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Author Topic: 400/4 F1 Cafe Racer Project - New Exhaust System  (Read 1939 times)

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Offline robnobrakes

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400/4 F1 Cafe Racer Project - New Exhaust System
« on: September 13, 2014, 05:39:52 PM »
Mizuno Motor (copycat Yoshi) Short Exhaust System now fitted to my '77 CB400/4, replacing a 1970s Yoshimura 'Long' system.






Removed Yoshi Long system

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Rob

'77 CB400F1 Cafe Project, '94 Ducati 900SS, '94 Speed Triple T309, '95 Daytona Super III, '98 Triumph Tiger 900,

Offline calj737

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Re: 400/4 F1 Cafe Racer Project - New Exhaust System
« Reply #1 on: September 13, 2014, 06:19:41 PM »
I'm with you, that new pipe looks much better on that bike. Some info on the front rotor?
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'74 550 Build http://forums.sohc4.net/index.php?topic=126401.0
'73 500 Build http://forums.sohc4.net/index.php?topic=132935.0

"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline Blackfin5

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Re: 400/4 F1 Cafe Racer Project - New Exhaust System
« Reply #2 on: September 13, 2014, 07:19:50 PM »
Very nice.  I love the 400/4 F and what you've done with it.  Reminds me of the old Lotus racing colors - except not as mustardy a yellow.

One day I want to cafe a Triton in Lotus racing colors.
« Last Edit: September 13, 2014, 07:49:51 PM by Blackfin5 »
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Offline SOHC4 Cafe Racer Fan

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Re: 400/4 F1 Cafe Racer Project - New Exhaust System
« Reply #3 on: September 13, 2014, 09:51:01 PM »
I like the smooth bend Yosh replica 4-1 you just installed.  Not so sure about the saw blade brake rotor.
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1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline robnobrakes

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Re: 400/4 F1 Cafe Racer Project - New Exhaust System
« Reply #4 on: September 13, 2014, 10:30:42 PM »
Quote from: Blackfin5 on September 13, 2014, 07:19:50 PM
Very nice.  I love the 400/4 F and what you've done with it.  Reminds me of the old Lotus racing colors - except not as mustardy a yellow.

One day I want to cafe a Triton in Lotus racing colors.

Actually, the bike is painted in authentic Team Lotus Formula 1 racing colours from 1966/67, as raced by the great Jim Clark.  I obtained the correct paint codes.
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Rob

'77 CB400F1 Cafe Project, '94 Ducati 900SS, '94 Speed Triple T309, '95 Daytona Super III, '98 Triumph Tiger 900,

Offline robnobrakes

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Re: 400/4 F1 Cafe Racer Project - New Exhaust System
« Reply #5 on: September 13, 2014, 10:33:57 PM »
Quote from: calj737 on September 13, 2014, 06:19:41 PM
I'm with you, that new pipe looks much better on that bike. Some info on the front rotor?

Home modified.  I can't say it improves brake performance by much, but is certainly a talking point.  A have a stock disc to replace it should I feel the need.
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Rob

'77 CB400F1 Cafe Project, '94 Ducati 900SS, '94 Speed Triple T309, '95 Daytona Super III, '98 Triumph Tiger 900,

Offline calj737

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Re: 400/4 F1 Cafe Racer Project - New Exhaust System
« Reply #6 on: September 14, 2014, 04:18:34 AM »
Quote from: robnobrakes on September 13, 2014, 10:33:57 PM
Home modified.  I can't say it improves brake performance by much, but is certainly a talking point.
Adventurous! I would almost think it would degrade braking since less surface area is in constant contact with the pads. I was going to ask, do you find it chirping or shuddering under heavy pressure?

Either way, kudos for a clever "talking point"  ;)
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'74 550 Build http://forums.sohc4.net/index.php?topic=126401.0
'73 500 Build http://forums.sohc4.net/index.php?topic=132935.0

"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline Blackfin5

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Re: 400/4 F1 Cafe Racer Project - New Exhaust System
« Reply #7 on: September 14, 2014, 07:27:04 AM »
Correct codes from the 60s for Lotus??  Very cooool!
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Offline SOHC4 Cafe Racer Fan

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Re: 400/4 F1 Cafe Racer Project - New Exhaust System
« Reply #8 on: September 14, 2014, 08:28:58 AM »
Quote from: calj737 on September 14, 2014, 04:18:34 AM
Quote from: robnobrakes on September 13, 2014, 10:33:57 PM
Home modified.  I can't say it improves brake performance by much, but is certainly a talking point.
Adventurous! I would almost think it would degrade braking since less surface area is in constant contact with the pads. I was going to ask, do you find it chirping or shuddering under heavy pressure?

Either way, kudos for a clever "talking point"  ;)

I would think the rotor might go through pads faster than slotted discs (cheese grater effect).  That is a bit more extreme than petal/wave rotors.  Cal brings up a good question/concern about chatter/shuddering.  Of course, it may work just fine.  Let us know.
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1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline robnobrakes

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Re: 400/4 F1 Cafe Racer Project - New Exhaust System
« Reply #9 on: September 14, 2014, 11:04:48 AM »
Quote from: CB750 Cafe Racer Fan on September 14, 2014, 08:28:58 AM
Quote from: calj737 on September 14, 2014, 04:18:34 AM
Quote from: robnobrakes on September 13, 2014, 10:33:57 PM
Home modified.  I can't say it improves brake performance by much, but is certainly a talking point.
Adventurous! I would almost think it would degrade braking since less surface area is in constant contact with the pads. I was going to ask, do you find it chirping or shuddering under heavy pressure?

Either way, kudos for a clever "talking point"  ;)

I would think the rotor might go through pads faster than slotted discs (cheese grater effect).  That is a bit more extreme than petal/wave rotors.  Cal brings up a good question/concern about chatter/shuddering.  Of course, it may work just fine.  Let us know.

No chirping or juddering. The brake feels normal.   Pad wear may be reduced, only time will tell.
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Rob

'77 CB400F1 Cafe Project, '94 Ducati 900SS, '94 Speed Triple T309, '95 Daytona Super III, '98 Triumph Tiger 900,
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