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Author Topic: 400/4 F1 Cafe Racer Project - New Exhaust System  (Read 1981 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 Blackfin5

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Re: 400/4 F1 Cafe Racer Project - New Exhaust System
« Reply #1 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 #2 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 #3 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 #4 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 Blackfin5

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Re: 400/4 F1 Cafe Racer Project - New Exhaust System
« Reply #5 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 #6 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 #7 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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