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Author Topic: Honda CB1 Project Bike  (Read 258 times)
Evan G
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« on: September 11, 2020, 05:37:51 PM »

Hi Everyone, I am new to this forum and wanted to share a picture of the CB1 that I did a restomod on over the past year. I entered it in the builder competition at the 2020 Motorcycle Supershow in Toronto, which it earned a top 10 finish in the cafe racer category.


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« Last Edit: September 18, 2020, 08:03:14 PM by Evan G » Logged
Evan G
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« Reply #1 on: September 11, 2020, 07:12:12 PM »

The swing arm and seat frame were in the design phase at this point of the build.


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Evan G
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« Reply #2 on: September 11, 2020, 07:18:03 PM »

With all frame modifications completed, it received the new paint colour and final assembly began.


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Evan G
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« Reply #3 on: September 11, 2020, 07:27:53 PM »

Frame ready for paint.


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Sugs
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« Reply #4 on: September 12, 2020, 09:48:21 AM »

Nicely done!
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1979 Honda GL1000 Goldwing - 1990 Honda CB1
a_morti
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« Reply #5 on: September 12, 2020, 02:14:23 PM »

She's a beauty!
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stussels
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Finally! HondaCB1.org is here!


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« Reply #6 on: September 14, 2020, 01:05:53 PM »

very nice
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'90 CB-1
eyhonda
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« Reply #7 on: September 16, 2020, 09:16:41 PM »

Great job there!  Do you have a detailed build sheet or a build summary?
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Evan G
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« Reply #8 on: September 17, 2020, 10:37:11 PM »

Hi eyhonda,
Thank you for asking. I have additional pictures of the bike, as well as a detailed description of the work I did that will be posted this weekend.

Thanks,

Evan


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« Last Edit: September 18, 2020, 09:27:28 PM by Evan G » Logged
VintageHunter
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« Reply #9 on: September 18, 2020, 01:09:41 PM »

Evan, please....I MUST have high res photos of this gorgeous creation of yours...
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Evan G
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« Reply #10 on: September 18, 2020, 04:16:12 PM »

Thank you everyone for the compliments,
VintageHunter how would you like me to send the pictures?, i will be posting more to the forum this weekend or i can send them directly to you. Im new to this whole forum thing so im not sure how i send pm's or reply to messages directly

Evan G
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VintageHunter
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« Reply #11 on: September 18, 2020, 05:32:57 PM »

PM'ing my email so you can send it there.
I so so love your design.
when I recieve my uncles inheritence.....you sir, will be the first one I offer a bag load of cash to......................

check yer PM
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Evan G
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« Reply #12 on: September 18, 2020, 05:43:16 PM »

Haha well i do love CASH!! I will shoot some off to your email tonight.

Evan G
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Evan G
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« Reply #13 on: September 18, 2020, 09:37:37 PM »

Particular aspects of this build centered specifically around the suspension and chassis. The motor remained stock, at least for now. The only original parts that exist on this build are the motor, gas tank and a portion of the frame. Everything else was procured from other motorcycles or designed & built by us.

The four most significant changes we made were the suspension, swingarm, frame and bodywork. We wanted to produce a bike which enhanced the handling by incorporating modern wheels, brakes and suspension. We wanted to reduce the weight by removing all unnecessary items and/or replace them with trimmer and more asthetically pleasing components. We also wanted to clean up the lines of the bike and give it a leaner look. Creating a large gap between the rear wheel & seat or the motor & exhaust pipes creates what we feel is a stealthly look. We wanted the bike to look like it was going 100mph standing still. In our opinion, we believe we acheived that and more.

A considerable amount of time was spent working out how we wanted the bike to look, then set out to find the components that would satisfy that requirement. We purchased the complete front end and rear wheel from a 2009 Kawasaki ZX6R. Although it's not necessary on such a light motorcycle, the bike now has a massive 180mm Pirelli Rosso tire on the back and proportionally sized tire on the front. This gives the bike a very solid looking stance as well as the ability to stick like glue in the corners.

We purchased a near complete rear seat assembly from a 2016 Kawasaki Ninja 300. Pieces not available to finish the tail assembly where designed and 3D printed by us. We had to bridge the gap between the tail bodywork from the Ninja 300 and gas tank on the CBI. We spent many hours working out the design in Fusion 360 before settling on the end result you see on the bike today. The only thing we would do differently is use an alternative grade of plastic to avoid the distortion we are experiencing on the exisiting side covers. Additionally, we had to fill the gap between the tail assembly and seat rails we fabricated. These pieces were also designed and 3D printed by us.

Our 3D plastic printer is not the largest nor the fastest, but we can produce some wonderful work with it and apply this technology to wide array of applications, such as instrument housings, velocity stacks, side cover tabs, to name a few.

The creation of the seat frame presented two unique challenges. We had to reverse engineer the tail assembly from the Ninja 300 to establish the design of the seat frame to accomodate the mounting points on all the plastic parts and seat bases. We also needed to figure out where to place all the electrical components. In Honda's wisdom, they placed a majority of these components in the tail assembly. In our effort to create the lean stealthy look we were to acheive, we needed to find a new location for all these items. We found that place under the gas tank.

We did away with the stock air box and ducting by replacing these items with individual K&N air filter pods. This created the room we needed to place all the electrical components under the tank. We also replaced the stock battery with an Anti Gravity brand and found a home for it under the tank also. The only component that remains in the tail is the voltage regulator. Considering it needs to remain cool, we felt that was the most appropriate place for it.

In addition to relocating the electrical components, we replaced the plastic coolant reservoir with an aluminum one we fabricated, brush finished and fitted under the radiator. This enabled us to tidy up the area around the rear shock, which is now is very prominent. With the spring painted bright yellow it only adds to that prominence.

We replaced the swing arm with one we designed and fabricated to accomodate the wider wheel from the ZX6R. The wheelbase was also increased by 1.00" purely for asthetic reasons. This increased the gap between the the rear wheel and frame, enhansing the light stealthy look.
The shock lug on the swingarm was also made less chunky to help acheive the same goal.

The stock foot pegs were modified to eliminate the solid heel plates. The stock one on the brake side provided a mount for the rear master cylinder. With the heel plate gone, we fabricated and grafted a mounting bracket for the master cylinder onto the stock footpeg bracket. The heel plates were replaced with lighter versions we fabricated from thinner aluminum sheet, then drilled an array of holes into them for further lightness.

The stock instruments were replaced with an LCD display. We designed and 3D printed a housing for it so we could integrate it with the top triple clamp. The headlight & turn signal bracket was replaced with pair of smaller brackets that clamp onto the fork tubes. We installed smaller and much more discrete LED turn signal lights front and back.

Once all the fabrication and integration work was done, we needed to establish what colour scheme the  bike was to adorn. Our personal philosophy is to incorportate no more than four dominant colours. There may be small additions of other colours, but must be relegated to modestly sized components, fasteners and similar items.

The four dominant colours on this bike are grey, red, black and aluminum.The tank and tail was painted Audi nardo grey. The frame was painted bright red. Custom made Honda CB400F stickers for the tank and tail were made to compliment the colour scheme. The engine was painted matte black along with the decorative aluminum plates on each side of the head set. Exposed edges of these plates were brushed to expose the aluminum underneath.


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Evan G
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« Reply #14 on: September 18, 2020, 09:40:05 PM »

These are a few close ups of the specific modifications we made, as described in the previous post.


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