Author Topic: 4-1 pipe , who made the best (Read 5673 times)

Red Good · « **on:** February 21, 2013, 06:20:40 pm »

1 and are there any used ones for sale ? For a cb750 motor . Tia , Red

Sam Green Racing · « **Reply #1 on:** February 21, 2013, 06:27:52 pm »

Red, ask here. http://forums.sohc4.net/index.php?topic=82842.0

Sam.

BLUE71TURBO · « **Reply #2 on:** February 21, 2013, 09:29:53 pm »

Or ask here in the wanted ads ........... http://forums.sohc4.net/index.php?board=45.0

POPS 911 · « **Reply #3 on:** February 24, 2013, 09:53:14 am »

CB750 SIDEWINDER : At the Dealers show in INDY last weekend at the TSUKIGI booth I had a talk with Brad and the owner about pipes, will send a 1976 CB750A 4-1 OEM to them to have them make a Sidewinder with a removable baffle for Drag racing = best pipe made and MSP proved that on the Dyno and the TRACK with many fast BUSA, ask BROCK.

POPS BK911

Retro Rocket · « **Reply #4 on:** February 24, 2013, 01:44:41 pm »

Red, what do you want the pipe for mate, racing, drag racing, or the street.? Sidewinders are useless on the street, no ground clearance on the right side and i have never seen one with equal length header pipes so i doubt they would be even close to the best performance pipe out there.. Kerker made some good ones, Yoshi made great pipes and at the moment Motogpwerks are making yoshi replica's and race specific pipes as are CycleX. A bit more information would be helpful....

POPS 911 · « **Reply #5 on:** February 25, 2013, 05:07:49 am »

SIR: The 1976 CB750A pipe 4-1 is on the left side like the F , no problems with any shift brackets,arm or anything I got two DYNO TO USE IF YOU WANT A PIPE TO PIPE TEST ? We had many BUSA riders ride many street miles with no problems, easy pipes to mount, [ had to cut the lower fairing on the right side a little ] why do you think SCHNITZ sells them all over the world = call him and ask DAVE if this pipe makes power as his son runs a dyno just fine at their shop.

Retro Rocket · « **Reply #6 on:** February 25, 2013, 02:33:44 pm »

Quote from: POPS 911 on February 25, 2013, 05:07:49 am

SIR: The 1976 CB750A pipe 4-1 is on the left side like the F , no problems with any shift brackets,arm or anything I got two DYNO TO USE IF YOU WANT A PIPE TO PIPE TEST ? We had many BUSA riders ride many street miles with no problems, easy pipes to mount, [ had to cut the lower fairing on the right side a little ] why do you think SCHNITZ sells them all over the world = call him and ask DAVE if this pipe makes power as his son runs a dyno just fine at their shop.

Pops, we are talking road bikes mate, i have a friggin left hand side winder in my shop, {actually sold that tail pipe to Dave 500} TOTALLY USELESS FOR THE STREET, I never said it fouled the linkage, IT HITS THE ROAD VERY EASILY AND FOR THAT REASON ALONE IT IS DANGEROUS, and if you know as much as you claim to know then you should be well aware that TUNED LENGTH PIPES are far better at getting exhaust gases out properly with the correct pulses than an uneven length pipe, thats why they are tuned length, funny like that....

We are also talking SOHC Honda's mate, BUSA'a have lots more ground clearance {which was my original point}... Maybe if you recognized that there are also OTHER classes of racing motorcycles {some actually go round corners} you wouldn't be so one eyed about drag racing. You will not see unequal length pipes on any road race bike period. While you are dyno tuning, try a tuned length pipe on the bikes you mentioned here and you may just get a big surprise...

Equal Length Exhaust

Quote

If the pipes are not equal length, both inertial scavenging and wave scavenging will vary among engine cylinders, often dramatically. This, in turn, causes different tuning requirements for different cylinders. These variations affect air/fuel mixtures and timing requirements, and can make it very difficult to achieve optimal tuning. Equal length pipes eliminate these exhaust-induced difficulties. "Tuning", in the context used here, does not mean installing new sparkplugs and an air filter. It means configuring a combination of mechanical components to maximum efficiency for a specific purpose and it can not be overemphasized that such tuning is the path to superior performance with a combination of parts that must work together in a complimentary manner.

In an exhaust system that is properly designed for its application, equal length pipes are generally more efficient. The lengths of both the primary and main section of pipes strongly influence the location of the torque peak(s) within the powerband. In street and track performance engines with longer pipes typically produce more low-to-mid range torque than shorter pipes and it is torque that moves a motorcycle.

turboguzzi · « **Reply #7 on:** February 25, 2013, 02:39:23 pm »

Gee... the red guy cant even say best for what and you all are already full into it?

give yourself a break ya'all

spiritof67 · « **Reply #8 on:** February 25, 2013, 06:49:02 pm »

Yeah, I think I'll skip all the friction, drama, etc. that this very simple question seems to have "empowered".

The ANSWER is "Bassani". Darryl made a 4 into one that (1) gave excellent ground clearance (2) didn't get in the way of the oil filter housing or the oil drain plug (3) came with a "racing only" (ha, ha...) alternate tip (4) made better power than stock was lighter and was hardly any louder. Oh, and (5) it didn't require that you remove your centerstand.

