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Messages - Northy

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16
Project Board / Re: CB400 Four special (Mr Sinx II )
« on: June 24, 2019, 03:37:54 PM »
Ok mudguard arrived  from  D&M engineering and I made a quick a fork brace from stainless plate , as lot cheaper than the £112  for cb400n fork brace on the net . It shouldn't really need it as i've double disc but it will give bit more rigidity to the front end . Also provides more secure location for the brake line clips  ;D

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So thats my front end done , but no strips/decals yet as still not decided on what they should look like but should be pretty easy to do.


So I slapped a spare tank on it for road test and its safe to say this is a horrible colour combination
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The fairing still looks too big for the bike and may be changed at later date , the bike sits very high . I took it for a spin around the block to "test" it ,to find that :-

1) Clutch adjustment way out  (now sorted - has new plates/springs so will need to bed in)
2) Running too rich. Gets to 3.5 k and splutters (later removed some very sooty plugs, so standard jets going back in from 98)
3) Number 1  carb leaking the all new o ring had split , may have caught it when fitting, last spare fitted.
4) Oil leak from rocker box around no 1 area. In other tests the bike was on it centre stand, the leak occurred when run on it side stand . So looks like need to remove the rocker box off to see whats happen in there , at least there's oil up there.
5) Brakes need to bed in 
6) Steering and ride feel fine.

So tank to  still to do , need fuel tap but suspect the yellow tank may be donating one. 

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Side panels  to  add but need some  Cb400 four  logos or something .....going back to 80  I used letraset letters and number , might get some vinyl ones this time  :) 

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So nearly there but not , really disappointed in the rocker box leak it was "glued" into position with a casing compound.





   


 



 

17
Project Board / Re: CB400 Four special (Mr Sinx II )
« on: June 20, 2019, 04:49:51 PM »

The seat alteration was genius!  ;)

Thanks   but I  did about 35  years ago ......trouble was I couldn't remember how had bolted all the bits together. I've over engineered the rubber mounts to much and need to simplify them (at later date or just leave it  ::).

 

18
Project Board / Re: CB400 Four special (Mr Sinx II )
« on: June 19, 2019, 02:19:51 PM »
So enough of my rear !!  whats happening up front

Well having painted the cockpit fairing (old fibreglass and paint is right PITA ) decided to have a brand new mudguard and arriving soon . I finally settled on something that looks oK but not ideal.
 
The view inside

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Yes the bars are bit red , the faring is set up so a set of ace bars can be fitted. 
 
The outside view

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No decals on the fairing as I couldn't decide how it should look so its just plain at present. On full lock loads of clearance between the fairing and tank

All the electrics work , some tiding up required though.

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So just tank to finish , mudguard to fit (need make up fork brace) .......then need check every nut & bolt again.     

I suspect I will used spare tank to give it run up the road this week (oh err that will interesting )  8) ::)
 




 

19
Project Board / Re: CB400 Four special (Mr Sinx II )
« on: June 19, 2019, 02:00:01 PM »
The seat and tail unit proved to right faff , its appears that my 2/4  seat doesn't sit square on the bike (yes messed around with the hing holes etc )   and on checking  my other 400/4  same issue but not as bad. [ Guests cannot view attachments ]

All pissed to one side arrrrggh

Any back to sowing again .....the 2:4 seat laid bare [ Guests cannot view attachments ]

Managed to sow the thing up OK so the  fits first time but brought enough material to have a second attempt.
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And finally my rear end   :o :o :o
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The decals are painted on and the sodding things "leached"??   when I added the lacquer on. There will be logo on the top  of the tail unit when i get around to that

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Last piccy shows how well the exhaust is tucked in . Its not pissed just the camera angle .....its all rubber mounted and moves all over the place though (DOH) 





 

 

20
Project Board / Re: CB400 Four special (Mr Sinx II )
« on: June 04, 2019, 05:15:27 PM »
Already sorted the seat out , ground off bolts and added new ones in the right place. :) ;)
 

21
Project Board / Re: CB400 Four special (Mr Sinx II )
« on: June 04, 2019, 03:37:29 PM »
So with the seat cover off , it revealed its was made in 1981  :)

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After a bit of cutting and adding new foam etc  we get to this stage, with  the sockingette holding the foam in place for the time being
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Next to the rear mudguard. Many years ago i remember  bashing one out of bit of galvanised tin , brazing up brackets to it a covering the thing with filler and black paint, just to make it look better ..In truth it was mess had extra holes in it were I cocked to the measurements etc .

