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Author Topic: Bimota HB1 Clone build  (Read 68137 times)

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Offline Artracing

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Bimota HB1 Clone build
« on: February 20, 2016, 01:55:00 PM »
Someone started a thread about my Bimota HB1 build and member 754 suggested  I post the project here.

I'm building a 74-75 Bimota HB1 clone with full custom frame. I have been slowly working on it since last March 2015.
The frame build will start in next few weeks by my buddy Karsten at Frame Crafters in Illinois, USA,
 
There have been some CB550 make overs kits, using a tank and seat like the HB1, so it looks like a HB1, but is not very true.

This will be as close to original as I can get with a few items making it my one. The fact that this was originally a kit,(Bimota first bike) there are some parts that were up to the builder. The kit was frame, swing arm, fiberglass tank and seat. Kit was built for CB750 engine.

Builders typically used Ceriani triple tree and forks with Fontana calipers. I had to forego the Fontana's and went with Brembo due to cost.

Here is a photo of one the originals HB1

By the way. Only 10 were ever built.

I am not an expert on HB1, so anyone with experience with this bike, please feel free to precipitate.

Rob




 
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Offline Artracing

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Re: Bimota HB1 Clone build
« Reply #1 on: February 20, 2016, 01:59:34 PM »
Here is the tank and front fender. Seat is also carbon fiber. I stepped it up and went carbon over fiberglass.

Rob

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Offline Retro Rocket

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Re: Bimota HB1 Clone build
« Reply #2 on: February 20, 2016, 03:47:05 PM »
How did you manage to get the correct measurements for the frame..?  You may want to send a message to Ted, Ricky_ Racer on the forum, he knows a bit about these bikes if my memory serves me well....  I did say if... ;D :o

http://forums.sohc4.net/index.php?action=profile;u=639
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750 F1 970cc
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If You can't fix it with a hammer, You've got an electrical problem.

Offline Artracing

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Re: Bimota HB1 Clone build
« Reply #3 on: February 20, 2016, 04:36:26 PM »
That's what reverse engineering is all about. ;D

Thanks for the tip.

Rob
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Offline Artracing

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Re: Bimota HB1 Clone build
« Reply #4 on: February 20, 2016, 04:45:09 PM »
This is my second version of the dash. The idea is to keep a racer look, with emphasis on the tach, but then supply what is needed as a street bike,  in a subtle way.

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Offline Retro Rocket

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Re: Bimota HB1 Clone build
« Reply #5 on: February 20, 2016, 04:47:23 PM »
Quote from: Artracing on February 20, 2016, 04:36:26 PM
That's what reverse engineering is all about. ;D

Thanks for the tip.

Rob

I understand what reverse engineering is but, to do that effectively you'd need a complete frame... Do you have access to a frame..?
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750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
If You can't fix it with a hammer, You've got an electrical problem.

Offline Artracing

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Re: Bimota HB1 Clone build
« Reply #6 on: February 20, 2016, 05:13:16 PM »
I beg to differ. You can be effective either way. Having a frame to copy is certainly easy way, but engineering and experience is still another way.

Sit back and we will show you the magic.

Rob

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Offline Artracing

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Re: Bimota HB1 Clone build
« Reply #7 on: February 20, 2016, 05:18:07 PM »
Here are the wheels.

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Offline seanbarney41

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Re: Bimota HB1 Clone build
« Reply #8 on: February 20, 2016, 06:28:14 PM »
Quote from: Artracing on February 20, 2016, 01:55:00 PM
Someone started a thread about my Bimota HB1 build and member 754 suggested  I post the project here.

I'm building a 74-75 Bimota HB1 clone with full custom frame. I have been slowly working on it since last March 2015.
The frame build will start in next few weeks by my buddy Karsten at Frame Crafters in Illinois, USA,
 
There have been some CB550 make overs kits, using a tank and seat like the HB1, so it looks like a HB1, but is not very true.

This will be as close to original as I can get with a few items making it my one. The fact that this was originally a kit,(Bimota first bike) there are some parts that were up to the builder. The kit was frame, swing arm, fiberglass tank and seat. Kit was built for CB750 engine.

Builders typically used Ceriani triple tree and forks with Fontana calipers. I had to forego the Fontana's and went with Brembo due to cost.

Here is a photo of one the originals HB1

By the way. Only 10 were ever built.

I am not an expert on HB1, so anyone with experience with this bike, please feel free to precipitate.

Rob




 
this bike has gl1000 front end and brakes
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If it works good, it looks good...

Offline Retro Rocket

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Re: Bimota HB1 Clone build
« Reply #9 on: February 20, 2016, 11:56:39 PM »
Quote from: Artracing on February 20, 2016, 05:13:16 PM
I beg to differ. You can be effective either way. Having a frame to copy is certainly easy way, but engineering and experience is still another way.

Sit back and we will show you the magic.

Rob

You do realize that, if you get this right, and I mean as close as perfect as you can, there will be a few people that will want to buy such a frame, the HB1 has been a topic of discussion here for a very long time.... ;D ;)
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750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
If You can't fix it with a hammer, You've got an electrical problem.

