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Author Topic: Honda Cb 500 Four, Supercharged "BigBang" Chopper  (Read 10913 times)

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Offline Gurp

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Re: Honda Cb 500 Four, Supercharged "BigBang" Chopper
« Reply #50 on: September 07, 2019, 09:33:52 am »
great looking project. love the lines and the girder!
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slow Progress 74 cb550.

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Offline MauiK3

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Re: Honda Cb 500 Four, Supercharged "BigBang" Chopper
« Reply #51 on: September 07, 2019, 09:44:38 am »
Quite a work of art and engineering.
I wonder how much HP will be made?
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Offline SOHC4 Cafe Racer Fan

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Re: Honda Cb 500 Four, Supercharged "BigBang" Chopper
« Reply #52 on: September 07, 2019, 11:38:08 am »
Fingers crossed 🤞🏻 this bike will a real runner. I, too, would like to see how much power it makes and how that power makes it to the pavement.
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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
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"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)

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

Offline Keskine

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Re: Honda Cb 500 Four, Supercharged "BigBang" Chopper
« Reply #53 on: September 08, 2019, 08:30:33 am »
Quote from: MauiK3 on September 07, 2019, 09:44:38 am
Quite a work of art and engineering.
I wonder how much HP will be made?
Well in theory with the current gear-ratio that I have for the supercharger it should make about 0.9bar boost. Now if you calculate that 1bar of boost doubles the hp compared to naturally aspirated, I would be looking around 90hp from crank. But in reality I have no idea how much boost there is actually going to be and if the engine can even handle it.
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Offline Gurp

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Re: Honda Cb 500 Four, Supercharged "BigBang" Chopper
« Reply #54 on: September 11, 2019, 08:09:50 pm »
I would def spent some time on the high performance swction of the forum. the guys thag frequent that part cam amswer most questions you'll have.
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slow Progress 74 cb550.

Poor boy chop 73 CB500 chop

Future project 77 Cb750 Amen Savior

Offline Keskine

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Re: Honda Cb 500 Four, Supercharged "BigBang" Chopper
« Reply #55 on: September 18, 2019, 06:05:01 am »
Few updates again.

Rear light and licence plate mounting tack welded.



New lever for the petcock to replace the ugly plastic one. I also made a bracket that is going to mount the petcock to the frame.

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Offline MauiK3

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Re: Honda Cb 500 Four, Supercharged "BigBang" Chopper
« Reply #56 on: September 18, 2019, 09:36:22 am »
Beautiful work!
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1973 CB 750 K3
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Offline Terry in Australia

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Re: Honda Cb 500 Four, Supercharged "BigBang" Chopper
« Reply #57 on: September 19, 2019, 12:55:26 am »
Amazing attention to detail! Too good for this little black duck........... ;D
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Offline andy750

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Re: Honda Cb 500 Four, Supercharged "BigBang" Chopper
« Reply #58 on: September 19, 2019, 03:34:52 am »
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Current bikes
1. CB750K4: Long distance bike, 17 countries and counting...2001 - Trans-USA-Mexico, 2003 - European Tour, 2004 - SOHC Easy Rider Trip , 2008 - Adirondack Tour 2-up , 2013 - Tail of the Dragon Tour , 2017: 836 kit install and bottom end rebuild. And rebirth: http://forums.sohc4.net/index.php/topic,173213.msg2029836.html#msg2029836
2. CB750/810cc K2  - road racer with JMR worked head 71 hp
3. Yamaha Tenere T700 2022

Where did you go on your bike today? - http://forums.sohc4.net/index.php?topic=45183.2350

Offline Mantree

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Re: Honda Cb 500 Four, Supercharged "BigBang" Chopper
« Reply #59 on: January 11, 2020, 08:23:07 pm »
I'm digging that trigger wheel, where did you find it?  my carbs are about spent to I am getting ready to fuel inject it and probably run ignition off of it also.
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