Author Topic: CR750 replica build  (Read 33021 times)

Offline Trigger

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Re: CR750 replica build
« Reply #105 on: September 25, 2017, 08:28:03 PM »
Nice work, fancy making some new cam towers  ;) Can't find a company that will do a small amount, everyone that has the correct CNC only do large orders.
I'm no expert Graham but in the 90s I had a Phil Read Rep with cam towers that where goosed - had them line bored and had some shells made for bottom of towers and complete new phosy bronze caps made that 'clamped' in the bottom shell's - not standard spec but worked for several thousand miles while I had it - hope that makes sense after several Madererian beers on holiday!

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I know this method Phil, but it also weakens the towers. At this time we line bore the towers and metal spray the journals on the cam shaft and then grind to fit. This can only be done it the tower has only had minimum damage. 

Offline philward

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Re: CR750 replica build
« Reply #106 on: September 25, 2017, 08:40:14 PM »
That's me told - back to my beer! No seriously, when I did mine, I was able to machine can bearings slightly to get any wear marks out then have them case hardened then machined towers/caps to suit - it's all down to budget I suppose - I was working at BAE at the time and cost nothing! Now back to the Madererian beer!

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Current Bikes:-
Honda CB750K2 (1975)
Honda CB500K2 (12/1972)
Honda CR750 Replica (1972)
Honda CB350K0 (1969)
Kawasaki ZZR1100D3 (1995)
Kawasaki ZZR250 (1990) Project (Going on eBay ASAP)

Offline Trigger

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Re: CR750 replica build
« Reply #107 on: September 25, 2017, 08:49:54 PM »
That's me told - back to my beer! No seriously, when I did mine, I was able to machine can bearings slightly to get any wear marks out then have them case hardened then machined towers/caps to suit - it's all down to budget I suppose - I was working at BAE at the time and cost nothing! Now back to the Madererian beer!

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How many beers now mate ?

Offline philward

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Re: CR750 replica build
« Reply #108 on: September 25, 2017, 08:56:39 PM »
About 6 since 3 ish but now having Madererian meal ( restaurant within all inclusive hotel) - but had a few before that around the pool  - it's a hard life!

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Current Bikes:-
Honda CB750K2 (1975)
Honda CB500K2 (12/1972)
Honda CR750 Replica (1972)
Honda CB350K0 (1969)
Kawasaki ZZR1100D3 (1995)
Kawasaki ZZR250 (1990) Project (Going on eBay ASAP)

Offline MCTID

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Re: CR750 replica build
« Reply #109 on: September 25, 2017, 11:07:37 PM »
Coral..........splendid Madeiran Lager (multi award winning........I know these things....I'll be there for the 12th time soon). Enjoy. LOL.
Now: 2008 CB1300S, CB750K4, 1970 Bonneville. Various other 1960's 650 Triumph T120's/ TR6's/ TR6C's (all in bits...many, many bits unfortunately). Previous: 2007 CB600FA, 1976 CB500 Four. BMW F800ST. GS750E. ZZR1100. CB1300 (2). ZXR1200S. VFR800. CB750 Nighthawk. CX500. XS500 Yam. Suzuki GT500. BSA A10. Various Lambrettas. Zundapp Bella (honest).

Offline CR21

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Re: CR750 replica build
« Reply #110 on: September 27, 2017, 09:40:04 AM »
Quick update:

Parts together and ready for welding. A quick side-by-side shot with an original HRC part:







I think I am going to make a second set of these from a high grade of Aluminium, as soon as I am happy with the design and fit.

Cheers
CR21

Offline CR21

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Re: CR750 replica build
« Reply #111 on: September 27, 2017, 09:40:28 AM »
A quick bit of progress on the front brake splitter assembly design:



I still need to add some location grooves for the wire clip.

Cheers,
CR21

Offline CR21

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Re: CR750 replica build
« Reply #112 on: October 03, 2017, 02:12:22 PM »
Quick update on the clip ons!

My master welder friend has assembled the clip ons :) All good to go now:









Cheers
CR21

Offline MarkCR750

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Re: CR750 replica build
« Reply #113 on: October 03, 2017, 05:03:38 PM »
Looks really good, this thread is going to be a terrific reference for people currently building or about to build a CR750, keep it up👍
Suzuki GT250A (Nostalgia)
1977 K7 CR750 (lookalike, what of I’m not sure)
Ducati 900SS (Soul & Speed)
Ducati M900 Monster (Handling & character)
Thruxton 1200 (suits me)
James Captain 197 (pure adrenaline, i.e. no brakes!)
"Eff yir gitten awvestear yir gooin te farst"
Sir J.Stewart.

Offline CR21

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Re: CR750 replica build
« Reply #114 on: October 03, 2017, 05:25:39 PM »
Looks really good, this thread is going to be a terrific reference for people currently building or about to build a CR750, keep it up👍

Thanks Mark  :)

Offline JamesH

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Re: CR750 replica build
« Reply #115 on: October 03, 2017, 06:44:23 PM »
Awesome...

Offline Johnwebley

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Re: CR750 replica build
« Reply #116 on: October 03, 2017, 08:40:30 PM »
the attention to detail,and workmanship is outstanding,

  looking forward to the finished bike running
lifelong motorcycle rider,and fan

Offline philward

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Re: CR750 replica build
« Reply #117 on: October 03, 2017, 09:01:28 PM »
the attention to detail,and workmanship is outstanding,

  looking forward to the finished bike running
Great work - your setting very high standards Scott!

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Current Bikes:-
Honda CB750K2 (1975)
Honda CB500K2 (12/1972)
Honda CR750 Replica (1972)
Honda CB350K0 (1969)
Kawasaki ZZR1100D3 (1995)
Kawasaki ZZR250 (1990) Project (Going on eBay ASAP)

Offline CR21

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Re: CR750 replica build
« Reply #118 on: October 04, 2017, 08:28:32 AM »
Thanks, guys. When I committed to building a replica that was the plan; to build the bike to the highest standard, quality and detail that I can afford. Working away on these small details seems trivial but fingers crossed it will all come together  :)

Cheers
CR21

Offline paul G

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Re: CR750 replica build
« Reply #119 on: October 04, 2017, 12:22:58 PM »
Stunning work all the way.
Can't wait to see the finished item :) :)
Honda CB400 4
Honda CB550 K3 (sold)
Honda CB750 UK K1
Kawasaki Z650 C2
Kawasaki Z650 cafe racer (Sold)
Honda CD175 sloper

 

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