So  Despite measuring and checking there comes a time when you have start bending metal , this was a bit of Stainless steel plate which was on thick size , photo is the not the finished article but you get the idea.
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Then you fit all together and find this ...
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Someone previously had re-welding the seat hinge bolts in the wrong place.

So awaiting some LED lights , seat vinyl/fabric  and thinking of way of attaching all it together. 


22
Project Board / Re: CB400 Four special (Mr Sinx II )
« on: June 04, 2019, 03:16:10 PM »
With the engine running , time to press on with other things . Footpeg and linkages still some tweaking required but not too cluttered

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Time  to look my rear end  ::) :o  and seating ,  would have liked the Cb750  style seat but  gave up  and gone back to the 1980  design of a 2/4  seat, cb900 tail fairing  and set of tractor trailer lights

Well in my draws there was a one of these, a spare from many years ago (PS my Dad was agricultural engineer ,hence the tractor bit and frame in massey ferguson red at one point ) 
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Alas only one , so I will moving to LED on the rear .....modernising it 

However  can't remember if I secured the taillight to seat or the bashed up rear mudguard ...having to start from scratch here then.

So take one Cb900 tail  and cut it up  and mount  to 2:4  seat
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Its don't fit right .....Arh knew this was the case ,so off with the cover and time to adjust the seat. So I've wrecked a Cb900  tail unit  and now a 2:4  seat, needs must 



 




 

23
Project Board / Re: CB400 Four special (Mr Sinx II )
« on: May 29, 2019, 05:56:01 PM »
Well the dreaded "will it go" time had arrived , time to wheel it outside for the first time.

Firstly for some reason the neutral light switch decided not to work. The carbs didn't flood and it turned over (while the clutch was pulled in) ..time to put the plugs back in and hope

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It lives ...phew  !! ;D ;D ;D  couldn't post video up as it was too large

 The carbs are way out but that can be sorted out later, lots of sucking !! no oil leaks , exhaust is a tad loud. Neutral light switch  has since decided to work and its running a bit rich. I have gears too which is a bonus  :)
 
So all good, still lots to sort out

Still can't find a front mudguard in the style I want , think Rd125lc  but wider  :-\   


 

24
Project Board / Re: CB400 Four special (Mr Sinx II )
« on: May 23, 2019, 09:38:07 PM »
Ok the clocks are done .....umm not really can you spot the error.

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They had already been pulled apart so the crimped ring is not a nice as finish as I would like .

Next the wallet took a pounding and new Delkevic system was purchase. They don't list the full system anymore as the bracket for the silencer only fits the F1 models , I wasn't worried as was going to make a stainless one up anyway. So after some discussion managed to purchase a complete one. Its fits easily enough and there are no silly collets to mess about with. Its close fit but it nicely tucked away, very pleased with it.

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Finally the bike is off the wooden bench and can be wheeled around .....ready for a engine start !  ???

Oh hell this is the real scary stuff now  ie  adding battery !  plugs out turn it over to check  oil pressure , do I have spark  ?  adding petrol to the carbs (of course they will flood) ...pressing the button .

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And yes it does lean over a bit as it been jacked up a bit by a inch (my fat a**e will sort that out )
     

 

25
Project Board / Re: CB400 Four special (Mr Sinx II )
« on: May 17, 2019, 06:34:15 PM »
So decide to prep both tanks ......

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However the red tank got put to one side, for another day, as still has imperfections in it.   

In the warm and whilst doing white I started on the cockpit faring , problem being the red paint was reacting with white primer

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So had rub that all the way back ....time consuming task.

BUT least i've got the correct date on my camera now ;-) ... for this picture away

Some  other bits done

Sorted out the mounting for fairing and a new 7  inch headlight
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Finally got my mate to turn down the wheel spacer to 19 mm  for the rear wheel spindle and fit wheel, chain and stuff to the rear end.

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Might get around putting oil in engine and turning it over ....but that means sorting out the wiring out and clocks  opps

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Next fun headache is the seat. I was after a giuliari style sloped seat like on the 750,but none for 400/4 and the chinese specials are too short. So back to the drawing board and a 2/4 seat as originally fitted to Mr Snix has been purchased and will be modified 

Sowing machine out !!

