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Author Topic: Turbo CB400F  (Read 909 times)

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Offline Rick4004

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Turbo CB400F
« on: October 01, 2022, 11:55:36 am »
This is more of a "completed" thread than a build thread. The project took about 10 years from start of design to build completion, so a build thread would have been a long drawn out affair. Bike Specs:

Engine
 
Honda CB400F 4 cylinder, air cooled
Capacity - 400cc - 51mm bore x 50mm stroke
Compression ratio 9.4:1
Redline 10,000 rpm
Stock power - 37HP @ 8,500 rpm, 24 lb-ft @ 7,500 rpm @ crankshaft
Calculated power @ 10 PSI boost - 65HP, 44 lb-ft torque @ crankshaft
Measured HP at wheel via G-Tech instrument - 54HP @ wheel
Intake - Turbo>Intercooler>Upper Plenum>2 x 38mm CBR600RR throttle bodies>Log Style Lower Plenum>Injector Bodies
Intercooler - Bell core with custom end tanks
Turbo - Chinese VZ-21 (IHI RHB31 clone)
Stainless exhaust collector - hand built. Akrapovic titanium muffler
ECU - Microsquirt v3
Custom 12-1 trigger wheel, CBR600RR VR sensor
CBR600RR lower injectors (4) in custom injector bodies
CBR600RR Throttle Position Sensor
CBR600RR Fuel Pump
GM Air Temp Sensor
GM Coolant Temp Sensor
GM 2 bar sensor for MAP
GM 1 bar sensor for atmospheric Baro
Bosch 4 tower Logic Coil - Wasted spark
14Point7 Spartan 2 Wideband O2 controller/Bosch LSU 4.9

Other Engine upgrades

APE upgraded cylinder studs
Heavy duty cam chain
Barnett clutch plates
CBR600RR charging system
Hand built oil pan to accommodate turbo oil draining
CNC oil filter plate to fit oil cooler/turbo feed lines and fit a spin-on filter
Earl's curved oil cooler
Dished sprocket and bearing support to fit wider rear wheel

Chassis

Wheels - Spun Aluminum Rims, CNC machined hubs and spokes. 120 x 17 front, 160 x 17 rear
Front Forks, front disk, front caliper, front axle - CBR954RR
Triple clamps and clip on bars - CNC
Frame - Hand built 1028 ERW mild steel, 6061-T6 plate
Subrame - CNC 6061-T6
Swingarm/shock - Aprillia Mille swingarm (narrowed), CBR600RR shock. Steel rocker Link (mimics CBR600RR ratio)
Rear disk - CBR600F1. Rear Caliper - Brembo. Rear Master cylinder - Honda CR250

Body

Fairing mount, headlights - Buell Firebolt - magnesium
Fairing - Carbon Fiber
Front Fender - Carbon Fiber from unknown Yamaha - Hand formed and CNC aluminum mounts
Gauges - Koso RX-2, Accell boost gauge
Shorai Lithium battery
Custom Wiring harness
Tank - Hand formed 3003 aluminum
Seats - Hand built
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Offline PeWe

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Re: Turbo CB400F
« Reply #1 on: October 01, 2022, 12:18:52 pm »
That is a really tough looking bike and a fantastic build.
Who can guess what bike the build is based on?

Must be a Bike Of The Month contender!
« Last Edit: October 03, 2022, 08:36:58 pm by PeWe »
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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 Shtonecb500

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Re: Turbo CB400F
« Reply #2 on: October 01, 2022, 01:30:10 pm »
holy crap.
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73/74'' CB500/550 resto-mod - sold
75' 750f 91' cbr f2 swap cafe - mock up
74' 750 chopper hardtail - complete - sold
74' CB750/836kit - Black mix & match - daily rider - always tweaking
71' cb500 K0 survivor - complete
71' K1 - CANDY GOLD/BROWN Winton kit - in process

Offline Tim2005

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Re: Turbo CB400F
« Reply #3 on: October 01, 2022, 02:23:12 pm »
Wow Rick, that's amazing, I cant imagine how many hours have gone into the build. How does it ride?
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Offline Rick4004

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Re: Turbo CB400F
« Reply #4 on: October 01, 2022, 02:47:11 pm »
PeWe - I'm interested to hear what you think was the inspiration, because I can't pinpoint anything. Remember, I started designing the overall layout in about 2009.

Tim2005 - If you didn't know it what it was, you'd never guess from riding it. The geometry/suspension/brakes/weight distribution mimics current designs, so it handles like a modern bike. The turbo starts building boost at 5k, is at full boost by 6k, and then pulls till 10k. Slow by modern fast bike standards, but probably as quick as a Ninja 400. It weighs just over 400lbs, there's no getting away from the mass of a 4 cylinder engine, the turbo, and all the associated intake plenums.
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Offline Tim2005

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Re: Turbo CB400F
« Reply #5 on: October 02, 2022, 01:07:32 pm »
Sounds a lot of fun. Does the clutch cope ok? When I've tuned these motors I've always found that is quite a problem
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Offline grcamna2

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Re: Turbo CB400F
« Reply #6 on: October 02, 2022, 02:17:00 pm »
That must ride awesome !  ;)
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75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline Rick4004

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Re: Turbo CB400F
« Reply #7 on: October 02, 2022, 03:02:38 pm »
The clutch will slip under boost until the oil temp is at least 125F. Once it is fully warmed there is no problem. The Barnett plates are a major p.i.t.a. when cold. They stick together like glue. Even on a nice summer day I usually start the bike in the garage, let the oil warm up a bit, back it out on the the sloped approach, and when I leave I let it coast down the slope before I put it in gear.  The plates will still stick for the first 50 feet or so with the lever pulled in.
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Offline SOHC4 Cafe Racer Fan

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Re: Turbo CB400F
« Reply #8 on: October 03, 2022, 10:15:17 am »
Wow, that is a lot of work!  At first glance, I was thinking you posted your Buell photos by mistake!  You really need to have your own shop manual for this one - just for maintenance and spare parts!
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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 Rick4004

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Re: Turbo CB400F
« Reply #9 on: October 03, 2022, 05:42:35 pm »
Yes, a 2" thick file folder, a 1" thick note book, gigabites of CAD files, and a wiring diagram that covers 2 sheets of 11"x17" paper.

Quote
You really need to have your own shop manual for this one - just for maintenance and spare parts!
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Offline SOHC4 Cafe Racer Fan

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Re: Turbo CB400F
« Reply #10 on: October 03, 2022, 07:50:19 pm »
Rick,

FYI - your bike has been nominated for Bike of the Month.  To be eligible for voting, you must post that you "accept" the nomination in the following thread:   http://forums.sohc4.net/index.php/topic,180400.0.html

Congratulations!!
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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 WideAWAKE

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Re: Turbo CB400F
« Reply #11 on: October 04, 2022, 01:56:53 pm »
That’s pretty wild!!!

It’s nothing I would ever dream up but I dig it!
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Offline Kevin

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Re: Turbo CB400F
« Reply #12 on: October 10, 2022, 08:52:21 am »
Very Cool Rick!
It's about time we got to see it all put together!
I wish I had 1/10th of your talent.



Sent from my SM-S908U1 using Tapatalk

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A couple of 400F's and a
'98 Suzuki Intruder VS1400 ~ for long rides
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