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Messages - Northy

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31
Project Board / Re: CB400 Four special (Mr Sinx II )
« on: April 14, 2019, 10:25:39 PM »
Looks the same size I already have ,been looking  for one that wasn't as  so deep so don't have to mount too far forward.

There number around on Ebay ,Chinese specials but there too pointy and low. Found one that might work  ..... I'm a fussy bugger  ::)

Trouble is need to get tank on and ensure  its doesnt foul that or even look too big in scheme of things 

32
Project Board / Re: CB400 Four special (Mr Sinx II )
« on: April 14, 2019, 07:46:16 PM »
Thanks for that , will have re size my photos .......have bad enough time just remembering to take pictures

Anyway , found a tank .....with dents !

Purchased a box section swing arm from Mr Cole from this fine forum ...shame as I will now have to respray it.

Just working on the fairing , have 2nd hand R90s style one but just too big for the 400.....anything else is more money. 

Just testing the picture bit but  my front end  CB400N double discs .....which are rarer then cb400F. (colour might not be to every one taste)

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33
Project Board / Re: CB400 Four special (Mr Sinx II )
« on: April 13, 2019, 08:56:12 PM »
Not missed much ..there must be an easier way of loading photos on this site than Slow and plain photobucket route

34
Project Board / Re: CB400 Four special (Mr Sinx II )
« on: April 11, 2019, 08:40:44 PM »
So what have I being doing !

Well 4  weeks later my two frame and bits arrived back from the coaters but give I was paying mates rates I'll let them off.

Firstly had whack this one together ...come up very nice.




Had already been working on the wheels ....hint of the frame , black center stand is just for the build , will not be fitted to final product



Next engine in frame , the usual trick of everything laying on it side ....pig as the powder coat was tad thick in places



Next up electrics and some wheels etc .
Wiring will be tidied up ass changing all those bullet connectors for multi block ones. 

]

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Note the bars are upright,(no clip-ons)  which its self has caused an issue in that the brake lines purchase a way back for CB400n  are too short, add to fact the top yoke sits a tad taller on Four than the twin as well.

Overall its siting an inch taller than stock ...all part of the plan.

Not sure is to go stock air filter or pod filters , jetting would easier with  stock but would the pod/K&n is keeping with the rest of the bike

Need a tank now ...anyone got an old dented one ? :-\

Just got to purchase new cables, front mudguard  etc , make a seat  and dig deep for a exhaust system (glup   :o)
Oh fix up new cockpit fairing , lights ......will keep me busy. ;D
 




35
CB350/400 / Re: On the road at last!
« on: April 09, 2019, 09:14:04 PM »
Very nice ,simple clean lines .

Where did you get the seat from and I'm looking for one in that style  for my special
 
Northy

It was a pretty ropey Guiliari seat with a rusty base and torn cover.
I shortened it a little at the back and reshaped it then got a local coach trimmer to recover it with a foam hump. I think it looks a bit too big overall but it might grow on me.

Thanks ..looks like I'm going make my own too

36
CB350/400 / Re: On the road at last!
« on: April 08, 2019, 09:06:16 PM »
Very nice ,simple clean lines .

Where did you get the seat from and I'm looking for one in that style  for my special
 
Northy

37
CB350/400 / Re: Fuel Tank Cleaning
« on: March 22, 2019, 10:04:42 PM »
Spirit of Salts or brick acid , I use SOS  cleans it so well  you need to add in caustic soda to neutralise the acid or it gets covered in surface rust instantly . Once the caustic is out then rinse with water , add in petrol/ oil mix.  Best bit its quick , couple of hours tops and cheap £3  for  500ml is more than enough  for one tank. 

38
CB350/400 / Re: Front engine mount stuck
« on: February 21, 2019, 06:43:36 PM »
Soak in diesel for while , then give it lots of heat.  it will move .
Just had the same issues with one of mine

39
Project Board / Re: CB400 Four special (Mr Sinx II )
« on: January 26, 2019, 08:13:09 PM »
So what have I’ve been  doing ?…..well this arrived just before Christmas  and I just had to play with it , its runs and is on the road.(stood for 25yrs)

(appear date on camera is 10yrs out)

Then Christmas and a stinky cold arrived.

So back to Cb400F  special

I had by now given up any hope of set of alloys for bike and was starting on std hub , double discs laced to flanged ally rims ..mock up with manky wheels.   


Then a set of ARE wheels, which needed work, appeared on ebay …and didn’t win them went for silly money y, but in a jammy git moment a set of CMA wheels appeared on Ebay  for about 1 hr  and were snapped up. In good condition one bearing need replacing and the black paint black came off to relieve 2  shades of gold , one red and finally grey, assume primer. So they are ready for painting but too cold for that.  Piccy shows a lovely home made washer that sits behind the large circlip …..







OK sort  out the forks , discs and calipers …….let nightmare start.

First off the caliper pistons from a second hand set off ebay (CB400N ones) had seized, one popped out with lots of heat and compressed air. The other one despite being soaked required more radical action . Weld a bolt to piston and using a set of spacers pulled it out. One new piston required.