It also wasn't as aggressively marketed as Kerker, RC et al. It was still the best, though - even unto this day. And yes, though this will seem like heresy, it was better than - gasp! - the Yoshimura pipe, which required all sorts of compromises since it was a mildly reworked race exhaust. Darryl's was designed as a street pipe. Just sayin'. My opinion only here. Not a diktat or a polemic. Please don't be offended. Wait - be offended if you have that much free time!

Bill/BentON Racing · « **Reply #9 on:** February 25, 2013, 08:07:22 pm »

All good points.But mostly concerning weight, fit, etc. Any evidence to back up best as in power gained with proper jetting? Bassanis is where we ended up with on CB1100F.What a sound, WFO 11, 000 RPM!!!

, yes made good power, no dyno results tho.Thanks Bill

Retro Rocket · « **Reply #10 on:** February 25, 2013, 08:27:37 pm »

Quote from: turboguzzi on February 25, 2013, 02:39:23 pm

Gee... the red guy cant even say best for what and you all are already full into it?

give yourself a break ya'all

90+% of guys on this forum ride road bikes and seeings though its in the performance section i would guess the OP wants a performance 4 into 1...I already asked for more info.... Pops needs to learn to read and post legible answers, i made my points clearly, clearly he didn't get that.

junkyardjon · « **Reply #11 on:** February 25, 2013, 09:21:58 pm »

yeah Red the bassani pipe does sound pretty good and has a little more pick up, after rejetting from the drags of course.. i liked it better than the kerker and the drags. if you want some pic's, shoot me a email. it's on my red bike now. i'm having a murray style pipe built local for the lay down frame, not sure how well it's gonna do for power but i'm gonna find out lol.

take care bud

peter400four · « **Reply #12 on:** February 27, 2013, 06:32:44 pm »

WOW!! What action.
I can only talk about the pipe b-spoke design made for my nearly bog standard (standard cam and compression, but bored to about 435cc) CB400F prior to the 2011 Australian Historic Road Race Championships down in Tassie. (That's the real home of the Tassie Devil, NOT a Holywood studio). Anyhow, the b-spoke boys did a little cleaning up of the ports and cut some (quite a bit) of weight from my 1976 400 and it finished fourth in the championship, no doubt helped by the fact that it poured with rain most of the time and the two strokes couldn't get their peaky power down in the corners. My bike is also only fractionally slower than a pretty standard GSX750 Suzuki that races in out club championships (Tasmanian Motor Cycle Club).
peter400four

POPS 911 · « **Reply #13 on:** March 01, 2013, 04:24:41 pm »

SIR: So you are saying TSUKIGI pipes are not equal lengths ? They make many pipes for street bikes for 4 into 1 set ups on stock and built motors not just for drag racing but for folks who want less weigh and a better sound. Have you ever seen a TSUKIGI pipe and ran it against another pipe on a dyno ? Brock had many pipes at the dealers show at INDY and are fine pipes [ HINDELS ] his spec..... We had 10 sets hand made on a jig by a fab shop and they all dyno up and down.

junkyardjon · « **Reply #14 on:** March 01, 2013, 06:26:12 pm »

yo Red, i ran across another bassani pipe so if you ever wanna try one out, hit me up. i'm going to pick it up tomorrow.

later tater

Red Good · « **Reply #15 on:** March 02, 2013, 10:36:28 am »

JYJ if it's ok I will get Kate to send a call tag and you can work out the price and I will paypal you or mail a check . Red

MRieck · « **Reply #16 on:** March 02, 2013, 11:33:58 am »

To bad Akrapovic doesn't make a pipe for the CB. One of the best performing pipes for a wide variety of bikes. Fit, finish and performance second to none.

Red Good · « **Reply #17 on:** March 02, 2013, 08:16:52 pm »

Mike , I wish !

really didn't think this was going to cause such a stir .

MRieck · « **Reply #18 on:** March 03, 2013, 05:51:48 pm »

Quote from: Red Good on March 02, 2013, 08:16:52 pm

Mike , I wish !

really didn't think this was going to cause such a stir .

Me Too!

dragracer · « **Reply #19 on:** March 03, 2013, 06:35:36 pm »

One question, lots of answers, many laughs. OP confused as hell- not good.

754 · « **Reply #20 on:** March 03, 2013, 09:07:41 pm »

I think Bassani was almost as good as a Hooker Header

PeWe · « **Reply #21 on:** March 12, 2013, 12:58:53 pm »

These were good CB750 4-1 people liked here 30+ years ago... Yoshimura, Kerker, Bassani, RC. Devil a little bit too loud.
Marshall, Marving, Jardine, Motad did not get any good results in the tests I read in magazines end of 70's- early 80's.
I have looked for Yoshimura for many years, finally available from several makers. I hope to get som $$$ over and buy from Chris at motogpwerks. This is a beautiful design for CB750.

Bill/BentON Racing · « **Reply #22 on:** March 12, 2013, 06:52:53 pm »

Yosh replica from Carpy works well, looks and sounds awesome! Very light.Bill

MRieck · « **Reply #23 on:** March 12, 2013, 07:43:15 pm »

Come on guys...a $2,000.00 full Ti (including the baffle) Akra OR Ti Force is what we need. A 4/2/1 would probably be good for almost 10HP.

Bill/BentON Racing · « **Reply #24 on:** March 12, 2013, 08:04:46 pm »

OK,Kenny's for $399.00!!! 4-2-1

Bill

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Author Topic: 4-1 pipe , who made the best (Read 5673 times)