Cat with no can

[finglonga]

RE Steptoe Mod - what is this?

Thx

Steptoe Mod

 

[Blackal]

Hey guys, not trying to put a damper on things, but I was in my local BMW shop today and the mechanic guy told me about a dude that had done this mod to his bike. they had to repair it -engine was totally fcuk'd. Holes in pistons etc.

This may have been a one off, I'm a louder the better person so good luck to everyone. I have to say it looks sweet!

Is there a better superlative than "sh1te" for the above?

I looked at that engine out of professional curiosity and there were few marks on the pistons, let alone holes.

So........... "not trying to put a damper on things........)

Stick to your particular field of expertise............


Al

(the best engineer in the world........ according to my mum )

 

[Blackal]

Just as well you can predict his overtaking by the sound, cos his indicators don't work and his hand signals are well dodgy

Al

Update on CC's engine...........

It can manage the usual "spirited pace" with two-up and all of Mrs CC's electrical heating panels.

Sound? the usual "snorty" sound (unless that was CC with a cold )

Al

(mum still thinks I'm the world's best engineer.......... but she is barking-mad)

 

[Coolcarbon]

... but she is barking-mad)

That explains ever so much....

 

[Yodagoat]

Glad to hear that the mod is pretty much safe.

I head that the pistons were shagged from a bloke I was speaking to, I never had a close look at the bike personally.

 

[cascat]

What size?

Just bumped this to the top again....

Lidl are selling end pipes for a fiver from today and I'm planning on replacing the 'stubby' pipe I've had on for a while.

Unfortunately I can't remember what the size is?....anyone able to advise?

I know I could just take the existing one off and get tape measure but I'm planning on calling in and getting a pipe on way home so any pointers would be appreciated on bore etc...seem to think it may have been something like 54mm

Thanks in advance

 

[stowei]

I measure the external dimension of the stubby pipe out of the cat at 44mm, which I found to be narrower than most of what I could bodge from other bikes, hence going custom.

 

[Packer]

Fitted a stub pipe from [email protected] to my 1150GS last wednesday and am pleased so far. Slightly more noise but it seems to breath easier and happily pulls one gear higher than previously at any given speed. Seems to have a bit more grunt as well. At first I thought it was vibrating a bit more, either I've got used to it or it's settled down.

Checked the plugs a couple of times and all appears to be well in the fuelling department. I'll do a few full tanks to check out he consumption

 

[Packer]

Happy with canectomy

About 6 weeks since I dumped the can and fitted a grubster stub pipe.

Bike is going really well and fuel consumption has dropped from an average of around 45-47mpg to around 51-53mpg. I don't even see the low fuel light until around 220-230 miles

Result

 

[ahebron]

So if I was to strip out my spare can and get a length of pipe bent up to the length of the muffler. Then insert this back into the can I would end up with a standard looking bike but a much sexier sound. I have come to the R1150GS from a 1986 R80G/S with a complete Staintune system that sounds oh so sexy. Still running cat on the 1150 with no plans on removing it.
Plus by doing this to the spare can I can always revert back to normal if need be. I can feel another project coming.

 

[iletts]

A note of caution........

Gents,

having degutted the cat and fitted a stub pipe in place of silencer, rang up insurers (NIG via BMW) to add modification, helpful lady asks:

how much has it increased value? answer - nil
how much has it increased power? answer - approx 5 bhp
is it kite marked? answer - no, but its not a silencer
was it purchased from a BMW dealer/ answer - no
is it an approved BMW modification? answer - no

I tried my best to explain that I was only doing this to enhance low speed driveability , but no way would they accept it.

At the risk of being called a big jesse, please check with your insurers, if you have/find one that will accept the modification, do tell

 

[Coolcarbon]

Not worried about mine to be honest....

It's just passed an MOT, again, with just the stubby pipe on.

I doubt if there is that much of a power hike, even if it were, it's hardly going to set the world alight at, as you claim, a 5bhp increase...

If anything safety has been enhanced... ,

I've got rid of a load of "Offcentre" weight and when touring, I now have two evenly matched Panniers too....

 

[iletts]

CC, if you were to come a cropper it could give your insurers an easy 'out' from paying up and possibly leave you open to being nicked for no insurance.

 

[Coolcarbon]

if you were to come a cropper it could give your insurers an easy 'out' from paying up and possibly leave you open to being nicked for no insurance.

I declared the previous 'y' piece and race can...no problems, so...this is, if anything, closer to the standard set up and legal as far as the MOT is concerned...

They would have to show how it may have contributed to any claim I'm involved in......they couldn't ......

