Topic: trying to buid a CR 750 look alike

[silvercr750]

Hi there,

My name is Coos and I'm from the Netherlands.
After a few years in motorracing with my sons I now have more time for myself.

So I decided to build me a bike and I fell for the Cr750.
In my profile you can see where I started with, a nice and good looking CB750 K6 from 1977

Not planning to make it a replica but the looks of a CR with some personal items.
Fairing, tank, seat and wheels will look as the factory Cr750

Frontfork, clip-ons, handles and some small parts will look as I like it.
For example the frontfork will be from a NSR250 and the brakes come from a CBX1100 blackbird!

Hope to learn from you all and I like your input on the bike.

I must learn how topost pic's here but w'll see.

greetings
Silver CR750

[silvercr750]

trying te post some pic's

the beginning. Isn't she a beauty?

By silvercr750 at 2009-07-18

[silvercr750]

starting to remove the parts.

By silvercr750 at 2009-07-18

and shortening the rearfork by 4 cm

By silvercr750 at 2009-07-19

then removing all brackets from the frame

By silvercr750 at 2009-07-18

[silvercr750]

bought me another "snotter" CB for parts and more.

By silvercr750 at 2009-07-23

[Sam Green Racing]

Welcome to the forum cloggie, An early K swing arm would have saved you some chopping.
There are quite a few of your fellow country men on here, look out for Rob (voxonda) He has a wealth of knowledge.
Now get in the yard and get  all them leaves cleaned up.

Sam.

[Bill/BentON Racing]

You going to run those pipes I KNOW!!! Welcome,lots of good info here. Bill

[silvercr750]

Hi there Sam and Bill,

Thanx for the welcome.
From the leaves you can see wenn I started this. Autum 2009.

And the man I bought this bike from told me these are the 1969 original pipes. (from a Scania320)

Here are  some parts I found while searcing.
35 mm Clip-ons

By silvercr750 at 2009-08-03

Alu air-inlets

By silverCR750 at 2009-07-31

35 mm steeringdamper-bracket

By silvercr750 at 2010-01-09

[Howell]

Hi there,

My name is Coos and I'm from the Netherlands.
After a few years in motorracing with my sons I now have more time for myself.

So I decided to build me a bike and I fell for the Cr750.
In my profile you can see where I started with, a nice and good looking CB750 K6 from 1977

Not planning to make it a replica but the looks of a CR with some personal items.
Fairing, tank, seat and wheels will look as the factory Cr750

Frontfork, clip-ons, handles and some small parts will look as I like it.
For example the frontfork will be from a NSR250 and the brakes come from a CBX1100 blackbird!

Hope to learn from you all and I like your input on the bike.

I must learn how topost pic's here but w'll see.

greetings
Silver CR750

This is a welcome in dutch , I know Coos from a dutch forum.

Welkom Coos,

Je komt elkaar ook overal tegen.
Ga deze mensen niet wijsmaken dat je een CR replica bouwt want dan gaan ze over je heen vallen.
Er zitten hier echte kenners !
Er zijn zoals je misschien al hebt gezien diverse topics over.
Ook de bouw van onze CB500 racer staat ergens , ik update dat hier nog regelmatig: http://forums.sohc4.net/index.php?topic=63228.0


gr.René

 

[silvercr750]

Hoi René,

Going to Dahlemer Binz next weekend?


After learning what the prizes are for CR-parts I said to myself; I'm going to build some parts myself.
As it won't be a correct replica this would fit into my build.

So I took the oiltank from the Tamiya 1 ; 6 and converted them into real life.
After an few evenings of welding en grinding this is what came out.

By silvercr750 at 2010-01-09

Also the bracket for the rev-counter and oil-pressure was to be build myself.

By silvercr750 at 2010-01-09

By silvercr750 at 2010-01-09

More parts where needed and a few extra frame parts.

By silvercr750 at 2010-01-09

[sangyo soichiro]

trying te post some pic's

the beginning. Isn't she a beauty?

By silvercr750 at 2009-07-18

I've never quite seen a bike like this before.  Almost a shame to cut it up.  I do hope you keep the seat.   

I love the CRs also.  I can't wait to see what you come up with.

[silvercr750]

Hi there Soichiro,

Yes I know, with pain in my heart I dicided not to keep the bike in this A1 status. (the exhaustpipes weigh 9 kilo  )
We did have a lot of people looking at the bike when we drove it home on an open trailer.

The seat was made from a Rabbitskin, it's hair was found all over the bike.

All in all the only parts I used for this project are the frame, engine with carbs and a few electric parts.

we'll see what is coming out in the end.

see you Coos

[Howell]

Hi Coos,

Indeed we go to Dahlemer Binz next weekend, I am curious about the track.
It's an airstrip.

gr.René

[silvercr750]

hi there,

Next I bought me a steering-damper, sorry no original but a WP.
Looking good and doing its job

By silvercr750 at 2010-01-09

And for the frontfork a bought me a set of valves and a stabilizer.

By silvercr750 at 2010-01-15

By silvercr750 at 2010-01-11

Now I wanted to lower the front of the bike for better cornering.
this is to lower it by 2 cm

By silvercr750 at 2010-01-11

[silvercr750]

Oh and I had de decalls made.
Like 'm white.

And the Japanese signs says 'KAI-ZEN'
This is the slogan used for always trying to make things better, more beautifull and/or stronger. We also used it in our raceteam.


By silvercr750 at 2010-08-20

[Sam Green Racing]

White normaly reffers to VIRGIN in European, keep up the good work.

Sam.

[silvercr750]

Hi Sam

I like virgins. Some even race in white ;-). like our Wil Hartog.

