Author Topic: CB400 Four special (Mr Sinx II )  (Read 1890 times)

Offline Northy

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Re: CB400 Four special (Mr Sinx II )
« Reply #45 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  ::).

 
How many is too many bikes ..... when you have no space left.

Offline Northy

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Re: CB400 Four special (Mr Sinx II )
« Reply #46 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.





   


 



 
How many is too many bikes ..... when you have no space left.

Offline Northy

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Re: CB400 Four special (Mr Sinx II )
« Reply #47 on: June 24, 2019, 03:43:48 PM »
OH the  funny gaps in the tank paint work , luckily I had something to cover them up with  ::) ;)

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Needs lacquering  and going off etc ......thats another  week of spray ,spray,waiting, rub down, spray , more spray , more rubbing and waiting.


 



How many is too many bikes ..... when you have no space left.

Offline mattsz

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Re: CB400 Four special (Mr Sinx II )
« Reply #48 on: June 24, 2019, 03:45:25 PM »
OH the  funny gaps in the tank paint work , luckily I had something to cover them up with  ::) ;)

We knew you had something in mind there!  ;)

Offline taysidedragon

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Re: CB400 Four special (Mr Sinx II )
« Reply #49 on: June 24, 2019, 07:27:25 PM »
I like the colour scheme. Looking good.
2010 Street TripleR
1977 CB400F

Offline Northy

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Re: CB400 Four special (Mr Sinx II )
« Reply #50 on: July 02, 2019, 05:19:30 PM »
Well  from  pile of bits , frame , spare engine and wallet shrinkage bits .......Mr Snix  (mark II) . Still things to sort out.

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Running smoother on standard jets, with proper coloured plug which is odd as I'm running pod filter (albeit oiled) Pulls cleanly up to 5k .....running it in , honest !  ::)
Does "smell " warm, combination of tight engine, engine paint going off and warm weather
Brake still feel very wooden.
Front end is too soft
No oil leaks ....had caught the rocker box gasket


There are number things which have arisen since adding all the bits together and riding it.

The 2:4 seat is slightly narrower at the front so some bits on the tank I thought would be covered up ...aren't.
The cockpit fairing is mounted to the headlight bracket which is rubber mount so it wobbles. 
The Speedo is a pattern Cb400n part and is too long (brake line also tad too long as well) further highlighted by soft front end
The massive number plate has to go (looks like a air brake )

Ohh don't just run the engine breather tube into a plastic bottle inside the unused air box , you get steam rising from under the seat.

So is it finished ...nah never , the original one took a number of years to perfect .Then it got used,abused and end up used a commuter.

This is an attempt to go back in time , ie what we did the 70/80's with bikes, we all modified them. I could have put all the modern stuff on it but I might as well got a 1998 honda CB400R (supersport) and tarted it up but where's the fun in that  :-) (ohh that  might be a interesting project  :o :o ;) )_ 

Needs some logos, decals, a clean to remove grubby mit marks & dust, tank needs rubbing down and need to put some more wadding in the exhaust . Its too loud for me so at 6k its going to howl a lot.   

 

 

 
 

     
How many is too many bikes ..... when you have no space left.

Offline SteveD CB500K0

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Re: CB400 Four special (Mr Sinx II )
« Reply #51 on: July 02, 2019, 07:17:38 PM »
You are right about ”this is what we all did to our bikes”. We couldn’t wait to rip them apart (see avatar)

That does look good though.


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2015 Tiger 800 XRT
1971 CB500K0

Offline Northy

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Re: CB400 Four special (Mr Sinx II )
« Reply #52 on: July 07, 2019, 05:23:15 PM »
Thanks for the comments and I think this will be work in progress .

Still very aware it runs very hot .... so just given it some short runs in the cooler parts of the day. I was so paranoid had to check it oil was getting to the top end by removing a tappet cover ....its was and duly ran oil all over the engine. If there was an issue it would have gone bang or screeched to a halt by now. Thinking of putting 20/50w oil in there,currently using 10/40 but it semi syn and well runny when warm.

Plugs are the right colour and the thing is slowly getting better ie not getting so hot so quick. Engine pulls really well. Everyone loves the pipe but still too noisy for me   

Got puncture in rear 1/2 mile from home today ..nice new nail   ::)   rather put a hold on the running in as only had front tubes in my stash.
Also one side panel cracked at the top , was secondhand to start with.   

Modified the rear wheel spindle , fitted a longer one due to dresda box section swing arm being fatter , still tad to long 

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Then made simple stop for the rear brake lever, its just a bit ally with offset holes so can used as a cam.

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Next up the rear under tray will chopped back , doesn't need to be that big as its not carrying any weight and paint outside black.

Brakes slowing getting there.

Its making me smile  :D  especially when a guy you don't recognise, says "Hi, Northy I remember being chased by that bike back in 80's" not seen him since the early 80's but its that bike they remember.

Or maybe my 40 yrs old oxblood red leather jacket, which has been adjusted to fit again (may put few pounds on over the years)


 
How many is too many bikes ..... when you have no space left.

Offline pistonbroke 66

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Re: CB400 Four special (Mr Sinx II )
« Reply #53 on: July 11, 2019, 11:13:35 AM »
Take a bow that man, some cracking work there!

Offline paul G

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Re: CB400 Four special (Mr Sinx II )
« Reply #54 on: July 11, 2019, 12:01:45 PM »
Great stuff keep up the good work.
Honda CB400 4
Honda CB550 K3
Honda CB750 UK K1 restoration
Kawasaki Z650 C2
Kawasaki Z650 cafe racer (bitsa) ongoing