drilled exhaust

I'm sure this has been on loads before. I don't want to and cant afford to change the stock exhaust. I have had holes knocked in  the baffles.  But want it deeper so if I drill holes in the back plate will that fail the MOT.

It won't fail the engine. Maybe give a bit less backpreassure at the most.

If you want deeper sound, just drilling the backplate doesn't do much, you need to punch a hole through one or two plates on the middle, if you want it deeper, there's a video linked about it in this thread (and also some other stuff about drilling the baffles):

https://www.suzuki800.com/t2738-holes-in-exhaust-end

Of course removing the baffles alltogether is another story...but this was enough for me.

rdt1157 wrote:

...will that fail the mot.

That Sir, depends on the MOT tester.
I've had my bike MOTd with Jardine Rumblers on...and these puppies are hitting 100db+

Best of luck with the quest for perfect sound.

Would it make deeper sound if i wouldnt drill holes and just punch the plates in the middle?

Thanks

Go to YouTube and search for Honest Abe mod.
You'll find sound comparisons from each stage...from drilling holes to punching through the plates.
Hearing is believing..so to speak.

I know. But all videos have drilling first and then punching

Yes Marko center punching the holes will be fine on its own, drilling the back plates as well will make next to no difference after doing that

Unfortunately the only way to get a really good exhaust tone is to replace the stock exhaust with an aftermarket system, which I am fully aware cost a lot of money. You may need to bite the bullet to get the result you are looking for.

I agree that stock pipes will never be sounding as good modified in any way as a descent aftermarket pipe but we dont all have the money to buy them and have to look at what we can afford instead. They can sound better modified than a aftermarket exhaust depending on what you are looking for tho as there are so many different sounds and extremes of sounds that aftermarket pipes depending on who is listening to them can sound shit. No point in finding the negative things, just look at the most positive from the situation your or anyone is in at the time

Which we all need to remember that not everyone has and as you want to quote yourself I will do the same.

Lowey wrote:

Unfortunately the only way to get a really good exhaust tone is to replace the stock exhaust with an aftermarket system

I will also do the same for what I wrote

Captain Crash wrote:

They can sound better modified than a aftermarket exhaust depending on what you are looking for tho as there are so many different sounds and extremes of sounds that aftermarket pipes depending on who is listening to them can sound shit. No point in finding the negative things, just look at the most positive from the situation your or anyone is in at the time

I love the sound of some aftermarket pipes and hate some other and I would rather have a modified pipe than some of the aftermarket pipes I have heard

I rode behind an Intruder yesterday with the best sounding pipes I have heard in a long while. They were stock to look at and gutted I would imagine. Drilling holes can make them a bit louder/deeper. However modified pipes can look a bit DIY. Wide open pipes, aftermarket or gutted stockers with a fuel processor probably give the best sound. Baffled pipes are probably more common and not quite so loud or deep. If you are prepared to spend, top of the range after markets are probably the best it gets. However, having spent hardly anything on modified Intruder pipes, I know from experience how great they can sound. Stockers do look a bit oversized but if I had to choose only one attribute, I would choose sound rather than looks. The Intruder is not a dear cruiser so even with after markets you can still have a great sounding motorcycle for reasonable dosh even if you put on the 
very best exhaust. Aftermarket or modified stock, you will find all the info you require by searching the archives of this excellent forum - you will find nowhere better to get Intruder advice.

It just goes to show we all have different views on the way we like things, there's no wrongs or rights.
Just a matter of personal preference.

Maybe it does Jeff but the fact remains that Ron has asked for help & clearly said that he can't afford to change from stock. So surely we should respect the question for what it is, there is no point telling someone to spend cash they do not have & clearly said they do not have.

rdt1157 (ron) wrote:

I don't want to and cant afford to change the stock exhaust. I have had holes knocked in the baffles.  But want it deeper so if I drill holes in the back plate will that fail the MOT.

If you have already put a spiked rod down the pipes & knocked a hole through the 2 internal plates there will be no advantage to drilling holes in the end plates. Exhaust gases/noise is no different to water, in the sense that it will take the easiest route & that route is already being used by the exhaust gases/noise to escape the pipes if you have knocked the holes through the two internal plates.

Mr intruder, I do fully respect everybody's input on this forum, my thread is purely an observation, if it came across as trying to tell him  to spend money he  hasn't got, then I apologise for any misunderstanding that may have been caused.

