are you sayin its totally unfeasible that it be used on a bike application... even though the law does not require it at this point in time ?


I am saying yes, take a decent 2 stroke up there and watch it fuck his kit.
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LustyLew
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PostPosted: 16:45 - 25 Nov 2014    Post subject: Reply with quote
VOSA wrote:
If you think your motorbike;

Has been incorrectly passed:
Let us know as soon as possible.


Yeah, right!
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Nash GT
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PostPosted: 16:49 - 25 Nov 2014    Post subject: Reply with quote
_Iain_ wrote:


Sir is avoiding the question.

There is no emmissions test for motorcycles in the MOT manual, therefore in testing it you'd be performing some random test that doesn't represent part of the MOT & you'd loose your MOT licence for failing the vehicle because of a failiure to pass the testing standards you've made up.

It IS your place to complain if an MOT is unfairly failed or passed and there are processes to do just that. I.e you can complain if you buy a vehicle with a suspected dodgy MOT, and you can complain if your vehicle is unfairly failed.


Fair enough fellas, I must admit that I am fairly new to bikes, my first two were 1 new and one 1yr old, current bike came with a year's ticket on it.
So haven't experienced the 2 wheeled MOT experience my self, just observed a couple while waiting for the motor a few times.
I based my info based on my cager experience and was clearly mistaken feel free to deal some more Butthurt.

Regarding the other point I have seen cars handed back with advisories such as "unable to test seatbelts as child seat/s fitted"
While the punter was waiting during the test.
Things like that is what I call anal, all beit is not a fail it is an unnesessary advisory as the customer was present and could have removed the child seat.
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Last edited by Nash GT on 10:46 - 26 Nov 2014; edited 1 time in total
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Nash GT
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PostPosted: 16:51 - 25 Nov 2014    Post subject: Reply with quote
LustyLew wrote:
VOSA wrote:
If you think your motorbike;

Has been incorrectly passed:
Let us know as soon as possible.


Yeah, right!


This could be useful if you buy a motor with "a years ticket" issued within the last 5 days for instance and it is an absolute death trap that would have never passed an mot legitimately.
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Nash GT
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PostPosted: 17:34 - 25 Nov 2014    Post subject: Reply with quote
Suck s to be in that situation, but as you say has to be put down to experience
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Wafer_Thin_Ham
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PostPosted: 17:35 - 25 Nov 2014    Post subject: Reply with quote
Copycat73 wrote:


its a gass analyser are you sayin its totally unfeasible that it be used on a bike application... even though the law does not require it at this point in time ?


No, not at all.

What I said in short words was "At the moment the motorcycle MOT makes no requirement regarding an emissions test, whereas the car one does my good sir. " Thumbs Up
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Kickstart
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PostPosted: 22:16 - 25 Nov 2014    Post subject: Reply with quote
Stowelly wrote:

how do they determine "not too noisy" ?


MOT testers opinion. And he could be deaf

_Iain_ wrote:
If they change the law then everything pre-introduction of said law will stay as it was beforehand won't it?


Probably not. Likely that if they bring it in then it will apply emissions limits based on what the vehicle should have produced when new. This is what happened when emissions testing was introduced for cars.

Quite possible that if there was external evidence the cat had been removed then that would be a fail as well.

All the best

Keith
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mudcow007
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PostPosted: 22:18 - 25 Nov 2014    Post subject: Reply with quote
do they start engines now for an MOT?
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Old Thread Alert!

The last post was made 11 years, 135 days ago. Instead of replying here, would creating a new thread be more useful?
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