« previous next »
Pages: 1 [2]  All   Go Down

Author Topic: 4-1 pipe , who made the best  (Read 5675 times)

0 Members and 3 Guests are viewing this topic.

Offline PeWe

  • Really Old Timer ...
  • *******
  • Posts: 15,452
  • Bike almost back to the 70's 2015
Re: 4-1 pipe , who made the best
« Reply #25 on: March 13, 2013, 07:16:09 am »
Quote from: Bill/BentON Racing on March 12, 2013, 06:52:53 pm
Yosh replica from Carpy works well, looks and sounds awesome! Very light.Bill
The weight is an important aspect too. Stainless does not need to be repainted as a painted exhaust. I had one black 4-1 that needed paint touch up very often. I'm sure that Carpy's 4-1 can be polished and chromed, but it will cost.
Logged
CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline gschuld

  • Master
  • *****
  • Posts: 2,346
Re: 4-1 pipe , who made the best
« Reply #26 on: March 19, 2013, 07:19:38 am »
Perhaps not THE best, but a worthy historical footnote regardless...

George

P.S.  That is Russ Collins, BTW, from a January 1972 edition of Cycle Guide.  His first product...those 4 into 1 exhausts, chrome or black.  He sold LOTS of them!
« Last Edit: March 19, 2013, 07:25:58 am by gschuld »
Logged

Offline BLUE71TURBO

  • Master
  • *****
  • Posts: 1,849
Re: 4-1 pipe , who made the best
« Reply #27 on: March 19, 2013, 01:38:41 pm »
The best 4 into 1 pipe made ?  Hell that's easy........ the one on my turbo bike.   ;D ;D   ::)


     


     
Logged
Remember; Before you can be old and wise, you must first be young and stupid !

Offline spiritof67

  • Hot Shot
  • ***
  • Posts: 338
Re: 4-1 pipe , who made the best
« Reply #28 on: March 21, 2013, 12:37:38 pm »
Reply to Bill BentON: I used to have an early dyno chart for two CB750's that were swapped to Bassani's, but the dusts of time have taken them. Either that or they're lost in my attic. As I recall, there was a power pickup even with stock jetting, but with (was it 120's?125's?) a noticeable amount extra from 3000+ adding up to about 5 hp at 8000, which was as far as the dyno guy wanted to go. 5 hp might not sound like much today, but considering that the 750 was rated at 67 hp but probably averaged in the high 40's-mid 50's in the real world, it was a considerable jump. We never did try the "race only" cone, though!
Logged

Offline Bill/BentON Racing

  • Really Old Timer ...
  • *******
  • Posts: 6,724
  • Ex Honda Service Manager, Cert. Honda Tech - Racer
    • BentON Racing
Re: 4-1 pipe , who made the best
« Reply #29 on: March 21, 2013, 04:27:10 pm »
Yes, an honest 10%! Most pipe manufacturers claimed 10-15%.10% more like it.Ever find the dyno charts, post please. Thanks Bill
Logged
BentON Racing Website
OEM Parts | Service | Custom Builds
BentON Racing Facebook
Over 35 years of experience working on vintage motorcycles, with a speciality in Honda SOHC/4 with a focus on the CB750 and other models as well from 1966 - 1985.
______________________________________
1993 HRC RS125 | 1984 NS400R | 1974 Honda CB750/836cc (Calendar Girl) | 1972 CB 500/550 Yoshi Kitted 590cc | 1965 Honda CB450 Black Bomber | 1972 Suzuki T350 | 1973 88cc | Z50/Falcons Pit Bike | 1967 CA100| 1974 CB350 (400F motor)...and more.
______________________________________
See our latest build 'Captain Marvel' CLICK HERE

Offline PeWe

  • Really Old Timer ...
  • *******
  • Posts: 15,452
  • Bike almost back to the 70's 2015
Re: 4-1 pipe , who made the best
« Reply #30 on: March 22, 2013, 12:59:16 pm »
Quote from: gschuld on March 19, 2013, 07:19:38 am
Perhaps not THE best, but a worthy historical footnote regardless...

George

P.S.  That is Russ Collins, BTW, from a January 1972 edition of Cycle Guide.  His first product...those 4 into 1 exhausts, chrome or black.  He sold LOTS of them!
This RC was bought 8 years later..1980.. I think I got the version for K7 when i ordered 1977 when my bikes registry paper is 1977 (but built 1976). That explain the upwards angle of the baffle. I had to use brackets for passenger fot pegs.  (The 4-1 on my avatar bike is an Alfa 4-1, good bang for the buck 1983.  Maybe I'll put it on again)
« Last Edit: March 22, 2013, 01:05:28 pm by PeWe »
Logged
CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Online MRieck

  • Really Old Timer ...
  • *******
  • Posts: 10,541
  • Big ideas....
Re: 4-1 pipe , who made the best
« Reply #31 on: March 22, 2013, 02:19:23 pm »
Quote from: PeWe on March 22, 2013, 12:59:16 pm
Quote from: gschuld on March 19, 2013, 07:19:38 am
Perhaps not THE best, but a worthy historical footnote regardless...

