CB750K8 Project

[JamesH]

That's pretty good. We'll I'll probably photograph them next week and stick them up on evilbay. James.

[SteveD CB500K0]

Every time I see this thread, it reminds me of one of the guys on sohc4.net who rebuilt a K8.

He called it "Kate" (geddit?)

So, are you going to name your bike Martin?

[martin_uk]

Every time I see this thread, it reminds me of one of the guys on sohc4.net who rebuilt a K8.

He called it "Kate" (geddit?)

So, are you going to name your bike Martin?

Well I had Norman the Norton, Tommy the Triumph and  Harry the Honda and as I already had a Katy the Caterham,  thought I would call the K8 that f....ing thing I spend all my time and money on 

[martin_uk]

Cleaned up the cam cover and breather cover and fitted.

Engine is ready to reinstall pending final assembly.

2015_0320eng0005 by nitram2010, on Flickr

2015_0320eng0004 by nitram2010, on Flickr

2015_0320eng0003 by nitram2010, on Flickr

2015_0320eng0001 by nitram2010, on Flickr

[royhall]

Martin. Must have missed it in the thread somewhere. Looks from your last picture set that you repainted the insides of the cases for porosity. Am I correct, and if so what paint did you use. Bikes looking superb by the way. Cheers Roy.

[martin_uk]

Martin. Must have missed it in the thread somewhere. Looks from your last picture set that you repainted the insides of the cases for porosity. Am I correct, and if so what paint did you use. Bikes looking superb by the way. Cheers Roy.

Hi Roy
Not paint, but as the cases were not vapor blasted, some staining remains that did not come off with solvents.

[martin_uk]

Finished the part assembly of engine and ready to fit.

2015_0321eng0015 by nitram2010, on Flickr

2015_0321eng0014 by nitram2010, on Flickr

Frame prepped with pipe insulation and plastic waste pipe split and fitted to right bottom rail to protect

2015_0321eng0016 by nitram2010, on Flickr

Engine went in OK with help of friend on other end of lifting bar, but seem to have lost images

[martin_uk]

Dismantled oil pump.

It doesnt look as if dismantled before, but dot on rotors on opposite sides for first rotor then on same side for second by drive gear?

2015_0321eng0001 by nitram2010, on Flickr

2015_0321eng0009 by nitram2010, on Flickr

2015_0321eng0011 by nitram2010, on Flickr

[Trigger]

That is a very strange way to fit a engine Martin 

[martin_uk]

I bought a K7 brake master cylinder and new genuine stop switch, but no provision for fitting 

Decided to go with replica DSS unit and banjo bolt switch from China, with made up wiring loom.

2015_0321eng0004 by nitram2010, on Flickr

Seems to work OK

[martin_uk]

That is a very strange way to fit a engine Martin 

I know, but its a lot lighter and just means I fit the alternator, clutch and covers once its in.

[martin_uk]

That is a very strange way to fit a engine Martin 

I know, but its a lot lighter and just means I fit the alternator, clutch and covers once its in.

I would add, that I would not do this way without a bike lift that means you can work at bench height when fitting the remainder of parts.

[martin_uk]

Made quite a bit of progress, but seem to have problem importing images from my camera.

Engine fitted up apart from carbs, as just realised the K7/8 had differentent rubber mounts which are on back order

Managed to clear blockage on accelerator jets.

Clutch assembly slightly caught me out as the rear ally plate with the spring pillars had not engaged in outer splines.

So if you find spring bolts seem too short to engage with pillars, may be the problem.

I stripped oil pump and found rotor lobe damage so swapped with a good used one (thanks Bryanj)

Put in engine oil, initial  3 ltrs of running in oil, which should help the rings bed in.

Tried spinning up engine  with plugs out, but no drop in oil level and oil light still on.

Dont like starting without pressure present, but having  prlmed pump, may have to, athough may try pressuring oil tank via beather pipe,  which worked on last bike.

[martin_uk]

Decided to try the method used before to fully prime oil system, I used a car tubeless tyre valve with end cut off and fitted into end of tube same size as breather tube on oil tank  clamped with Jubilee clip.

After pressurising with air line and a few spins of engine the oil light went out.

Removed pressure and oil light goes out each time engine spun

Plugs in and just waiting on DSS supplying the carb mounting rubbers.

As I am missing one standard exhaust, started to fit a new  Motad I bought. but numbering of pipes seems wrong ie 1 is not left front?

[Waggles]

I am afraid I binned the MOTAD instructions so can't confirm but I THINK the numbering was more about where the tube fits into the collector.