 



 









 

26
Project Board / Re: CB400 Four special (Mr Sinx II )
« on: May 17, 2019, 06:14:57 PM »
Ok folks back again  and things are going slowly  due to a number of factors (don't want to bore you will that)

So this a tale of two tanks

The red one got washed with acid inside this time and yet more 2 pin holes appear ....chemical metal call into play and time to seal the tank up. I normally use POR 15  but everywhere seem to be out of stock on the small tins. So decided to go for tapox  [ Guests cannot view attachments ]

Well its crap , firstly the temperature needs to really high to ensure the solvent evaporates and instructions say to pump air into the tank for 5 hours !  to ensure the solvent doesn't condense inside the tank and wash away the sealant. Also you use only use a 1/3  of the tin. Well even in green house it took for ever to dry, 2 days. I pumped air into via the hole for the petrol tap and ok that side but the other side had condensation even after 1 hour and washed the sealant away (bit like red oxide) Added more stuff to cover the washed away bit but still same effect . Even the left over stuff in the tin took a week to go off (yes it was all mixed properly)....Rant rant 

So about given up on the red tank ......move to blue tank (thanks Peter)
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Once the paint was removed even more rusty stuff under it  but it didn't leak and even once the inside was cleaned out , no leaks , phew
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Problem was loads of rust pin prick holes  once the rust was removed  and what I'd call micro  dents

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27
Project Board / Re: CB400 Four special (Mr Sinx II )
« on: April 23, 2019, 10:16:08 AM »
There's a set of taper roller bearings in there , same as I had in 1980's ........all pee removed   ;D

Anyone got an old seat base  ?  making my own seat as can't get what I want.
 




28
Project Board / Re: CB400 Four special (Mr Sinx II )
« on: April 22, 2019, 08:25:36 PM »
Next up Tank .....this dented thing arrived and was suppose to hold petrol , inside looked Ok and top although dented wasn't bad

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However the horrors where  underneath

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Umm bad rust but nothing I couldn't deal with. I could sand blast it but that can be bit too vicious
Then I had thought .........it soon passed  ;)


We see a lot of posts "How do I de-rust my petrol tank"  and whole lot of answers , but it very hard to photo the inside of your tank So I'll show you what I do by doing the outside.

 I attack it with sprint of salts , 500ml  for £3.50 @ homebase . The odd thing is this stuff doesn't work on grease or paint very well,  so need de-grease then strip off any of the paint.
Then next problem is the local homebase is shut , ie mean closed down ... so brick acid can be used (Note I live Nr Dover, the only town which doesn't a Mcdonalds in high street ,shut 1 yr ago)

Anyway back to tanks .....I was using some old stuff I had, hence the rather green brown mess (normally clear) then there's  the problem in getting the stuff to stay in contact with metal not an issue inside a tank.  I was using couple bits of rag and making sure there soaked now and again . Its job you leave and do something else while it pickling away [ Guests cannot view attachments ]

The  final result took longer than normal , could quicken it up by using fresh acid and scrubbing it with small wire brush. However remember this stuff is 36% hydrochloric acid , hence why the green colour, the brown colour is old rust and the fumes are nasty (outdoor jobbie) [ Guests cannot view attachments ]

The stuff is washed off with a caustic soda solution then lots of water, dried and given a coat of etch primer ......however spot the holes at the rear of the tank ......B*****R  !

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Good news is managed to mig weld the holes , phew !!  covered the area with chemical metal just case and no leaks . I will be sealing the tank as well.

Now to work on the top side of the tank .....   

 



     



29
Project Board / Re: CB400 Four special (Mr Sinx II )
« on: April 22, 2019, 07:52:28 PM »
This is  the fairing I've got to work with ....will be adding a 7 inch headlight  as well . The whole bike will be taller and this may "too"  large a fairing might just work, only one way to fine out .Will be using the existing headlight brackets [ Guests cannot view attachments ]

Next "problem" was this fine looking box section s/arm arrived from a forumite [ Guests cannot view attachments ]

Question was spray it up in matching colours (red) or fit as is ..........fit as it !  its too good to paint and if it doesn't work not hard to spray it up

Having a right PITA time with the front brakes , bleeding them.  To start with the face on master cylinder was pitted ,so that was smoothed out,as it leaked. The long double banjo bolt is not long enough , so feel uneasy tightening it up hard. Tried everything but there still feels like air in there. I've got a hard lever but it should do it sooner than it does if you know what I mean. [ Guests cannot view attachments ]

Of course manage to fit the lines in the wrong order so cross further down ....but there staying like that  for while.   


30
Project Board / Re: CB400 Four special (Mr Sinx II )
« on: April 15, 2019, 08:47:29 PM »
Have you WhatsApp or an email
I can send an old pic over of it fitted

PM sent

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