Author Topic: Exhaust Options?  (Read 5837 times)

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NJ750K1

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Exhaust Options?
« on: July 06, 2006, 11:28:49 AM »
I'm in the process of updating my old CB750K1 and I'm looking into options for the exhaust. I've got the original 4 into 4 pipes on it and I love the way they look. My understanding is that they're not the best option performance-wise. Are there any other options (custom 4 into 4, 4 into 2, etc...) that maintain this look better than the 4 into 1? When I rebuilt the engine (about 8 years ago), I went 10cc's overbore in each cylinder and had the valves re-seated.

By the way, I've been reading this board for a few weeks now and found it very useful. I've already got a pair of Progressive 12 series on the way for the back-end and have received a set of repro side covers from JC Whitney. The side covers seem like nice quality and do include the appropriate hardware to mount.

I'd like to go with the four K&N cone look, but I doubt if I'll see any performance benefit without changing the exhaust.

Thanks,

Brian

Offline ProTeal55

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Re: Exhaust Options?
« Reply #1 on: July 06, 2006, 11:44:56 AM »
Everyone has a different opinion when it comes to Exhaust systems...

I have a 4 into 2 exhaust on my scoot, and am happy with it thus far. I drilled out the baffles as big as I could go, and am still looking for alittle more sound. I am either gonna replace the stock mufflers with some automotive bullet types, or just get a 4 into 1 with a big-ol-can on the end of it. I am a big believer of the "LOUD PIPES SAVE LIVES" motto.

Some pics of my setup can be seen in my gallery , link is below.....
Joe a.k.a ProTeal55 a.k.a JoeyCocks a.k.a Maker of Friends

Offline TwoTired

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Re: Exhaust Options?
« Reply #2 on: July 06, 2006, 01:02:23 PM »
I depends on where you want your power boost.
Four into one has the potential to make higher peak power up near redline, as the exhaust pulses/velocity from one cylinder's exhaust has a scavenge effect on another's exhaust cycle.  However, the pulses also spoil the exhaust flow at lower RPMs (such as cruise).  If you like downshifting for power and operating at high RPMs, this is your choice.  This option gives your power peaks at RPMs near redline.

Four into two systems particularly with the 2/3 crossover have the potential to improve lower RPMs (such as cruise), but don't have the added scavenge effect at very high RPMS or exhaust velocity.  Throttle twist response on the open road can be better than a four into one.  This option makes your power band broader at the expense of some potential peak power near redline.

Four into four systems have the best Low, mid, and high RPM performance balance with respect to engine power output.  Power pulses and their reflections can be tuned to provide an added scavenge effect at the exhaust port at high RPMs for a performance boost.  Not quite as peaky as a 4 into 1, but good.  Their are no adjacent cylinder pulses to spoil (or aid) exhaust flow at lower RPMs. However, four mufflers and mounting brackets weigh more than 1 or 2 bigger mufflers, so overall weight of the bike can be higher.  Added weight reduces acceleration and nimbleness in the corners.

Oh, and since the soap box is vacant.  I'm a big believer in the
"LOUD PIPES INDUCE RESTRICTIVE LEGISLATION ON MOTORCYCLISTS" motto.  As well as greater animosity toward motorcyclists in general and loud pipes have NEVER saved a single life in the history of 2 wheeled vehicles.

Such noise does NOT belong in any residential area.  But, is absolutely wonderful at racing or other appropriate venues where people choose to hear such things at their desire, not someone else's forceful intrusion.

Have a peaceful day,

Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

Those that learn from history are doomed to repeat it by those that don't learn from history.

Offline ProTeal55

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Re: Exhaust Options?
« Reply #3 on: July 06, 2006, 01:12:58 PM »
Oh, and since the soap box is vacant. I'm a big believer in the
"LOUD PIPES INDUCE RESTRICTIVE LEGISLATION ON MOTORCYCLISTS" motto. As well as greater animosity toward motorcyclists in general and loud pipes have NEVER saved a single life in the history of 2 wheeled vehicles.

Such noise does NOT belong in any residential area. But, is absolutely wonderful at racing or other appropriate venues where people choose to hear such things at their desire, not someone else's forceful intrusion.
TWOTIRED --->
I am not gonna argue this and hijack this thread. But think about it this way. Would you rather be riding your bike and have some lady turn into you because she didn't hear you , or have her flick you off because your bike was "too loud". Atleast with the flick-off she noticed you were next to her..I am not saying to run open headers, but a nice exhaust tone might just save your life someday. Also scares away potential living speedbumps (animals).