George

P.S.  That is Russ Collins, BTW, from a January 1972 edition of Cycle Guide.  His first product...those 4 into 1 exhausts, chrome or black.  He sold LOTS of them!
This RC was bought 8 years later..1980.. I think I got the version for K7 when i ordered 1977 when my bikes registry paper is 1977 (but built 1976). That explain the upwards angle of the baffle. I had to use brackets for passenger fot pegs.  (The 4-1 on my avatar bike is an Alfa 4-1, good bang for the buck 1983.  Maybe I'll put it on again)
That is a real funky ride PeWe. ;) ;D
Logged
Owner of the "Million Dollar CB"

Offline H2Eric

  • Hot Shot
  • ***
  • Posts: 349
Re: 4-1 pipe , who made the best
« Reply #32 on: March 22, 2013, 03:58:05 pm »
Quote from: Bill/BentON Racing on March 12, 2013, 06:52:53 pm
Yosh replica from Carpy works well, looks and sounds awesome! Very light.Bill

Got one of those on K9


Eric
Logged
Honda CR750
Honda CB750K3
Kawasaki 750H2B
Suzuki GS750
Honda CB175
Honda CB350F
Yamaha R1

http://forums.sohc4.net/index.php/topic,94588.0.html

Growing old is mandatory, growing up is optional.

Offline Retro Rocket

  • Eggs are hard due too a
  • Really Old Timer ...
  • *******
  • Posts: 19,279
  • ROCK & ROLL
Re: 4-1 pipe , who made the best
« Reply #33 on: March 22, 2013, 04:11:12 pm »
Gady Eric, hows that billet block engine going mate...?
Logged
750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
If You can't fix it with a hammer, You've got an electrical problem.

Offline PeWe

  • Really Old Timer ...
  • *******
  • Posts: 15,452
  • Bike almost back to the 70's 2015
Re: 4-1 pipe , who made the best
« Reply #34 on: March 23, 2013, 10:37:33 am »
Quote from: MRieck on March 22, 2013, 02:19:23 pm
Quote from: PeWe on March 22, 2013, 12:59:16 pm
Quote from: gschuld on March 19, 2013, 07:19:38 am
Perhaps not THE best, but a worthy historical footnote regardless...

George

P.S.  That is Russ Collins, BTW, from a January 1972 edition of Cycle Guide.  His first product...those 4 into 1 exhausts, chrome or black.  He sold LOTS of them!
This RC was bought 8 years later..1980.. I think I got the version for K7 when i ordered 1977 when my bikes registry paper is 1977 (but built 1976). That explain the upwards angle of the baffle. I had to use brackets for passenger fot pegs.  (The 4-1 on my avatar bike is an Alfa 4-1, good bang for the buck 1983.  Maybe I'll put it on again)
That is a real funky ride PeWe. ;) ;D

Yes, we thought so too here end of 70's, earliy 80's ! :-)
Not hat stable with 6"inch longer fork and that handle bar. 16"  and wider rear wheel was hot too then.... Open helmet was a must as well. Kawasaki Z1 900 mirrors as an improvement. I have bought new copies.
I still remember 5-15 bikes (Mostly CB750, Kawa Z1900/1000's) riding around like that, all with wonderful singing 4-1!! One guy twisted the throttle, all other followed.. Really nice sound!!!

My bike changed to this april 1984 with a new Alfa 4-1. (My RC was badly scratched and later sold) After that black seat and drag handle bar.

« Last Edit: March 23, 2013, 10:45:24 am by PeWe »
Logged
CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline PeWe

  • Really Old Timer ...
  • *******
  • Posts: 15,452
  • Bike almost back to the 70's 2015
Re: 4-1 pipe , who made the best
« Reply #35 on: March 24, 2013, 12:10:16 am »
Quote from: H2Eric on March 22, 2013, 03:58:05 pm
Quote from: Bill/BentON Racing on March 12, 2013, 06:52:53 pm
Yosh replica from Carpy works well, looks and sounds awesome! Very light.Bill

Got one of those on K9


Eric
That look really nice. I can imagine it sounds awesome!
Water will enter the system when parked in rain so a small hole at lowest point needed to drain eventual water?
« Last Edit: March 24, 2013, 12:20:02 am by PeWe »
Logged
CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline Tim2005

  • Expert
  • ****
  • Posts: 1,377
Re: 4-1 pipe , who made the best
« Reply #36 on: March 27, 2013, 12:14:31 pm »
If looking for the best performance sohc pipe, how's about the Baldes 4:2:1 systems too?  And is there any consensus whether 4:2:1 is preferable to 4:1?
Logged

Offline 754

  • Really Old Timer ...
  • *******
  • Posts: 29,058
Re: 4-1 pipe , who made the best
« Reply #37 on: March 27, 2013, 03:42:35 pm »
Where are you from?.. Never heard of that pipe before..
Logged
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline Tim2005

  • Expert
  • ****
  • Posts: 1,377
Re: 4-1 pipe , who made the best
« Reply #38 on: March 27, 2013, 04:08:39 pm »
I'm UK, but Baldes are German - http://www.baldes-auspuff.de/    unfortunately the site is in German too

Talking of rare sohc pipes, anyone for a bit of Titanium...?
Logged
Pages: 1 [2]  All   Go Up
« previous next »