Post by: Deano400 on October 24, 2018, 08:33:02 PM
Post by: Athame57 on October 24, 2018, 08:38:01 PM
Post by: Deano400 on October 24, 2018, 08:39:28 PM
Post by: Nurse Julie on October 24, 2018, 10:00:51 PM
Post by: Davelu88 on October 24, 2018, 10:35:01 PM
Post by: Nurse Julie on October 24, 2018, 10:43:27 PM
Post by: Davelu88 on October 24, 2018, 10:52:28 PM
Post by: Nurse Julie on October 24, 2018, 10:56:33 PM
Post by: taysidedragon on October 24, 2018, 11:39:54 PM
Post by: Athame57 on October 25, 2018, 04:11:53 AM
If you look carefully, there are numbers on them. 👍What if I can't see the numbers?
Post by: Laverda Dave on October 25, 2018, 09:48:59 AM
I fitted a new set to my 400/4 bought from DS. I didn't see markings when originally installing them and it was only after struggling to fit the carb bank when I looked again and noticed the faint, raised numbers. I think they were numbered 1 to 4.
Post by: Nurse Julie on October 25, 2018, 10:14:54 AM
[attachimg=1]
Post by: Athame57 on October 25, 2018, 10:36:10 AM
eyes not that good 😀😀😀Surely you don't (or didn't) drive a Cortina?
(Attachment Link)
Post by: Nurse Julie on October 25, 2018, 10:39:53 AM
eyes not that good 😀😀😀Surely you don't (or didn't) drive a Cortina?
(Attachment Link)
😀😀😀😀😀
Post by: Laverda Dave on October 25, 2018, 10:49:19 AM
Post by: Laverda Dave on October 25, 2018, 10:52:22 AM
Post by: Deano400 on October 25, 2018, 10:55:30 AM
Post by: Davelu88 on October 25, 2018, 11:04:45 AM
Post by: Bryanj on October 25, 2018, 11:24:50 AM
Post by: Nurse Julie on October 25, 2018, 02:33:38 PM
[attachimg=1]
Post by: taysidedragon on October 25, 2018, 03:24:57 PM
The routing is shown on p87 of the dealer manual. I guess this keeps the rubber hose away from the engine heat as much as possible.
Post by: Nurse Julie on October 25, 2018, 03:45:26 PM
Julie, that's a good theory, but the engine breather hose goes over the top of the carbs, in the frame clip under the frame tube alongside the wiring harness, down behind the plastic air box and joins the contraption under the air filter.Do you know something, that's bloody amazing and yes, I can see it on page 87. My old 400/4 and this one has it routed between the carbs, I will have to re route it but the angle at the bottom before it goes into the air box bit, would be so acute, I would worry it would clamp itself off.
The routing is shown on p87 of the dealer manual. I guess this keeps the rubber hose away from the engine heat as much as possible.
Edit...does anyone know if the original factory fitted breather pipe had bends shaped in to it?
Post by: paul G on October 25, 2018, 03:51:45 PM
Post by: Nurse Julie on October 25, 2018, 04:09:04 PM
See attached ;)That's what I have been looking at Paul in my manual, what route does yours take?
Post by: paul G on October 25, 2018, 04:20:27 PM
See attached ;)That's what I have been looking at Paul in my manual, what route does yours take?
The one above in the manual :)
Post by: Nurse Julie on October 25, 2018, 04:28:42 PM
Ok, I will re route mine then, I don't like being too different to everyone else 😂😂😂 But, it also F's my theory of why they have flat spots on No's 2 and 3. I don't think it can be just for ease of handling, it just doesn't make sense to me.See attached ;)That's what I have been looking at Paul in my manual, what route does yours take?
The one above in the manual :)
Post by: taysidedragon on October 25, 2018, 04:36:01 PM
Julie, that's a good theory, but the engine breather hose goes over the top of the carbs, in the frame clip under the frame tube alongside the wiring harness, down behind the plastic air box and joins the contraption under the air filter.Do you know something, that's bloody amazing and yes, I can see it on page 87. My old 400/4 and this one has it routed between the carbs, I will have to re route it but the angle at the bottom before it goes into the air box bit, would be so acute, I would worry it would clamp itself off.
The routing is shown on p87 of the dealer manual. I guess this keeps the rubber hose away from the engine heat as much as possible.
Edit...does anyone know if the original factory fitted breather pipe had bends shaped in to it?
Julie, I thought that it would be a tight bend at the bottom as well but it's not too bad. I made the mistake of fitting the breather hose after assembling nearly everything else. Getting hands in there to fit it to the plastic gizmo is a nightmare!
I thought I would have to remove a few items to make space, but I did manage it eventually, with a few skinned knuckles. The chainguard was off which helped. 🔧👍
Post by: Nurse Julie on October 25, 2018, 04:44:09 PM
Luckily, I have very small hands, just right for getting in awkward places ;D ;D My 400/4 is off the road now for the winter so i will add that to the fettle list.Julie, that's a good theory, but the engine breather hose goes over the top of the carbs, in the frame clip under the frame tube alongside the wiring harness, down behind the plastic air box and joins the contraption under the air filter.Do you know something, that's bloody amazing and yes, I can see it on page 87. My old 400/4 and this one has it routed between the carbs, I will have to re route it but the angle at the bottom before it goes into the air box bit, would be so acute, I would worry it would clamp itself off.
The routing is shown on p87 of the dealer manual. I guess this keeps the rubber hose away from the engine heat as much as possible.
Edit...does anyone know if the original factory fitted breather pipe had bends shaped in to it?
Julie, I thought that it would be a tight bend at the bottom as well but it's not too bad. I made the mistake of fitting the breather hose after assembling nearly everything else. Getting hands in there to fit it to the plastic gizmo is a nightmare!