I'm happy that it wouldn't cause a problem..

 

[ahebron]

Right I did my previously mentioned mod. I took the spare muffler and dismantled it. Unbolt the end cap and the mounting bracket tap the input end with a soft hammer and you have the bare muffler in your hands. Next I attacked it with a fine cutting blade on the angle grinder opening it up along the flat face. Inside is an input pipe, a transfer pipe with holes and an outlet pipe plus a wrapping of wire wool. The nasty part was cutting out the transfer pipe as it is in the centre of the muffler but perserverance and a good supply of cutting wheels saved the day. Now you end up with an open can and an input and output pipe, the output pipe has an extension which will slide off with force and a touch with the grinder. I went to the local stainless steel supplier and bought a 316 45mm right angle bend which was cut and welded after making a template to look like a stretched 'S', in and out parallel. Lay this over the existing pipe work and mark where to cut then weld all in. To fit the new piece in sections of the side of the muffler had to be cut out. The finishing job of welding all the bits cut from the side of the muffler back to it took the most time with a touch from a sanding disc to smooth it off. A few taps with the hammer and it slid back into the original shiney housing, bolt the end cap and mounting bracket on and it is all looking good.
Fit it to the bike and it sounds nice and powerful, not to loud but a definite throb and it looks bog standard plus I have saved 1/2 kilo in weight.
I know I should go and buy a Remus or such Y piece and can but I kind of like the idea of the cat trying to keep the air that little bit cleaner for us all. An hey this was dirt cheap to do all it cost was a stainless bend and lunch for my welder mate.

 

[diversion74]

Ubend looks great but I have a few questions.

Can this be done on a 1200 without any problems?

Does the pipe/ubend need to be a certain length or shape to give some sort of back pressure? (silly question probably but just want to make sure)

Is it just a case of visiting my local exhaust manufacturer (one down road) and getting him to knock me a ubend up.

How will plod look on this should he look the bike over? (ride a lot with power rangers who do get pulled over for plates, cans etc.)

Thanks in advance.

Andy

 

[jimbo]

I declared the previous 'y' piece and race can...no problems, so...this is, if anything, closer to the standard set up and legal as far as the MOT is concerned...

They would have to show how it may have contributed to any claim I'm involved in......they couldn't ......

I'm happy that it wouldn't cause a problem..

Err, I'm not lawer, but I don't think thats right. If you have failed to disclose something relevant then I think they can refuse a claim.

If I failed to disclose that I had been banned for drinking and driving, then I expect they would refuse a subsequent claim. Arguing that it wasn't the reason for the accident wouldn't help much.

The insurance company may have decided that people who change exhausts are more statistically likely to ride fast and/or have accidents. Not having an E marked Exhaust is illegal?

I recall one chap who's claim was refused because his 4x4 had a front bull bar. It was fitted by the dealer before he bought it. Insurnace co viewed it as a failure to disclose.

 

[Coolcarbon]

Err, I'm not lawer, but I don't think thats right. If you have failed to disclose something relevant then I think they can refuse a claim.

If I failed to disclose that I had been banned for drinking and driving, then I expect they would refuse a subsequent claim. Arguing that it wasn't the reason for the accident wouldn't help much.

The insurance company may have decided that people who change exhausts are more statistically likely to ride fast and/or have accidents. Not having an E marked Exhaust is illegal?

I recall one chap who's claim was refused because his 4x4 had a front bull bar. It was fitted by the dealer before he bought it. Insurance co viewed it as a failure to disclose.

Of course failing to declare a conviction for drink drive is going to negate your claim...

The Exhaust (Cat) is E marked and the Exhaust system as is, passed the MOT last month...so, tell me again as to how me being knocked off my bike by Mr Magoo would have been affected by the stubby exhaust....

You may wish to roll over and be shagged by your insurance company if they say that it was a contributing factor, not this guy...and as for riding faster...on a GS 1150 with a stubby exhaust.... you're kidding, aren't you..

Besides, I've done it to allow me to balance my luggage with same sized panniers on both sides of the bike...which of course contributes to a safer ride... !

Don't you think that there are a lot of Urban Myths surrounding Insurance claims ....I heard loads of stories, umpteenth hand but no one I know has ever said to me I've been shafted because etc etc...

I don't ride fast anyway....just don't slow down much, there is a distinct difference...

 

[diversion74]

No one tried them on a 1200 then?

 

[charleyfarly]

Great Exhaust mate

Hi Ya
Love your exhaust, where did you get it from or is it hand made?

regards

Charleyfarly