Sometimes members spend more than they had planned because the modifications and upgrades suggested on Suzuki 800 are such bloody good ideas. 

get a long length of thread start with 8mm you should be able to go up to 12mm I think, anyway I've gone up to 10mm before and liked that sound was not really loud when ticking over but when on the road if you gave her a handful or quick acceleration it was plenty loud enough best ov both worlds really. I think the thread was about £3 a meter so I bought 8mm and 10mm even if you fancied going up to 12mm this mod aint gunna break the bank and makes a big difference make shore your length of thread is long enough to go through all plates in the stock exhaust sharpen one end on a angle grinder get a club hammer and gently bang it all the way down job done take it for a ride see wat you think then go 10mm if you want so on. the good thing about using thread is that once you bang it through all the plates if it's feeling stuck you can just use mole grips to twist it out like a bolt.
think I've dribbled on long enough hope it may be ov sum help

That's a good way for members to do it with threaded bar Morgan, very cheap.   

No worries Jeff.   

John many people spend money because of idea's that they see on here & that's great. However we must give an answer to the question that someone has asked, especially when they have been very specific in saying that they "don't want & can't afford" other options.

We also should be careful not to turn a specific thread within the modification section into a bloated thread of unnecessary words that becomes neither use nor ornament to the thread starter.

The thread starter asked a question about the MOT in relation to holes. Well Ron, If you want to be 100% certain just ask a tester before the test if it will pass - if he says no, go elsewhere. The current regs are ambiguous by stating 'any perforations will fail the visual inspection' but giving the tester 'discretion as to what he thinks is too loud' so it would appear the law is an ass! Also, as Crash pointed out above, there is little point drilling backplate holes for a deeper sound if you already have one down the middle, if anything it will go more raspy (mine did). I hope that has addressed both the points you raised in your post.

I made a disc and used some Black silicone to cover the holes I had drilled in mine last week. i have the first baffle knocked out. It really quietened it down. I have been doing some reading about back pressure vs velocity of the exhaust and horsepower. I am thinking if I close the holes and go ahead and knock out the second baffle it will have more or  less a straight flow. It will still have the Cat. Converter for some back pressure.What do y'all  think.
The way they mounted the Original exhaust on my Trike there isn't an easy way to change the exhaust where it will look good.

Proudtexson wrote:

I made a disc and used some Black silicone to cover the holes I had drilled in mine last week. i have the first baffle knocked out. It really quietened it down. I have been doing some reading about back pressure vs velocity of the exhaust and horsepower. I am thinking if I close the holes and go ahead and knock out the second baffle it will have more or  less a straight flow. It will still have the Cat. Converter for some back pressure.What do y'all  think.
The way they mounted the Original exhaust on my Trike there isn't an easy way to change the exhaust where it will look good.

I asked my local bike guru almost the same question recently - he has been professionally modifying exhausts for years. He said with FI there comes a point when the ECU can't really be expected to cope on its own and some kind of fuel processor is required. He did say that the bike would probably tell you if it was unhappy, at least if you don't run it for more than a few miles fairly wide open. My view would be give it a whirl - if the bike runs smoothly, then it's probably ok, but I'm no expert rather trial and error type of guy. If the hole you pierce is not full bore I recon there will be sufficient back pressure.

I have a Fi2000 Pro installed. And K&N filter

Proudtexson wrote:

I have a Fi2000 Pro installed. And K&N filter

Give it a go then Tex - right through to the cat if it were me! I did my Intruder stock pipes like that and they sounded great!

Tex the Fi2000 Pro will cope with what ever you chuck at it, thats what it is designed to do

captain crash wrote:

Tex the Fi2000 Pro will cope with what ever you chuck at it, thats what it is designed to do

  Just look at my Intruder  

For what its worth heres my standard pipes which have been opened up, I started with the drilled end plates but wasnt happy so bit the bullet and used the hole saws to cut the end plates out and then a sharp pointy thing to knock the baffle plates through.

The pic


And the sound




To take advantage of the sound use pc speakers or headphones for full effect as if your laptop speakers are as crap as mine it wont sound very good at all, slap on some headphones to fill ya head with it !!! lol

Jim.

my stock pipes had drilled end plates and baffles knocked thru by previous owner, never had a problem with MOT station and sound great.

Yep mine just went through no probs with the cans emptied as above !!!

Jim.

Sounds great Jim.   

I will use you video in the database if that's OK.

It would be an honour to have my vid immortalised in the history books of the VL800 !!!

Jim

Good sound Jim,well in m8.

Just seen this in the Video data base, Flippin ace