Author Topic: CR750 replica build  (Read 11029 times)

Offline MarkCR750

  • Professional half wit and member
  • SOHC Pro
  • Posts: 978
    • View Profile
Re: CR750 replica build
« Reply #120 on: October 04, 2017, 08:25:00 PM »
Here's a link to H2erics build, another fine piece of work, if I remember correctly he even had Magnesium sliders made!, could be some useful info in there for you 👍

http://forums.sohc4.net/index.php?topic=94588.0
Ducati Scrambler 803.
1977 K7 CR750 lookalikey
Ducati 900SS
CBR1000F
"Eff yir gitten awvestear yir gooin te farst"
Sir J.Stewart.

Offline CR21

  • SOHC Member
  • Posts: 131
    • View Profile
Re: CR750 replica build
« Reply #121 on: October 05, 2017, 08:02:26 AM »
Here's a link to H2erics build, another fine piece of work, if I remember correctly he even had Magnesium sliders made!, could be some useful info in there for you 👍

http://forums.sohc4.net/index.php?topic=94588.0

Hi Mark,

Eric's thread is fantastic, and is a great reference point and source of inspiration! When I started thinking about the build it was this forum and that thread that made my mind up  :) I have been in touch with Eric via PM, a great help  ;D

Cheers,
CR21

Offline CR21

  • SOHC Member
  • Posts: 131
    • View Profile
Re: CR750 replica build
« Reply #122 on: October 09, 2017, 04:54:16 PM »
Quick update:

Repro master cylinder suitable to run the double disk arrived, fitted with the replica bolts, I also dropped the clutch lever on to have a look!








Got to do the mods to the master cylinder:
- Remove ridges
- Remove mirror mount
- Remove some casting marks
- Replace with a more original looking cap

I will also linish the tube weld back and paint these clip-ons black and finish them with a turned nylon end cap.

I should be picking up some goodies at the weekend for the CR  ;)

Cheers!
CR21

Offline CR21

  • SOHC Member
  • Posts: 131
    • View Profile
Re: CR750 replica build
« Reply #123 on: October 11, 2017, 01:56:07 PM »
Quick update on some very tiny details!

I have been looking for a more period style filler cap for the oil tank. The Monza is pretty and shiny but does not look that original, it is also difficult to open when the seat is in place. After seeing a CR kit bike with a filler cap on that closely resembles the GL1000 fuel cap that is what I have decided to go for:



Once this arrives I will make an aluminium neck to be welded to accept this cap. 


The other thing is the seat fasteners, the ones that came on the seat were not quite right, they looked ok but let down the rest of the seat in my opinion as they are too bulbous:



The Honda seat studs, found on the CB400F do the trick and make the seat look a little less bling as the studs are less polished:



It's the small things... :)

Cheers!
CR21
« Last Edit: October 11, 2017, 02:01:50 PM by CR21 »

Offline CR21

  • SOHC Member
  • Posts: 131
    • View Profile
Re: CR750 replica build
« Reply #124 on: October 14, 2017, 09:07:23 PM »
Had a good wander around Stafford today! Met up with some good contacts, especially for the Yam project.

Also met up with a CR guru and purchased these bits:

Sand-cast side cover and fuel tap:












Venhill '888' quick action throttle:



The side cover is just a rough casting so needs a lot of loving, however apparently they were pretty poor when supplied new in the kit in the 1970s. I will trim off the gates and sprue, fly cut  a face seal and drill for bolting on. I would like to CNC my own one of these but that will have to go on the back burner for now.

The fuel tap, is ready for bolting on! I am still going to machine one of these though.

And the throttle, its a starting point. I will either run this as-is but stripped of the anodising, vibro-polished add with some period fastenings. Or I am going to make a new throttle as a replica of the original kit style one.

Cheers
CR21

Offline philward

  • SOHC Pro
  • Posts: 728
    • View Profile
Re: CR750 replica build
« Reply #125 on: October 14, 2017, 09:11:29 PM »
Had a good wander around Stafford today! Met up with some good contacts, especially for the Yam project.

Also met up with a CR guru and purchased these bits:

Sand-cast side cover and fuel tap:












Venhill '888' quick action throttle:



The side cover is just a rough casting so needs a lot of loving, however apparently they were pretty poor when supplied new in the kit in the 1970s. I will trim off the gates and sprue, fly cut  a face seal and drill for bolting on. I would like to CNC my own one of these but that will have to go on the back burner for now.

The fuel tap, is ready for bolting on! I am still going to machine one of these though.

And the throttle, its a starting point. I will either run this as-is but stripped of the anodising, vibro-polished add with some period fastenings. Or I am going to make a new throttle as a replica of the original kit style one.

Cheers
CR21
Who did you get the tap from Scott?

Sent from my MotoG3 using Tapatalk

Current Bikes:-
Kawasaki ZZR1100D3
Honda CB750K2
Honda CR750 project

Offline CR21

  • SOHC Member
  • Posts: 131
    • View Profile
Re: CR750 replica build
« Reply #126 on: October 14, 2017, 09:14:02 PM »
Who did you get the tap from Scott?

Sent from my MotoG3 using Tapatalk

PM sent  :)

Offline CR21

  • SOHC Member
  • Posts: 131
    • View Profile
Re: CR750 replica build
« Reply #127 on: October 17, 2017, 09:22:09 PM »
Hi Kawa, its works and looks well, but I just dont think it looks period enough for the CR...

Anyway, super quick update:

To fit the GL1000 filler cap I need to make up a filler cap bezel to weld to the oiltank. 



Mocked one up in CAD, and sent it to print yesterday:





The reason for printing this is to test the design against the compression of the spring, before committing to turning/milling one in aluminium. Update on the fit tomorrow!

Cheers
CR21

Offline Bryanj

  • SOHC Jedi
  • Posts: 4571
    • View Profile
Re: CR750 replica build
« Reply #128 on: October 18, 2017, 06:18:08 AM »
It arrived OK then?

Offline CR21

  • SOHC Member
  • Posts: 131
    • View Profile
Re: CR750 replica build
« Reply #129 on: October 18, 2017, 06:53:19 AM »
It arrived OK then?

Yes thanks. I sent you an email on Monday  :)

Offline CR21

  • SOHC Member
  • Posts: 131
    • View Profile
Re: CR750 replica build
« Reply #130 on: November 01, 2017, 09:52:14 AM »
A quick update. Some small parts machined up:

Gear changeover bush to hold the olive:





Seat hooks for welding onto the cross brace:



Front brake splitter:




Cheers,
CR21

Offline captaink

  • Old racers never die. ' they just go faster '
  • SOHC Expert
  • Posts: 259
    • View Profile
Re: CR750 replica build
« Reply #131 on: November 10, 2017, 02:03:41 PM »
Fuel Tap of great interest
may I ask where it comes from ?
CR750 Replica
Norton Manx's 1947 & 1956
Norton CS1 1930
Norton International  1934
Norton 16H 1924
Norton Model 18 1929
Norton Commando / Colorado Norton Works
Triumph 1947 GP Replica
Triumph Bonniville 1967
BSA Goldstar Daytona 1956
Harley Duo Glide 1961
The Rickman project
And the CR dick Mann replica project
Sold a few of the Bikes so only got these left
Gt40...Car I know
E type fhc 1964... Car I know


" Greedy I Know

Offline CR21

  • SOHC Member
  • Posts: 131
    • View Profile
Re: CR750 replica build
« Reply #132 on: November 10, 2017, 02:36:19 PM »
Fuel Tap of great interest
may I ask where it comes from ?

pm sent :)