Thats my opinion ,and many others....
Joe a.k.a ProTeal55 a.k.a JoeyCocks a.k.a Maker of Friends

NJ750K1

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Re: Exhaust Options?
« Reply #4 on: July 06, 2006, 01:38:21 PM »
I'm going to be using this bike for commuting into the city and cruising with a passenger on the weekends. Given that, it sounds like maybe I can get away with sticking to the four into four and taking a swipe at tuning it. As I'll have this in Manhattan, I definitely subscribe to the loud pipes being good theory. It always amazes me that pedestrians will walk right in front of my car, but scatter when they hear a motorcycle coming.

On the K1, are there any baffles to be dealt with on the stock exhaust? Also, any thoughts on replacing the stock mufflers with something else? A friend of mine recommend four straight pipes, but I'm not too sure that's a realistic option. He drag races muscle cars, so I'm thinking that his advice might be ill conceived for motorcycles.

Offline dusterdude

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Re: Exhaust Options?
« Reply #5 on: July 06, 2006, 01:45:43 PM »
im of the opinion that people that dont like bikes just dont like bikes,if it aint loud pipes it will be something else.
mark
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Offline TwoTired

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Re: Exhaust Options?
« Reply #6 on: July 06, 2006, 02:29:57 PM »
TWOTIRED --->
I am not gonna argue this and hijack this thread.

Despite your pleas to the contrary, you already have!

But think about it this way. Would you rather be riding your bike and have some lady turn into you because she didn't hear you , or have her flick you off because your bike was "too loud". Atleast with the flick-off she noticed you were next to her..I am not saying to run open headers, but a nice exhaust tone might just save your life someday. Also scares away potential living speedbumps (animals).

Thats my opinion ,and many others....

Complete, contrived BS.  In my opinion, and most of the nation, as well.

-->PROTEAL55<---
As a motorcyclist, it is your responsibility to survive and avoid any stupid action by another on the highway.  If that is not your primary task on two wheels or any vehicle on the highway, then STAY AWAY from all vehicles.  However, would you rather that lady turned into you BECAUSE your pipes were annoying them (having previously received no satisfaction from simply flipping other loud piped motorcyclists off)?  They can still use the "I didn't see him" ploy that will hold up in a court of law despite your illegally loud exhaust pipes.  Would you rather have loud pipes on your motorcycle, or big wheels on your wheel chair?
Would you rather they passed legislation banning ALL modifications to motorcycle exhaust systems or enforced a strict db limit restriction and inspection fee on all motor vehicles because a few beligerant miscreants persit on disturbing the peace wherever they go?

Haven't you noticed that you don't hear the loud pipes until the bike is well past you and any others that may factor in a traffic incident?  Pedestrians have a completly different outlook and awareness regarding motor vehicles than operators of motor vehicles.   If safety is your concern why don't you route your pipes so they dump sound in front of you?  Why haven't you put LOUD HORNS on your bike to warn everyone of your impending arrival?

I LIKE the sound of load pipes.  But, not when I'm sick in bed with the flu or other ailments and I'm just trying to concentrate on healing.  At these times, I look longingly over at the scoped Casull and imagine 1800 Ft lbs of energy in a .454 area of a motorcycle engine block.  That kind of noise could be most pleasing, indeed.  The silence afterward... priceless.  But, I only imagine these things, and continue to suffer through arrogance and rudness of people with loud pipes.

I appolgize for the thread hijack.  But, sometimes you just gotta smack someone who won't fall in line with popular good sense opinion.... Oh wait, that's a thread in the open forum, isn't it?  Nevermind!
 ;D

Have a peaceful day,
Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

Those that learn from history are doomed to repeat it by those that don't learn from history.

Offline 750goes

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Re: Exhaust Options?
« Reply #7 on: July 06, 2006, 02:46:43 PM »
TT PMT?

PROTEAL ANTIPMT?

SCREW THE THREAD  ;D

Offline ProTeal55

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Re: Exhaust Options?
« Reply #8 on: July 06, 2006, 03:06:45 PM »
Consider this a hijack...
TINTIN ----->
This started because YOU didn't agree with what I had to say regarding loud pipes.
Why you can't just take an opinion for what it is, an opinion ?

PROTEAL likes loud pipes, OK , next topic....
Simple as that...

