Author Topic: The battle to get carbs synced  (Read 2058 times)

Offline deltarider

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Re: The battle to get carbs synced
« Reply #15 on: October 28, 2017, 02:14:46 PM »

Offline K2-K6

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Re: The battle to get carbs synced
« Reply #16 on: October 28, 2017, 04:09:19 PM »
That's a useful document delta, well worth a reference on here.

I know we can go on a bit here about apparently trivial stuff but often it shakes out some small piece of information that is not common knowledge, and helps move things forward in understanding some of these bikes.

Sure,  I'm guilty of perhaps elaborating stuff that people may not really feel interested in but I think thing's should be posted and constructively examined in looking at problems. Ultimately there's alot to learn and some have not had the benefit of working on these long term so most discussions are valid.

Be interesting to see how the setup on this one progresses,  having any additional number of them running well is what we're interested in.

Offline Seabeowner

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Re: The battle to get carbs synced
« Reply #17 on: October 28, 2017, 05:27:26 PM »
Andy, the Delkevic pipes I've seen have spring retaining the headers to the collector. Motad headers just push into the combined collector/silencer. (+1off nut/bolt)

+ interesting carb document, from first principles.
But delta it refers to the air screw as an "air bleed screw for adjusting idle mixture" so IMS covers it.
Peace.

Hope all goes well with the start up.
Phil
1971  CB500K0  Candy Jade Green or Candy Gold
1973  CB500K1  Candy Ruby Red
1975  CB550F1   Shiny Orange
1978  CB550K     Excel Black

Offline deltarider

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Re: The battle to get carbs synced
« Reply #18 on: October 28, 2017, 06:04:21 PM »
Quote
But delta it refers to the air screw as an "air bleed screw for adjusting idle mixture" so IMS covers it.
No doubt Honda self is a bit strange in giving names to certain parts, but over the years on the international site IMS has become synonemous with the pilot screw that's situated engine side and that operates opposite from the airscrew. Turning clockwise an IMS means leaning out, where turning clockwise an airscrew means enriching. As you read on the international site quite recently it has lead to a lot of confusion again. It's far from me to be school mastery, but I hate to correct numerous posts later on where I could have avoided it by doing it right at the root. No harm intended. Peace in our time.  ;)

Offline hairygit

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Re: The battle to get carbs synced
« Reply #19 on: October 28, 2017, 07:55:05 PM »
Peace in our time??? I recall seeing newsreel of a British politician waving a bit of paper talking about "Peace in our time" and weeks later the world was plunged into war!

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Offline K2-K6

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Re: The battle to get carbs synced
« Reply #20 on: October 28, 2017, 08:16:03 PM »
For our most recent problems we could blame everything on #@%$,  but now the happy catalans have given us another get out clause.

There'll always be something along to liven things up a bit. :)

Offline deltarider

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Re: The battle to get carbs synced
« Reply #21 on: October 28, 2017, 08:36:52 PM »
Interesting times. First thing in the morning is a coffee and watch BBC Breakfast.

Offline AndyH

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Re: The battle to get carbs synced
« Reply #22 on: October 29, 2017, 08:34:27 AM »
Fired the bike up a couple of hours ago.  With ambient temp around 70°F some choke was needed, but after a minute or two, idle at 1000rpm was achieved without choke.  Carbs will be vacuum synced tomorrow to get them spot on, but they're pretty close.

We're preparing for a vacation down to the SE coast of West Aus. for a few weeks, leaving next Thursday, so playing with the bike is interspersed with trip prep.  :)
Andy

1971 CB750K1
1972 CB500 Four K1 (SOLD)
1978 Suzuki GS750E
Previously....
1967 Honda Sports 90
1971 Yamaha CT2 175
1973 Yamaha RD250
1975 Kawasaki KX125
1979 Yamaha XT250T
BMW R65
BMW R80
BMW R100LT

Offline K2-K6

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Re: The battle to get carbs synced
« Reply #23 on: October 29, 2017, 08:49:31 AM »
Sounds like you're on your way with it,  it's great when you can get them sorted and get out for a run.

Offline AndyH

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Re: The battle to get carbs synced
« Reply #24 on: October 29, 2017, 09:32:35 AM »
Sounds like you're on your way with it,  it's great when you can get them sorted and get out for a run.

Your not wrong mate!  When we get back from our "Southern Sojourn" the weather should be just right for a few good rides.
There's a club here in Perth (Vintage and Classic M/C Club) which does weekly rides so I'll be hooking up with them!  8)
Andy

1971 CB750K1
1972 CB500 Four K1 (SOLD)
1978 Suzuki GS750E
Previously....
1967 Honda Sports 90
1971 Yamaha CT2 175
1973 Yamaha RD250
1975 Kawasaki KX125
1979 Yamaha XT250T
BMW R65
BMW R80
BMW R100LT

Offline Johnwebley

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Re: The battle to get carbs synced
« Reply #25 on: October 29, 2017, 10:21:00 AM »
Sounds like you're on your way with it,  it's great when you can get them sorted and get out for a run.

Your not wrong mate!  When we get back from our "Southern Sojourn" the weather should be just right for a few good rides.
There's a club here in Perth (Vintage and Classic M/C Club) which does weekly rides so I'll be hooking up with them!  8)

 its your summer,our biker night rides finished earlier this month,
go and enjoy,(lucky s*d !! )

 and post lots of pictures
lifelong motorcycle rider,and fan

Offline AndyH

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Re: The battle to get carbs synced
« Reply #26 on: October 29, 2017, 10:29:29 AM »
Hehe, will do John! 8) ;D
Andy

1971 CB750K1
1972 CB500 Four K1 (SOLD)
1978 Suzuki GS750E
Previously....
1967 Honda Sports 90
1971 Yamaha CT2 175
1973 Yamaha RD250
1975 Kawasaki KX125
1979 Yamaha XT250T
BMW R65
BMW R80
BMW R100LT

Offline sgd37

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Re: The battle to get carbs synced
« Reply #27 on: October 30, 2017, 12:00:32 AM »
Quote
Thanks.
Don't mention it.
https://www.4shared.com/office/jC4Zzkqhce/Honda_Motorcycle_Carburetor_In.html

Hi,

I'm interested in getting the right airscrew balance for my bike as well, but can't seem to be able to download the document.

Does anyone have another source? or maybe they could send me their version.

Cheers

Offline deltarider

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Re: The battle to get carbs synced
« Reply #28 on: October 30, 2017, 06:53:30 AM »
http://cincinnaticaferacer.com/wp-content/Manuals/HondaCarbManual1975.pdf Download takes some time (31 MB). Although there's more interesting stuff in the 34 pages, the chapters AIR-BLEEDS and IDLE AND LOW SPEED SYSTEM matter most. Unless your interested, you can leave the pages that deal with CV carbs aside.
« Last Edit: October 30, 2017, 07:28:23 AM by deltarider »

Offline sgd37

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Re: The battle to get carbs synced
« Reply #29 on: October 30, 2017, 05:54:27 PM »
Whilst good for general knowledge, I couldn't find an actual procedure to set the correct idle mixture.

Am I missing something?

Cheers

 

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