Forks were a set of Cb400N one that I had and knew there was some play on them and I thought new bushes …however these  earlier one don’t have bushes both leg and slider  were worn …..search  ebay again for set of forks. Found set but the description was iffy, even though I phone the guy to check there was no play, these were later type with bushes but one was missing ..sloppy fit or what.   

Discs  CB 400N have 5 holes CB400f have 4 holes ……drill hub ? or  drill disc chose the later

Speedo drive :-  Nearly gave up on this and was moving to using digital speedo and as used  on lavukitangomonty (bit of orange for you)


The problem being the standard 400F speedo drive output is straight while cb400N is angled to get past the disc but is 5 mm too fat to allow the wheel to be central. Simple remove 5 mm from drive unit , reshape the worm drive to match , make up tab to drive the speedo ….simple took most of a morning and still a tight fit.

Right back to the fame , need to go to powder coater…but what colour ? . I would have liked a dark candy red  this was expensive and would be hard to get  a consistent finish  and I had  things like brake disc/calipers  etc which  I wanted in the same colour. So boring flat red but what shade .

Right time warp back  to  1980  Mr Snix  frame is paint in Massy Ferguson red , later 1983 following an incident with some gravel and a car. The new frame was painted Ford velvet red (burgundy) However the old girl was later used every day transport and the frame once again reverted to bright red. …so which colour, your’ll have to wait on that :-)   

Old bike back in 1993 just before behind  sold , have guess how much ? .....bloody muppet I am.



    So  frame is how with the coaters and just for good measure  I stripped out my red 400/4  so the frame could done as well , its cold and not much is being done. There are two set of 400/4 in boxes and plan is work on the red 400/4 .So there will be another gap in installments.

40
CB350/400 / Re: Mystery - Gutless 400 four
« on: December 14, 2018, 08:41:15 PM »
Yes , already done a quick check but needs a good run, then change oil/filter .....started it up today the cam chain rattling a bit more that yesterday .....Just too cold for spannering at present (well its is my garage) ;-)

41
CB350/400 / Re: Mystery - Gutless 400 four
« on: December 13, 2018, 03:40:12 PM »
Can report is cold out there  and bike is running spot on now, pulls in top way better and is smooth as it should be.  :)


 

42
CB350/400 / Re: Mystery - Gutless 400 four
« on: December 12, 2018, 05:06:12 PM »
OK  the bike runs , quick trip the road and seems to pulling fine .....until i could smell petrol ....flooding carb.

It too dark and cold for a proper test run and  Carbs will have to wait till tomorrow , one of them needs a quick tap !

Sounds better already and no smoke on start up .....full run tomorrow.

Question ?   the two dowty washers on the head , why are they there ? why not have just plain copper washers?. Its can't be to stop oil leaks  as other studs are exposed to the elements.

The reason why I had domed head around these washers fit is the metal bit of the washer is too big , so the nut pushes on the outside bit and not the centre where the rubber is = dome. The previous ham fisted muppet that has worked on this engine has over tighten them. Also stripped 2 studs holding the rocker box down. ;-)   

43
CB350/400 / Re: Mystery - Gutless 400 four
« on: December 05, 2018, 08:22:20 PM »
Agree some muppet been there before ..wasn't my mate ...he would given me the engine to work on. Spoke to him (mate) and we  think we have our suspicions it was done by the BMW car dealer were it spend most of it life or handed out for someone to fix up.
But hey who care's now , its should be sorted and back on road in no time ....... then I'll get back to building the special one.


OH Clem2112  might give you a few pointers ,best check you compression first. ...... and don't let muppets lose in garage with spanner.

44
CB350/400 / Re: Mystery - Gutless 400 four
« on: December 05, 2018, 05:14:13 PM »
Ok folks  ..here we go

Checked the bore / piston / ring gap no issues there.
Bore honing is not as course as picture makes out (reflecting alot from the flash) and I've  given them and quick whiz with honer (not a homer) and all OK there. See picture a can lie.

However have found the reason for no power ,importantly the cause and things that don't help matters  :-(

Exhaust valves  from 1 & 2  ( 2  blowing badly)



The head ,and the scratch marks where already there , umm
 

Another issue is the valve seats appear to too wide, spec is  1.5 mm

On on the head we find that where the bonded washer sits the ally been domed / squashed , Both of them.

 

How that's happen I don't know but I will get milled flat and already have some new bonded washers.

No play in valve / guides , One shim missing from under valve spring,all spring well within spec.

So logically thinking, the valve stem seal have given up the ghost - having not been replace at the time of the rebore (although softish the holes are enlarged). This mean the engine is sucking in oil, burning it leaving lots of carbon on the valve etc (there in way!). The seats being too wide allow carbon to form on them  . The valve seat blow then mean no compression , poor mixture
   = NO POWER   :o

Does that  sound right ?  at least its not an expensive fix.


BTW spend most of afternoon removing the remains of the base gasket which had been stuck on with some grey cement the like of which I've not seen before , Why ? .             




 

 


45
CB350/400 / Re: Mystery - Gutless 400 four
« on: December 04, 2018, 06:50:20 PM »
Yes  that's oil here's a  better picture ,  cleaned up ....nothing much to worry about apart the honing marks should be criss cross  pattern



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