Offline Artracing

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Re: Bimota HB1 Clone build
« Reply #10 on: February 21, 2016, 05:44:00 AM »
Quote from: Retro Rocket on February 20, 2016, 11:56:39 PM
Quote from: Artracing on February 20, 2016, 05:13:16 PM
I beg to differ. You can be effective either way. Having a frame to copy is certainly easy way, but engineering and experience is still another way.

Sit back and we will show you the magic.

Rob

You do realize that, if you get this right, and I mean as close as perfect as you can, there will be a few people that will want to buy such a frame, the HB1 has been a topic of discussion here for a very long time.... ;D ;)

Believe me, we will get it right.

The plan is to build and sell the bike. People are waiting already.

Selling as a kit? Maybe, but not right now.

I'll offer the bike with tank, seat and fender as carbon fiber or original paint scheme.

I hope to also do a full fairing as a option. The front fairing mount is already in the plan.

Don't ask for price because I have not crunched the numbers. The bad new is it will be very expensive.
The good news is an original sold last year for $85,000. This will be far from it.

Here is the carbon seat.
 




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Offline Artracing

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Re: Bimota HB1 Clone build
« Reply #11 on: February 21, 2016, 05:51:14 AM »
Since this bike is being made for the street. You need mirrors and turn signals.
The controls are New original CB750, with Tomaselli clip-ons
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Offline Artracing

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Re: Bimota HB1 Clone build
« Reply #12 on: February 21, 2016, 06:00:10 AM »
I could have made a set myself, but out of respect, I thought a nice set of Italian Tarozzi rear set would be appropriate.

Head light is original CB750 housing with tri bar lamp, with Ceriani style mounts.
 
The forks are New  fully tuneable replica 35mm Ceriani.

 
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Offline grcamna2

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Re: Bimota HB1 Clone build
« Reply #13 on: February 21, 2016, 06:40:17 AM »
subscribed  8)
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Offline MRieck

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Re: Bimota HB1 Clone build
« Reply #14 on: February 21, 2016, 07:18:51 AM »
How did you fellas manufacture that oil reservoir which mounts in the filter position?
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Offline bwaller

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Re: Bimota HB1 Clone build
« Reply #15 on: February 21, 2016, 07:57:54 AM »
Good eye Mike. Very nice project Artracing.

Tell Karsten hi from Brent, he's a good guy and a great racer. Cool guy to call friend, he's a talent.
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Offline Stev-o

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Re: Bimota HB1 Clone build
« Reply #16 on: February 21, 2016, 08:09:10 AM »
Interesting project, subscribed.  My buddy has a Bimoto...
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Offline Don R

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Re: Bimota HB1 Clone build
« Reply #17 on: February 21, 2016, 08:24:04 AM »
Wow, I'll follow along.
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Offline Artracing

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Re: Bimota HB1 Clone build
« Reply #18 on: February 21, 2016, 08:26:18 AM »
Quote from: MRieck on February 21, 2016, 07:18:51 AM
How did you fellas manufacture that oil reservoir which mounts in the filter position?

Mike, You hit on the one thing that I can not do at this time. It would be pretty costly , but it's on the drawing table.
I would prefer to build the bike first to engineer it.

Rob


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Offline Artracing

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Re: Bimota HB1 Clone build
« Reply #19 on: February 21, 2016, 08:29:18 AM »
Quote from: bwaller on February 21, 2016, 07:57:54 AM
Good eye Mike. Very nice project Artracing.

Tell Karsten hi from Brent, he's a good guy and a great racer. Cool guy to call friend, he's a talent.

Thanks Brent I will, Karsten and I talk a few times a week.
We are pretty excited about this.

Rob
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Offline Artracing

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Re: Bimota HB1 Clone build
« Reply #20 on: February 21, 2016, 08:33:13 AM »
One of the iconic items for this bike are the axle adjuster. Those are ready to go.
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Offline SOHC4 Cafe Racer Fan

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Re: Bimota HB1 Clone build
« Reply #21 on: February 21, 2016, 11:59:03 AM »
Quote from: MRieck on February 21, 2016, 07:18:51 AM
How did you fellas manufacture that oil reservoir which mounts in the filter position?

Wow, that was not an easy thing to spot, but had me going back to the first photo and scratching my head.

Yeah, how are you guys doing that??
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Offline Artracing

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Re: Bimota HB1 Clone build
« Reply #22 on: February 21, 2016, 01:26:17 PM »
Here is another version of someone's original. This one has mag wheels.
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Offline Artracing

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Re: Bimota HB1 Clone build
« Reply #23 on: February 22, 2016, 01:52:21 PM »
Here we have the Dual Brembo F08 installed to CB750 front hub. Does require wider triple tree.

Rob
« Last Edit: February 22, 2016, 01:56:23 PM by Artracing »
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Offline cbxr750

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Re: Bimota HB1 Clone build
« Reply #24 on: February 22, 2016, 02:12:42 PM »
This should be interesting. Sub'd. Good luck!
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