CR 750 for road use build

[captaink]

Dummy engine has been installed

[captaink]

More pictures although they may not be in the correct sequence

[CR21]

Progress is looking great  Keep the posts coming!

Cheers,
CR21

[captaink]

Acquired a 1977 rear hub and brake assy.
Stripped, part polished and rebuilt with all new bearings, shoes and seals.
Only problem I had was a dodgy bearing retainer that had to have heat, wd40 an brute force to remove. The David Silver replacement was troublesome as well in that the old retainer had a small taper at the start of the thread and the new one never which was impossible to start on the carrier internal thread. For now the old retainer is back in and Ill have to talk to Silvers.
Nevertheless no big deal its 40 years old.
The trial fitting to the frame was OK so very soon the hub will go of to Hagons for a new wheel and spokes ( current waiting 6 weeks i'm told )

[captaink]

Rebearing of the sprocket carrier and all new brake parts

Rear wheel spindle spacers are in good order but I will make 2 new ones in stainless steel

[captaink]

I'll need to make an ally brake cable mount and weld this to the brake plate.
Original brake rod will now be a cable.
There were wear marks on the hub left by the spokes, even though the wheel was 17" and now will be 18" the new spoke should cover the marks.
To machine the drum down on the lathe could be done but may weaken it so I'm leaving be.

[captaink]

Trial fitting of the hub assy
Clip on and brake master trial fitting

[captaink]

I'm looking for a 4 -4 exhaust system in mild steel available in the UK ?
I know Cycle X do them and this may end up being the answer in the end.

They also do an oil filter combo to replace the existing oil filter housing with a spin on filter, any UK suppliers or anyone using or used one before ?

any assistance appreciated.

Suzuki performance parts do a CB750 4-2 full system but not sure at present what the quality is like. I need one for my Rickman CR750

[captaink]

The engine I have acquired for the CR replica is a 1977 and progress so far is that it has been striped, cleaned and inspected.
The cases appear to be in very good condition except the oil filter thread in the lower case, its ok but not perfect so its going to have to have an insert fitted.
The crankshaft and bearing match up has been a real eye opener and taxed my small brain but I think I'm there now.
Crankshaft micrometer readings, bearing colours seem ok now.
Head has gone to D & M Engineering for new guides to be fitted, new valves and springs.
Cylinder has already been bored to 836cc with a Wiseco big bore kit, cam polished.
I removed the original cylinder studs quite easily and replaced with APE studs and new APE crankcase mains studs.
 

[captaink]

few more, everyone likes a picture 

Old studs removed with a blow lamp, WD40 and two 8mm nuts, some needed a little help with the mole grips as well.
New ones back in with a small thread dipping in wd40 and torque up using two 8mm nuts.

[CR21]

Great post! Check out Lordmoonpie exhaust pipes!

Cheers,
CR21

[philward]

Heres the link - http://www.moonpie.co.uk/html/cr750_resource_page.html
The next stage of my build is making my set fit - they are not bolt on. You will need (like me) to fabricate baffles as they are straight through and will struggle to pass an MOT! DB killers may do but will only knock a few decibels off.
Phil

[captaink]

Been having a few issues in my head with the crankcase numbers/ crankshaft numbers / bearing colours / journal sizes  but seem to have got there in the end although for some reason or not the oil clearances are higher than the manuals say   
My engine man doing the rebores etc says not.....confused dot.com. 

anyway now I'm looking at journals and oil clearances that are at least consistent but I need Black shells to achieve this and I believe there within the limits
Plastigauge confirms the following clearance
Main bearings between 0.038mm - 0.040mm 
Rod bearings 3 @ 0.040mm and 1 @ 0.043mm 

[captaink]

No disrespect but what is the quality like of the moonpie exhausts, are the bends consistent and nicely done.
I'm a fussy git, perhaps too fussy.
Has anyone fitted a set and what is there honest opinion.

[SteveD CB500K0]

Simon Tappin (LordMoonPie) is a member her http://www.sohc.co.uk/index.php?action=profile;u=313

He hasn't been online for over three years, but I'm sure he'd appreciate a call

Steve