By now I was looking for footpegs.
I found a pair that needed some work and changes.

By silvercr750 at 2010-03-01

The brakepedal had to be shaped in form.

By silvercr750 at 2010-01-10

To fit the oiltank it was nessesary to fabric a new framebracket
So another evening in the garage.

By silvercr750 at 2010-01-11

[Sam Green Racing]

Looking good Coos, Willy Hartog was my hero, who else would have the balls to wear white leathers.

Sam.

[silvercr750]

Hi there

By then it was time for the seat.
Original ones are hard to find and expensive.
So I bought a look a like.

But this one needed some modelling to get it in the right shape.

By silvercr750 at 2010-01-20

I  cut it open and removed 1,5 cm from the back

By silvercr750 at 2010-01-25

It also was to narrow so a few more cuts were needed to get a better shape

By silvercr750 at 2010-01-26

All in all a few evenings of work for the final result

By silvercr750 at 2010-01-30

see you for now

[Sam Green Racing]

Cool Coos, I'm looking forward to how this one turns out.
The differences between a 970 kit bike and the Daytona bikes are vast, everybody had their own take on this, it's going to be interesting to see how this one turns out.
The four Daytona bikes all looked much the same but kit bikes looked like how much you could afford to spend on them because you could buy as much or as little of the race kit as you liked to do the transformation.
When you look at the 69 Bol d or wining bike, it looked nothing like the Daytona bikes or the Sumia bike that won the Suzuka 8 hour race.
At the time, parts were not for sale untill the race kit was released to the general public.
After that, you had your choice. Who's to say what your bike should look like.
I still have some pictures of Mr Matsuda in black and white working on the Bol d or winning machine in testing at Oulton Park.
The bike was put together by Mr Matsuda, the designer of the CB750 motor and my mate Steve Murray at Bill Smith motors in Chester. If you want a copy of this picture it is cost of postage only.
Steve is still active and is crewing for me at my next outing at Houghton Tower in September, anyone in the UK is welcome to join us. The date is the  26th September, every body welcome.

Sam.

[kos]

Here is a photo of the most complete CR750 ever built up from original CR "970" parts It took me 25 years to find the parts to build this bike. This is not a replica...this is a complete kit bike. NOTE: For this picture at Barber Museum the bike has the later 22 liter tank that was offered in 1973.

KOS
M McGrew
M3 Racing USA

[kos]

For the record...here is one of the Daytona 1970 Honda factory RC750 works bikes just after being unloaded and uncrated in Gardena, California. Numbers have not even been applied. This is a REAL RC750, one of 4-5 that made the trip to America for the big race.

The difference to the novice eye.... is the rear seat is totally different than "kit" parts.

KOS
M McGrew
M3 Racing USA

[Sam Green Racing]

Here is a photo of the most complete CR750 ever built up from original CR "970" parts It took me 25 years to find the parts to build this bike. This is not a replica...this is a complete kit bike. NOTE: For this picture at Barber Museum the bike has the later 22 liter tank that was offered in 1973.

KOS
M McGrew
M3 Racing USA

Probably the nicest one built that don't claim to be the Mann bike despite the #2.
Cool Mark.

Sam.

[kos]

Yes, Barber's decided to put that number on there...I cannot say they are wrong as they paid the money to own it and can do what they like with their bike...but I would not have put #2 on that bike.

Thanks!

Mark

KOS

[silvercr750]

Hi there,

As I read here it was all the same back then as it is now.
When you are really racing your bike, your money is the limmit how to build-up your racebike.

I have contact with Henk van de Mark, the first Dutchman ever to win the 24-hours of Le Mans in 1984.
He told lots of story's how, in the beginning, they rode the bike to the race, deleted the lights and mirrors and raced it.
Many parts where handmade and tested in the races. If it broke they knew the next one should be stronger.
No bike looked the same.

My son has raced over here in the Netherlands in the 250 class. He made it to be the last 250 Dutch champion.
We had the benefit to race with a 2003 factory kit-engine. These engines where never for sale and only if you have very good contacts you may find such a part (read; buy on the grey-market for lots of money)
Also the magnesium carbs could only be leased for loads of yens.
A one of a kind WP-frontfork, build specially for our bike, same as the one Chris Vermeulen raced in his Ten Kate-Honda.
A suitcase full of VHM cilinderheads in all sizes for all kind of diverend temperatures and weathercondions
So even in these times the bikes all are diverend and the connections you have make your bike.

As to my build. I'm not willing to spend thousands of euro's on this bike.
I want to put as many work of myself in it so it's a one off.

When people are trying to build a copy of the 1970 Dick Mann bike, such as Nap over here, I can really like this.
I can enjoy looking at the bike and all those original parts and little changes there are.

Kos, the bike on your pic is a real beauty.


Off topic but here a little pic from my son Mark on his Honda.

By silvercr750 at 2010-08-24

[silvercr750]

Hi Sam ,

I would love to come to your next outing but my son's birdsday is on 27 september. Hopefully another time.

And now back to the build.

The wiring was next on the list. Not my favorit chapter but it had to be done.
Started with a CB750 cable and an Aprilia RS125 cable (my other son, Freek, raced in the Juniorcup in Holland and Germany)


By silvercr750 at 2010-02-07

By silvercr750 at 2010-02-07

It became a real puzzle with an mountain of wires and tiny parts to fit in.
I wanted to get the wiring out of sight.
At last it was possible to get the electric parts under the fueltank.
And the weight reduced to half of the original one.

By silvercr750 at 2010-02-10

By silvercr750 at 2010-06-12