But no, you have to go write a full page report knocking me down , to make yourself look better in members eyes..
If I choose to run NO PIPES on my bike , then I can do that because it is MY BIKE.
I am a firm believer that you are better off on a motorcycle that makes SOME kind of noise, then a silent one. I have a friend who has a bone stock Honda VTX1800 and you cant even tell the thing is running when he is next to me at 45mph. If you want I will give you his cell #, and you can ask him yourself how many times people have turned right into him because they couldn't hear him their. I dont know about your road conditions , but around Chicagoland, you better be on a bike that makes some noise, or else you are toast..
People like you and GEETO67 try and win people over with your motorcycle "knowledge", instead of just giving your opinion, and walking away from the keyboard.

These message boards are just that, opinions. When some asks the question of which exhaust he should go with, he is asking for opinions to make up his mind on what he wants to do, not the TINTIN answer, which you seem to think is law ?  ::)
I will continue to voice my opinion all over this board, as well as everyone else should.

I guess from now on I will run all of my advice/help/opinions thru you first , to get your approval before I post it on this message board. ::)

Joe a.k.a ProTeal55 a.k.a JoeyCocks a.k.a Maker of Friends

Offline DME

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Re: Exhaust Options?
« Reply #9 on: July 06, 2006, 03:16:45 PM »
I´m with you on this one, Proteal.
It doesn´t have to be "straight pipes"-loud but some noise is a good thing....

But I suppose the "Tintin"-references you´re making is slightly wrong, isn´t it TwoTired you´re discussing with?

Cheers
Daniel

RSV12K

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Re: Exhaust Options?
« Reply #10 on: July 06, 2006, 04:03:57 PM »
TT, you don't agree? You're wrong. When you get out of the hospital, drop me a note.

Offline ProTeal55

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Re: Exhaust Options?
« Reply #11 on: July 06, 2006, 09:02:38 PM »
Wow TINTIN , Looks like two other members agree with me, and my loud pipes...

Wow... :o
Joe a.k.a ProTeal55 a.k.a JoeyCocks a.k.a Maker of Friends

Offline Dumbgumby

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Re: Exhaust Options?
« Reply #12 on: July 06, 2006, 09:07:09 PM »
I may be a noob, but I am not an ignorant old man that thinks that loud pipes have NEVER saved a life in the history of two-wheeled vehicles. I am sorry but you are 100% wrong even if it is just an opinion it's wrong.  

By the way, I figure most noobies look up to an intelligent guy like you with your immense knowledge of motorcycles in general, so please tell us, why do you have to be suck a f'n jerk?     :-\
Ride fast and take chances

Offline TwoTired

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Re: Exhaust Options?
« Reply #13 on: July 07, 2006, 12:10:31 AM »
Hmmm, lets review.
Original post asked about exhaust options for performance.

Reply one: from Proteal55, ignores the performance aspect but promotes loud as a beneficial aspect with opinion slogan stated as fact. Then says: "Look at my bike!"

Reply two: (twotired) discusses performance aspects re: the original question (gee, I thought it was a technical forum), but balances the prior opinion injection with a contrary opposing opinion presented in reply one.

Reply three: Proteal slaps around TwoTired for having a contrary opinion, and implies his opinion is more important and he is a representative of the masses.  Here begins the argument.

Reply Four: NJ750K1 ttries to get back to the original topic.  I'm truly sorry it hasn't worked out better that way.  You just never know what you'll get in a forum.

Reply Six: TwoTired, picking up the gauntlet thrown down in reply three, and recognizing BS when he reads it, rebuts the argument of Reply three.

Reply Eight:  Poor TINTIN gets lambasted for no good reason.  I begin to wonder if there is some kind of substance abuse or a vendetta from a prior discussion.  However, assuming enraged fingers simply mistyped the moniker, I still have to wonder why PROTEAL55 can't follow his own advise.

Why you can't just take an opinion for what it is, an opinion ?

PROTEAL likes loud pipes, OK , next topic....
Simple as that...

What?  Contrary opinions can't be allowed?  Why can't you just take an opinion for what it is, an opinion ?
TwoTired doesn't like loud pipes on street vehicles. Rationale given.  OK, next topic.  Simple as that. 
But no, we get Reply # 3 instead.

