Author Topic: Airbox  (Read 135 times)

Offline AndyD

  • SOHC Associate
  • Posts: 89
    • View Profile
Airbox
« on: May 17, 2020, 07:29:16 PM »
Softened the rubbers and 'forced' the airbox and carbs onto the bike to check she runs but not happy how things fitted so looking to sort this.
The rubbers to the head seem fine so I think I'll leave these (wintergreen softened them really well and have new O rings ).

The airbox and rubbers to the carbs are a different story!
Rubbers softened up OK but are a bit beaten up so will be replaced.
Fitting the carbs the rubbers just wouldn't go over the carb stubs fully so for testing fixed these 'just' onto the stubs.
Even with the rubbers short on the stubs (middle two especially) the joint to the filter box just seems too short - if I pull it back the carb rubbers don't reach.
Any idea if there were different airboxes / rubbers which could have been mixed up or is this maybe that the airbox is misshaped.
DSS have the airbox and rubbers in stock but I don't want to buy one if the same problem is likely.

Cheers,
Andy

Offline Nurse Julie

  • 1973 CB750 UK K2.1977 CB550/4 Mongrel Brat. 1978 CB400/4.
  • SOHC Jedi
  • Posts: 5421
    • View Profile
Re: Airbox
« Reply #1 on: May 17, 2020, 07:56:23 PM »
The air boxes tend to sink, especially in the middle, harden up and stay that way, that's why your middle 2 rubbers seem too short.
Im a Nurse, trust me, this won't hurt.....much !!!

LINK TO MY CB400/4 ENGINE STRIP / ASSESSMENT AND REBUILD...NOW COMPLETE
http://www.sohc.co.uk/index.php/topic,14049.msg112691/topicseen.html#new

Offline Oggie400F

  • SOHC Member
  • Posts: 150
    • View Profile
Re: Airbox
« Reply #2 on: May 17, 2020, 09:24:10 PM »
400fourbits has a couple of air boxes on his website if that is of help.
I'm a Radiographer............I can see right through you!!

1999 VFR800 fix in Pearl Prism Black
1978 CB750F1 in Candy Presto Red
1976 CB550F Supersport Brat Bike in Black
1976 CB400F in Varnish Blue - project bike in many bits.

Offline AndyD

  • SOHC Associate
  • Posts: 89
    • View Profile
Re: Airbox
« Reply #3 on: May 21, 2020, 03:21:32 PM »
Thanks,
I've got a new airbox and rubbers from DSS as I think the old one was indeed a bit deformed and knackered.
Preparing to re-fit the carbs and have a few questions to make sure I don't get anything wrong...
Inside the airbox, I wanted to check which way round the rubber / sleeve connector bits fit - attached photo shows the bits I mean - the oval rubber and galvanised 'sleeve'.
[ Guests cannot view attachments ]
Also, I noticed in the Haynes manual it says to remove this galv sleeve, then the airbox and finally the carbs themselves in the dismantling section - is that what people do and if so is fitting a reversal of this, i.e. fit the carbs to the engine stubs, then squeeze the airbox in and connect up?
Cheers,
Andy

 

SimplePortal 2.3.5 © 2008-2012, SimplePortal