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Topics - AndyD

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46
CB750 / Setup manual
« on: June 09, 2020, 07:45:22 PM »
Hi,
Been sorting through a pile of manuals etc. in the garage and scanned a few setup manuals in in case they are of any interest to anyone.
One is a CB750 - doesn't say what type but I think it's a SOHC early one with spoke wheels and 4-4 exhaust.
If it's of interest maybe someone can remind me how to upload / send it somewhere to add to the Cave.
Cheers,
Andy

47
CB350/400 / Petrol tank
« on: June 08, 2020, 10:48:56 AM »
Hi,
Are the 550 and 400 petrol tanks interchangeable?

Cheers
Andy

48
CB350/400 / Had enough
« on: May 31, 2020, 02:47:40 PM »
Hi all,
It's been great fun working on the 400 but decided today that she's not going to get any more money or time spent on her as she clearly doesn't want to play along!
Bought her as a basket case with some (odd) work already done and wasn't really sure if she was original / complete / sound enough to warrant investing time and effort but thought I'd give it a go.
The plan was to get her up and running and assembled without spending too much and this has gone reasonably to plan.
If she ran and sounded good I thought I'd then treat her to the pretty bits and a second round of restoration including chrome, paint, etc. etc.
Enjoyed rebuilding the engine and she runs up well enough despite being only 'roughly' tuned on the bench but the final straw has to be the carbs - after many checks, tweaks and resets and new DS parts they still leak like a holed bucket as soon as the fuel is turned on and I don't have the heart to do much more on them.
Just deciding whether it's best to sell together or break for parts - probably more value in parts but always a shame and I guess takes a lot of time to clear the whole lot. Any views on this from experience?
The best thing about doing this one has been this forum - really nice, helpful people who clearly love the bikes they own / work on.
Cheers,
Andy

49
CB350/400 / Petrol Tap
« on: May 24, 2020, 11:59:06 AM »
As with every other part on this poor old bike the fuel tap has been abused and bodged - O rings etc. missing, all joints and threads 'sealed' with tape / goo.
Thought it might be easier to get a cheap tap on ebay instead of trying to resurrect the old one but they all show 16mm in the description while the thread on the tank is more like 19 / 20mm.
Does the 16mm refer to inside diameter or something or do i need to keep looking for a tap with correct larger thread?
Cheers,
Andy

50
CB350/400 / 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

51
CB350/400 / Exhaust
« on: May 10, 2020, 09:37:04 AM »
Morning all,
Well, the 400 fired up (much to my surprise) pretty well first try so bit of a result there - even ran quite smoothly considering only basic setting up done so far.
Knackered old battery but booster I bought a couple of years ago works amazingly well to help it on starter etc.
Lots of cable ties and bodges to hold everything together where I had assembled the bike to see if she ran OK before spending any more money on prettier bits - she's had a really hard life so every single part of the bike has been bodged, damaged, worn out or replaced with non-standard bits.
As she now looks more promising I'll slowly strip back bits to tidy up again - hopefully the engine and frame can stay untouched during this so it's easier to play with.
One thing I'm struggling with is the silencer. The bike came with the original downpipes and collector all in pretty good nick but no silencer. For the trial run I bodged a rusty old silencer off one of the CJ's with tin foil, clamps and cable ties just to save annoying every neighbour in the area.
I really want an original look silencer but it seems noone has these in stock any more - does anyone know if these are being re-made anywhere or is it now just a choice between finding one on eBay or going for a universal style silencer?
Cheers,
Andy

52
CB350/400 / Leaky carbs
« on: April 28, 2020, 05:25:52 PM »
Hi all,
I know it's a common issue the carbs leaking through the overflow and sure enough the poor old gal suffers this indignity as well after refurbing the carbs.
Everything cleaned and reassembled fine with new O rings etc.
Spent a few happy hours setting the float levels having read many topics on here - ended up using the method with carbs on side and very slightest pressure on the float pin.
First time on test she dribbled happily so took apart again and re-cleaned the float pins etc. and checked float levels again.
Put back on test and again 2 carbs started dripping straight away - 1 quite a constant flow, the other a slower drip.
I'm guessing this means the float pins / valve may need replacing so i wondered what opinions were on different replacements available (trying to keep spend down so cheaper the better!).
Any views welcome
Cheers,
Andy