Quote
But no, you have to go write a full page report knocking me down , to make yourself look better in members eyes..
You know my "reports" are always long winded.  I'm not trying to knock you down, only to have you realize the folly of your recently posted opinion.  Or, if you are so intransigent, at least retard the spread of that folly.  You took it personal.  But, you made it that way by singling out my contrary (to you) position.
Further, I hardly think I need to knock you down to "look better in members eyes".  Never my intention anyway.  If my posting record doesn't speak for itself, discussions or a typingfight with you will hardly matter.  I believe you are making up contrivances to garner sympathy.  If it works, you deserve the followers you seek.

Quote
If I choose to run NO PIPES on my bike , then I can do that because it is MY BIKE.

Quite right, as long as you keep it in your garage.   But, when you operate that bike on public roads, in public areas, you are required to comply with laws, regulations, and local ordinances.  Most locales have noise ordinances pertaining to vehicle emissions. I have personally received tickets for LOUD mufflers in Barrington and Itasca.  So, I know Illinois is not immune from these.  You are cited at officer discretion. Here are but a few examples of such ordinances and restrictions:
http://www.nonoise.org/lawlib/cities/cities.htm
There are also Federal standards for noise emissions from vehicles.  Technically, any noise increase due to modifications to stock exhaust is illegal.  It is not strictly enforced.  But, I believe if it becomes a widely perceived problem by motorcyclists and/or non-motorcyclists, it will be strictly enforced.  These laws, ordinances, etc., are, by definition, supported by the majority populace, making any loud pipe advocate in the minority.  When a minority gets boisterous enough, and perturbs enough of the majority, the minority is most often forced into submission.  I really don't want to see that.  But, I can understand when it happens.

Quote
I dont know about your road conditions , but around Chicagoland, you better be on a bike that makes some noise, or else you are toast..

I've driven motorcycles in Illinois cities, and California highways and cities for a lot of years.  I've had loud pipes and quiet pipes.  Cages will kill you indiscriminately, regardless of noise.  I've had people look straight at me, total eye contact, on a bike with loud pipes and RPMs at 7K, then change lanes right toward me.  It is human nature to only see what you are looking for.  In traffic, in a car while thinking about work issues, the kids dental exam, the mortgage payment due date, that blemish on your arm, the low fuel indication, you glance over your shoulder to see if there is another car.  Seeing none, you change lanes... into a motorcycle OR a TRUCK!  You didn't SEE them, because you were not looking for a motorcycle or a truck only another car.  This is a basic human factor, that loud pipes will NOT change.  Learn to deal with it, or become a statistic.

Quote
These message boards are just that, opinions.
I would like to think that at least SOME of the posts in the Tech Forum are based on Knowledge, experience, and facts, rather than simply opinions.  At least, I try to introduce something other than my opinion on occasion.

However, if the Tech Forum is now Re-defined as opinion only and non-factual, I'll be getting a lot more of my projects done rather than posting or reading here in the future.  It will always remain true that the reader has to weed fact from fiction.  I rue the day when it all becomes bragging and weeds.

RSV12K,
Your sincerity and concern is touching.  Unfortunately, your extensive and well posed arguments have failed to persuade me toward your viewpoint.  But rest assured, I will continue to give it all the attention it deserves.

Dumbgumby,
Quote
I may be a noob, but I am not an ignorant old man that thinks that loud pipes have NEVER saved a life in the history of two-wheeled vehicles. I am sorry but you are 100% wrong even if it is just an opinion it's wrong.
 

The fun thing about the word never is that it only takes one documented example to disprove it.  You're presented example among them.  People get hit by trains who never heard the bellowing horn.  But, your loud pipes will get everybody's attention in their secure little cages and save your life.  Must be nice in your fantasy world. 

Quote
By the way, I figure most noobies look up to an intelligent guy like you with your immense knowledge of motorcycles in general, so please tell us, why do you have to be suck a f'n jerk?

Wow, a compliment and derision in the same sentence. As well as another persuasive argument to consider for your selected side.  That fact that you think I and the vast number of people in this world are jerks, probably says more about you than it does me.  You've hurt me deeply.  Feel better now?
Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

Those that learn from history are doomed to repeat it by those that don't learn from history.

Offline oldbiker

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Re: Exhaust Options?
« Reply #14 on: July 07, 2006, 12:44:14 AM »
Rolls-Royce cars are known to be the best cars in the world because of their quiet power. To me a quiet powerful bike is the ultimate. (except on the race track) I'm with you TT.

