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Messages - vivvov

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1
CB350/400 / Comstar wheels on 400/4
« on: February 08, 2014, 10:43:47 PM »
Hello All

New here. So not that clever at navigating.
Been in the background reading though.
Intro'd myself the other day to the world and his dog..loads of folk from the US, SA, Aus...everywhere.

Then was googling comstar and 400/4.  Came across a dim distant thread..Cafe Racer Project in Oct 2010..rigwit provided some info.. thought message him......blank page and the site says new topic..so tracking back on the co.uk angle...

Situationis :

I've two 400/4s.  Between them I should have enough chrome to stretch to a half respectable stock.
The other..well I've started already. 

Totally dismantled one bike.
Just cut an inch and half off the seat to lower the profile and minimise the back end bump.  Got my eye on a leather chair on ebay for a re upholster.
Plus saw a cafe racer that had comstar wheels (some will hate this I know. Take heart I will keep all necessary bits in a boxes..even the foam I've chopped off..just in case it goes wrong).
This cafe racer had comstar wheels and I've already tracked down a pair off of a 250n, plus forks, back brake (and rear shocks) off of a 400n.

Question is this.  This cafe racer with comstar had only one front disc and I couldn't  clearly see if the caliper was 400/4 or 400n. 
Does anyone know if, by shear luck, 400/4 front calipers/disc  set up marry up to 400n comstar wheel disc bolt holes?
That way I could keep the 400/4 forks and caliper, single front disc set up and not have to start locating400N front calipers, pipes, brake fluid reservoir etc (even though twin discs would be good).

(The racer seemed to be using a 400n brake fluid reservoir so I'm not getting my hopes up).

Hope this makes sense.

Vivvov

2
CB350/400 / Re: Hello All..new to the forum and new to bikes..400 4 Carbs overflowing..
« on: July 25, 2010, 12:51:36 PM »
Thanks K2-K6
googled them but no luck. I'm East London..must be some small shed with all the O Seals ever made, somewhere Stratford CanningTown way..I'm going to drop by a motor factors I know who've always been helpful and see if they have any idea.
Vivvov

3
CB350/400 / Re: Hello All..new to the forum and new to bikes..400 4 Carbs overflowing..
« on: July 24, 2010, 03:44:46 PM »
Hello All

Thought I'd update.
Just polished up float valve seats and needles of 1 and 2 carb...leakage reduced to a couple of drips from number one..good stuff....
Then just taken out no. 3 float valve and Marineboy was right, no 3's o-seal is in bad shape (and I'm guessing the minor drip on no 1 carb is due to o-seal).
So it's a combo of the two.  One I can sort out with polising, the other I can sort out with new
o-seals.

Don't want to come across like a Scourge but anyone got any thoughts on sourcing o-seals as opposed to the whole float valve kit x4.

Vivvov

4
CB350/400 / Re: Hello All..new to the forum and new to bikes..400 4 Carbs overflowing..
« on: July 21, 2010, 09:21:40 PM »
Cheers marineboy..got th weekend coming up to check the 0 seals and polish the valve seats..

5
CB350/400 / Re: Hello All..new to the forum and new to bikes..400 4 Carbs overflowing..
« on: July 18, 2010, 09:39:05 PM »
Going to do all of it. 
The floats seem ok..given them a shake etc already.
Valves and needles.  Reckon you might be right about finger v float pressure. Read somewhere that it's an idea to carefully q tip the valves with chrome polish so as to "re fit" the valves and needles (the ones fitted are all metal..not metal and rubber that DS seem to stock). 
I'll try it all and be back if I'm stumped.
Thanks..
Vivvov

6
CB350/400 / Hello All..new to the forum and new to bikes..400 4 Carbs overflowing..
« on: July 17, 2010, 09:33:57 PM »
Hello Everyone.
I was sitting in a room when a friend of a friend offered up his 400 4 that had been standing for a while (10 years in a garage).  Only ever had a Honda 70 (and that went walk abouts quite quickly..left the night the Fair left town) so I was happy with my 400 4.  Trailered it to work and garaged it some more, did my test, then took the bike to the MOT..limped it to the garage with half of south London sounding it's horn behind me...it passed  but ran terrible..no power on acceleration.  Limped it to a friends drive.  Looked at it a lot.  Then looked at it some more. 
Then took the Carbs out and checked/cleaned the jets and etc..they seemed clean.  Then a friend who used to ride a 400 4 said it wont be the jets..it'll be HT leads or timing or something..but not the carbs. 
Put the Carbs back. Looked at it more. Left it some more.
Last week I put a new battery on it and it started first time..but now petrol flows out of all four carb overflows. I'm sure it didn't used to do that(..guessing the MOT might have highlighted it!).  Guessing some idiot must have messed something up when I (said idiot) took the carbs out first time round.
So I took the carbs out again and put it on a bench.  Checked the floats, checked the float valves and needles. With the float chambers taken off, each float valve and needle cuts of the fuel when finger pressure is applied...and the floats are adjusted to the right cut off depth (22 mm).  No leaks!
However when the leaf spring is added and the float chambers are back on, Turn the fuel on and the chambers fill and all 4 overflows soon start to run nonestop. Plus leave it on and the fuel level raises faster than the overflow can cope with and it comes up through the jets and throttle slide.
I thought maybe I've somehow mixed up the float valves and needles and the wear and tear means that fuel is sneaking in..so I carefully blocked 3 float valves and rotated all 4 float needles in the remaining valve. No luck.  With the chamber back on the one carb (and the other three float valves blocked up), none of the needles did the job of stopping the overflow..the overflow happened with all 4 needles. ???
Now I could just order some new float valves and needles from DS but the fact that the fuel cuts off when the floats are gently pushed up (with the float chambers  off) suggests to a dimbo like me, that valve and needles are not the problem.
Anybody got the idea what's happening here and how to correct it?
(Once it's corrected I can then start on why it's running so poor).
Vivvov

7
New Member Introductions / Hi
« on: July 17, 2010, 07:57:46 PM »
Hello Everyone.
New to all this..but proud owner of a stationary 400 4.. that's presently peeing petrol out of all 4 carb overflows.  Fun fun fun.
Thought I'd say hello here..and then quickly move on to the overflowing carbs section.
Vivvov

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