53
CB350/400 / Two questions
« on: April 25, 2020, 07:05:16 AM »
Morning all
Two hopefully straightforward questions...
What is the length of the 4 carb overflow hoses?
There seem to be 2 different carb manifold rubbers but mine were in a box so I don’t know which goes where or the identifying difference etc - any clues?
Cheers
Andy

54
CB350/400 / Front sprocket
« on: April 09, 2020, 07:08:18 PM »
Hi all,
When I took off the front sprocket on the 400 there were 2 or 3 broken very thin washers in the general greasy gunk.
I can't see any reference to these on the parts diagrams so wondered if they were supposed to be there or something the previous owner added for some reason?
Putting the sprocket on with the retainer the sprocket is very wobbly - is that normal on these bikes?

Cheers,
Andy

55
CB350/400 / Oil Pipe / hoses
« on: April 06, 2020, 11:25:24 AM »
Morning all,
Another question if that's OK...
The short pipe by the oil filter is a bodged bit of crumbling hose on mine and seems to be NLA as replacement - part 69 on attache image.
Is this just 'any old' bit of fuel / oil hose or does it need to be anything more?
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Also replacing the various other fuel / vent hoses and assume that the description in parts books show the internal id and overall length. od being unimportant - is that correct?

Cheers,
Andy

56
CB350/400 / Head Bearings
« on: April 01, 2020, 07:34:19 AM »
Just about winning a battle to get head bearings fitted on the 400 and am a bit baffled that it is so awkward.
Went for the All Balls kit which seems to be the most common offering and I have read lots of threads about problems of reduced thread for adjuster nut so tried to proceed as carefully as possible.
Spent ages again Googling on this before starting but there seems to be no definitive answer anywhere regarding the spacers etc.
In the end I found that only the thin spacer on the lower bearing could be used otherwise the top thread is virtually non-existent.
Even with this, it is only just enough and if the dust cover and washer are both fitted the amount of thread is very small.
One thread on the US site showed flattening the raised teeth on the adjuster screw and omitting the spacer (and I think dust seal) to get a bit more thread.
I'm going to play some more with this still but it just seems crazy that a common replacement part is so tricky and maybe dangerous as I guess there needs to be at least a reasonable thread for the adjuster screw to fix properly.
Any thoughts?
Cheers,
Andy

57
CB350/400 / Two questions..
« on: March 09, 2020, 06:09:56 PM »
Finally reassembling the 400 engine and have two questions I'm hoping for a bot of help...

One for Nurse Julie - you very kindly sent two O rings for the outer dowels on the crankcase to sit into the base gasket. I enlarged the holes to suit these but when lowering the barrels over the studs, the barrels 'rock' on these and before I tighten anything down I wanted to make sure that's OK and that they will just squash down without problem?

Secondly with the large O rings around the bores, these don't seem to want to stay in the grooves but tend to roll down the bore a bit.
Does this cause any issue when clamping the barrels down - i.e. do they just slide into the right place as the barrels are fitted or is there a risk of them getting snagged and out of position / shape?

Cheers,
Andy

58
CB350/400 / Carb top gasket
« on: March 03, 2020, 05:23:41 PM »
Hi all,
Is there a good source for the carb top gaskets for the 400/4.
I've got everything else from Gerben so just need these to complete the bits needed.
Cheers,
Andy

59
CB350/400 / Carb top gasket
« on: March 03, 2020, 05:22:53 PM »
Hi all,
Is there a good source for the carb top gaskets for the 400/4.
I've got everything else from Gerben so just need these to complete the bits needed.
Cheers,
Andy

60
CB350/400 / Mystery bit
« on: February 25, 2020, 02:48:53 PM »
Hi all,
Cracking on with build of the 400 engine and sorting through the various boxes and bags it came in I found this little 'cap' of some kind.
No idea what it is - may well not be from the engine, just some detritus the previous owner threw in for good measure but I just wanted to make sure it's not some critical part that's dropped off somewhere in the engine.
Any ideas??
Cheers,
Andy
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