Offline clarkjh

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Re: Exhaust Options?
« Reply #15 on: July 07, 2006, 03:28:39 AM »
I don't believe in the "Loud Pipes Save Lives" either.  They're just noise makers, exactly the same as what some do to their cages.  Yeah, you get noticed more, but if the driver is going to pull out, they still will because they don't perceive your speed as well as if you were in another cage.  I had more then my fair share of cars pull out in front of me when doing 65 MPH and 110,000 pounds.  If I want to hear loud pipes I will go to the races, I don't want the noise in my yard.

James
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Offline SteveD CB500F

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Re: Exhaust Options?
« Reply #16 on: July 07, 2006, 04:47:36 AM »
Well Brian (NJ750K1), you certainly started something here.

If you'd like to get the thread back to performance, let me know and I'll delete all this crap.

Oh dear, now I've expressed an opinion...

Let's just say I get depressed when a perfectly simple question goes off at a tangent and forum members start insulting one another.
SOHC4 Member #2393
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All modern bikes now gone...

Offline SteveD CB500F

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Re: Exhaust Options?
« Reply #17 on: July 07, 2006, 04:49:03 AM »
PS.

My 500/4 has stock pipes which are reasonably quiet.

My VFR has a Micron race can...  ;D  (and you think an inline four sounds good...)
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Offline dusterdude

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Re: Exhaust Options?
« Reply #18 on: July 07, 2006, 05:15:19 AM »
whether or not ya`ll like loud pipes or not,i can testify to the fact they do work.
mark
1972 k1 750
1949 fl panhead
1 1/2 gl1100 goldwings
1998 cbr600 f3

Jim Shea

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Re: Exhaust Options?
« Reply #19 on: July 07, 2006, 05:19:51 AM »
Noise or not????
It tends to be the noisier the pipe the less restriction that there is on the exiting exhaust gases. However, noise alone will not improve performance. You would need to do something to the inlet valves to increase performance which in turn would require exhaust valve porting of some sort!!
I must say i like a decent noise from an exhaust, a mate of mine has a Marshall deep tone, completely legal and non offensive, I have a Motad no real noise to speak of but probably perfectly tuned for the performance of the bike...
Jim.

Offline byidesign

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Re: Exhaust Options?
« Reply #20 on: July 07, 2006, 06:34:53 AM »
Here in the northeast {connecticut}
    They {Legislature} is trying to pass a
    noise law "for bikes only" {see CMA.org"}
   {ct. motorcycle Assn. } and click on legislation.....
     Two warnings for noise violation,and your registration
       is CANCELLED!!!!!!!  no day in court......proceed
       directly to WALKING......
       from complaints  of too many LOUD machines......
      I will not disagree ,that being heard could save
      a crash, but the non biking public doesn't like it.
        and unfortunately, we are now fighting to just
        keep our place on the road......hope it doesn't
           happen where you are....
            what we do effects others, and eventually can
           kick our own BuTT.......
                 thanks for the listen..
                             Bruce
       
82CB650SC,80CM400

Offline ProTeal55

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Re: Exhaust Options?
« Reply #21 on: July 07, 2006, 06:46:23 AM »
TINTIN -->
I see you can use the quote feature, good job...

You guys are acting like I am running a pro-pipe on my bike with no mufflers what-so-ever...
I am running a FULL 4 into 2 exhaust which is much quieter than most of the people on this board who are running 4 into 1 cannons..I would like the bike to be alittle louder than it is , for my own taste, but I am not out to have the loudest bike in town (The HD guys take that award ::))

No matter who says what, no matter how much legal bull#$%* TINTIN posts, I still believe that a bike that makes some kinda noise is just that much safer to ride then one that is silent. I am all about complying with city & state noise laws, as I don't wanna hear every HD with a new exhaust ripping down my street. I have dealt with getting pulled over for years in my past race/muscle cars, and have learned that a quiet exhaust can be nice, and still make power. But, on a motorcycle, I feel that I would actually be willing to loose alittle power to gain alittle noise, and then gain some "safety"..Their is a difference between "sounds good" & "obnoxious" , which I am well aware of.
« Last Edit: July 07, 2006, 10:50:56 AM by ProTeal55 »
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Offline clarkjh

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Re: Exhaust Options?
« Reply #22 on: July 07, 2006, 09:07:00 AM »
When I was given my first 550 a long time ago it had a 4 into 1 with nothing in the muff.  I built my own out of a steel roller and plate.  It did bark, but only under Hard excelleration, wisper quite when just crusing.  I don't know the performance specs for it but it worked real nice.  I plan on building a new 4 into 2 or even a 4 into 4 in two or three years.

