Supercharged Honda CB750 by Justin Blue

Supercharged Honda CB750

Best in Show:  Supercharged, Big Bore Honda CB750 from Alabama…

It’s a truth universally acknowledged:  When you put together a Honda engineer, a ’74 CB750, and an AMR500 supercharger, good things happen.

Supercharged Honda CB750

Earlier this month, Justin Blue — a Honda engineer living in Pell City, Alabama — brought this gorgeous orange Honda “CB836” to the Barber Vintage Motorcycle Festival. The bike would take home two awards:  “Best-Sounding Japanese Four Cylinder” and “All Class Champion” at the 2018 Ace Corner Championship, hosted by Ace Cafe Orlando and our friend Kevin Dunworth of Dunworth Machines.

Below, we get the full story on this boosted, 836cc CB.

Supercharged Honda “CB836”: Builder Interview

About me:

My name is Justin Blue, I’m currently living in Pell City, AL. I have been into bikes my whole life, grew up riding and racing motocross. Have been titled a fabricator/welder for the last 8 years or so. I started building bikes back in college after I gave up motocross racing. After graduating with my bachelors in Mechanical Engineering, I got a job working for Honda. I have multiple bikes but a Honda fan at heart. I currently build bikes in my spare time for myself at a friend of mine’s shop.

Supercharged Honda CB750

The build:

The bike is a 1974 Honda CB750.

Bike build:

The bike was build for my pure pleasure and to test my skills.

Supercharged Honda CB750

Design of the bike:

The design of the build was to have a true custom-built bike of something I’ve never seen. I’ve always been a fan of the CB’s being my first cafe project was a CB550. I always wanted a CB750 but I wanted it to be highly modified, and something I could see myself riding.

Supercharged Honda CB750

Custom work:

The bike is far from stock. First the bike came in boxes and a frame for $300. I managed to round up parts to make a complete bike. I chopped the frame and hooped the tail section with a handmade seat section. I rebuilt the engine with an 836 kit, forged aluminum rods, cx-3 cam, lowered compression, added a AMR500 supercharger and created a custom one off Jackshaft setup driven of the crank. The blower is set up for 1.3:1 pushing 5-10 lbs depending on the blow of valve. Fitted with a custom hand made intake breathing through a single HSR42 flatside carb. Completely new wiring harness, electronic ignition. Everything on the bike was hand made other then the tank and windshield.

Supercharged Honda CB750

Classification:

A real cafe RACER.

Proud moments:

Adapting a supercharger and actually making it run like I planned on. Also creating something I’ve never seen before with this particular setup.

Thanks to:

Danny Parks sharing his shop with me and helping me when he could. Dixieland Powder Coating for all the coating and sandblasting. Also Street Style Garage for painting my parts last minute.

 

Follow the Builder

Instagram: @jdblue189
Facebook: Justin Blue

2 Comments

  1. like everything about the bike,
    -paint combo (nice tone on orange)
    -the blower
    -nice sound. how does it drag race?

  2. Michael Ryder

    Great work and vision. I had a Druin on one a long time ago, pissed fuel while stopped at lights and would eat chain for breakfast.
    Rickman orange was a good choice.

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