I thought I would have to remove a few items to make space, but I did manage it eventually, with a few skinned knuckles. The chainguard was off which helped. 🔧👍
Post by: taysidedragon on October 25, 2018, 04:55:04 PM
Post by: taysidedragon on October 25, 2018, 04:59:18 PM
So are you saying that they have both numbers on and you just turn them round to show the correct number? eg 1 and 4 are on both sides of the outer insulator
Yep. Took me ages to notice it!
Post by: Nurse Julie on October 25, 2018, 05:09:26 PM
Couple of things.You are correct Ken, I have also just noticed that No 4 is fitted to No.3 cylinder :-[ :-[ :-[
Julie your insulator picture on post 11 clearly shows that the insulator from number 2 cylinder is fitted to number 1 cylinder, sorry I just notice stuff like that.
Im still not understanding how only 2 part numbers covers 4 parts, or am i being thicker than normal ?
Oh, hang on, am i right in thinking then that there are numbers on the underside too then?
OK, got it, No. 3 one side, No 2 the other...No.4 one side, No.1 the other
Soooooo, mine are all on in the wrong places I guess :'( :'( :'( :'( :'( :'(
Post by: Nurse Julie on October 25, 2018, 05:40:42 PM
But, more to the point, we still haven't sussed what the indents are for.
Post by: taysidedragon on October 25, 2018, 05:41:32 PM
Post by: Nurse Julie on October 25, 2018, 05:46:19 PM
Oh no! I'm surprised that you could get the air box on. 😟Everything fits perfectly, or i made everything fit perfectly with no problems at all ;D ;D.
I have done over 1500 miles on her since rebuilding the engine earlier this year and she's running just fine, other than a bit of dirt in an idle jet (also on the fettle list) i wasn't planning to do much else to her this winter, now i'm going to be swapping parts around to their rightful places :'( :'( :'(
Post by: taysidedragon on October 25, 2018, 05:49:48 PM
Oh no! I'm surprised that you could get the air box on. 😟Everything fits perfectly, or i made everything fit perfectly with no problems at all ;D ;D.
I have done over 1500 miles on her since rebuilding the engine earlier this year and she's running just fine, other than a bit of dirt in an idle jet (also on the fettle list) i wasn't planning to do much else to her this winter, now i'm going to be swapping parts around to their rightful places :'( :'( :'(
Ah well. Something to keep you busy through the winter months. ☺
Post by: Davelu88 on October 25, 2018, 08:38:52 PM
Post by: Deano400 on October 25, 2018, 08:46:11 PM
Post by: Nurse Julie on October 25, 2018, 08:46:24 PM
I suspect Julie that the insulators are handed slightly, in that the outside/inside ones may bend very slightly inward, hence why different part numbers and why they are numbered. You may not have noticed any problems getting them engaged with the carbs as they are such a bitch to fit anyway or maybe you did notice but just thought it was normal.I have just been given a lecture on these things and again my assumption was wrong. I thought cylinder 1 would have a rubber on with the No.1 showing uppermost, cyl 2 with a No. 2, cyl 3 with a 3 and cyl 4 with a 4. But, that may not be the case but i wont know until i actually get them in their correct 'pairs' i suppose. Trig did know, because although they are a different design, the CB750 ones are also numbered.
Got to say I'd forgotten about the numbers on them, only really a problem if you remove them for head work etc. Of course Trig will say he knew Julie, he's a man and men don't like to admit they didn't know something even if he really didn't know.
What we need now is someone who has a 400 head off and will fit the insulators incorrectly and then correctly and post pics of them in both cases so we can see if there is an alignment issue.
Post by: Deano400 on October 25, 2018, 08:49:48 PM
No. 1 will have 1 at the top 4 at the bottom.
No. 2 will have 2 at the top 3 at the bottom.
No. 3 will have 3 at the top 2 at the bottom.
No. 4 will have 4 at the top 1 at the bottom.
Post by: Davelu88 on October 25, 2018, 08:57:42 PM
Post by: Deano400 on October 25, 2018, 09:05:18 PM
Post by: Athame57 on October 25, 2018, 09:23:58 PM
Post by: Deano400 on October 26, 2018, 11:18:29 AM
The head inlets are all in line, the insulators are all in line and the carbs are all in line. So the insulators are the same length and not angled.
However measuring the head, the centres between the inlets are different. Between 1 and 2 the centres are approx. 65mm, the same for 3 and 4. The centres between 2 and 3 are approx. 70mm, this is because the cam chain runs between 3 and 4. The centres on the carbs are all the same, approx 67mm.
So the insulators have to be in the right place and the right way up because they have a dogleg. Easy to see on number 2 and 3 when you look for it.
Installed with 1, 2, 3 and 4 at the top (left to right) the carbs line up with the insulators.
Installed incorrectly would definitely make it more difficult to mount the carbs. I guess also would greatly increase the risk of air leakage and poor running.
Typo, the cam chain runs between 2 and 3.
Post by: Deano400 on October 26, 2018, 11:19:32 AM
Post by: Nurse Julie on October 26, 2018, 11:59:09 AM
Post by: Nurse Julie on October 26, 2018, 06:47:04 PM
Post by: Nurse Julie on October 27, 2018, 08:41:02 AM
In that case Julie wash his pants with a load of HIS £20 and £50 notes in them, see if he's willing to let you learn by your mistakes in that case ;D ;D😁😁😁😁😁 I will report back Ken.
Post by: allankelly1 on August 13, 2020, 06:36:45 PM
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Post by: Bryanj on August 13, 2020, 08:10:13 PM