James
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Offline cafehonda

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Re: Exhaust Options?
« Reply #23 on: July 07, 2006, 01:26:48 PM »
You know what loud noise I hate the most: screaming, whiny kids. I find it irritating, but not surprising, that so many people can waste time trying to legislate the momentary inconvenience of my Hindle highpipe all the while their f'n brats are screaming "I want, I need, gimme gimme gimme." I would probably be more considerate of others if I thought that they had any respect for me. License breeding then legislate mufflers. I think there was some sort of exhaust pipe suggestion in there. ;D
Anger is an energy. May the road rise with you.
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Offline GroovieGhoulie

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Re: Exhaust Options?
« Reply #24 on: July 07, 2006, 03:26:35 PM »
Are there any four-into-fours on the market that replicate the look of the matee-black Megaphones on the '60s Honda GP bikes, but have SOME packing or baffles so they are not straight megaphones?  I know some places sell the meggas, but those wouldn't work too well on the street.

I want this look (and performance) on my cafe build, but don't want to wake everyone up in a 2-mile radius, nor do I want to run afoul of the law.

Offline HondaMan

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Re: Exhaust Options?
« Reply #25 on: July 07, 2006, 08:54:38 PM »
I'm going to be using this bike for commuting into the city and cruising with a passenger on the weekends. Given that, it sounds like maybe I can get away with sticking to the four into four and taking a swipe at tuning it. As I'll have this in Manhattan, I definitely subscribe to the loud pipes being good theory. It always amazes me that pedestrians will walk right in front of my car, but scatter when they hear a motorcycle coming.

On the K1, are there any baffles to be dealt with on the stock exhaust? Also, any thoughts on replacing the stock mufflers with something else? A friend of mine recommend four straight pipes, but I'm not too sure that's a realistic option. He drag races muscle cars, so I'm thinking that his advice might be ill conceived for motorcycles.

In the realm of the CB750K series, the K0/K1 pipes were the best. They had fiberglass baffles that restricted very little, but effectively reduced noise until you ripped-it open. These engines, intake valves, and jetting were all set up for the fiberglass-packed baffles from the start, and later pipes caused loss of power and response because of it.

If you still have the stock K1 jetting, it will be 115 or 120 main jets. If you're doing mostly in-town, stop-n-go and short hiway hops, it will probably be happier with 110 jets and modified emulsifier tubes (see the post about this in "FAQ, thoughts of Hondaman" that someone set up). If you have the stock gearing, it will be 17T countersprocket, 48T rear, ideal for commuting. If someone installed the later 18T countersprocket, try a 17T and I think you'll appreciate the difference. These bikes actually get BETTER mileage on the 17T than on the 18T because it's closer to the engine's power curve, and you'll find yourself in higher gears more often. And, you can still reach over 125+ MPH that way...
See SOHC4shop.com for info about the gadgets I make for these bikes.

The demons are repulsed when a man does good. Use that.
Blood is thicker than water, but motor oil is thicker yet...so, don't mess with my SOHC4, or I might have to hurt you.
Hondaman's creed: "Bikers are family. Treat them accordingly."

Link to Hondaman Ignition: http://forums.sohc4.net/index.php?topic=67543.0

Link to My CB750 Book: https://www.lulu.com/search?adult_audience_rating=00&page=1&pageSize=10&q=my+cb750+book
Link to My CB500/CB550 Book: https://www.lulu.com/search?sortBy=RELEVANCE&page=1&q=my+cb550+book&pageSize=10&adult_audience_rating=00
Link to website: https://sohc4shop.com/  (Note: no longer at www.SOHC4shop.com, moved off WWW. in 2024).

Offline techy5025

  • Expert
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  • Posts: 886
  • 1969 Diecast and Sandcast 750's
Re: Exhaust Options?
« Reply #26 on: July 07, 2006, 09:12:08 PM »
I still like the look of the original 4-4 exhausts and it has nothing to do with
getting the most power out of the bike.  I just think they look good and are
distinctive to the bike. I used the 341's on the sandcast even though they
are not correct for the year, because having gone through two sets of 300's
and two sets of 341's, I believe the 341's  last longer and are quieter which
I prefer.

I had rather draw attention with the way the bike looks and not how much
noise it makes. ;)

Jim
........
1969 750 K0 (Reborn)
1969 Sandcast 750 K0 (Reborn)
2003 CBR600F4I
........