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Author Topic: What do you use for vaccume when adjusting carb gauge tool  (Read 6099 times)

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Offline rotortiller

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Re: What do you use for vaccume when adjusting carb gauge tool
« Reply #50 on: August 18, 2018, 05:44:31 AM »
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that sucks.

And it does so very well!  ;D
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Offline Dos

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Re: What do you use for vaccume when adjusting carb gauge tool
« Reply #51 on: August 18, 2018, 10:15:52 PM »
Well #$%*.. I didn’t know this would blow up haha.. so am I back up square one!?

I have improperly synced my gauges!?

Or I have synced with one cylinder into 4 gauges!?
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Offline Dos

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Re: What do you use for vaccume when adjusting carb gauge tool
« Reply #52 on: August 19, 2018, 08:09:31 PM »
There seems to be a debate between whether it is okay to sync all four gauges to one cylinder.. can I get a confirmation that 1 cylinder to four gauges is OKAY? Or Wrong?
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Offline Erny

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Re: What do you use for vaccume when adjusting carb gauge tool
« Reply #53 on: August 19, 2018, 10:29:15 PM »
I believe it does not really matters to which source you calibrate your gauges.
Important is they are calibrated (= showing equal value) on the same source.

So,in practice, I would choose 1 cylincer and attached one by one gauge onto it, recording value it shows. Shall be the same ideally.
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Offline 70CB750

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Re: What do you use for vaccume when adjusting carb gauge tool
« Reply #54 on: August 20, 2018, 04:15:34 AM »
Quote from: rotortiller on August 17, 2018, 03:34:43 PM
Cheap and simple works every time.




Haha, I suggested syringe in the reply #1.  Glad to see it actually works.
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Offline rotortiller

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Re: What do you use for vaccume when adjusting carb gauge tool
« Reply #55 on: August 20, 2018, 05:16:37 AM »
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Haha, I suggested syringe in the reply #1.  Glad to see it actually works.

I even moved the gauge position around on the connections to make sure they still maintained equality. Also altered damper settings during cal, basically extra effort against my better judgement after reading a bunch of posting BS. LOL ;)
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Offline slikwilli420

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Re: What do you use for vaccume when adjusting carb gauge tool
« Reply #56 on: August 20, 2018, 06:59:10 AM »
10 days. Is this thing f*cking riding yet? Gotta be the longest discussion on syncing your sync gauges on earth.
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Offline 1952paul0

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Re: What do you use for vaccume when adjusting carb gauge tool
« Reply #57 on: August 20, 2018, 07:08:43 AM »
Quote from: slikwilli420 on August 20, 2018, 06:59:10 AM
10 days. Is this thing f*cking riding yet? Gotta be the longest discussion on syncing your sync gauges on earth.
yep they do make hard work of it.
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Offline Dos

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Re: What do you use for vaccume when adjusting carb gauge tool
« Reply #58 on: August 20, 2018, 03:46:28 PM »
OK I did one gauge at a time and for the record It did not make any difference however the fourth gauge was off by one tick that is all
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Offline Dos

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Re: What do you use for vaccume when adjusting carb gauge tool
« Reply #59 on: August 20, 2018, 05:39:37 PM »
Alright I have also synced my gauges.. at idle they are all at 8.. mid throttle they are also good however when I go FOT cylinder 3 or 4 will sometimes go out of wack
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Offline slikwilli420

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Re: What do you use for vaccume when adjusting carb gauge tool
« Reply #60 on: August 20, 2018, 05:50:06 PM »
Quote from: Dos on August 20, 2018, 05:39:37 PM
Alright I have also synced my gauges.. at idle they are all at 8.. mid throttle they are also good however when I go FOT cylinder 3 or 4 will sometimes go out of wack

Please stop inventing procedure for tuning your carbs. Sync at idle then stop. There is no syncing carbs at other throttle positions. Please for the love of God go ride.
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All you gotta do is do what you gotta do.

Vintage Speed Parts Mashup: http://forums.sohc4.net/index.php?topic=133638.0
Rickman CR Parts Kit Refresh: http://forums.sohc4.net/index.php/topic,154837.0.html
AHRMA CB750 Racer: http://forums.sohc4.net/index.php/topic,158461.0.html
AHRMA Superbike Heavyweight Racer: http://forums.sohc4.net/index.php/topic,173120.0.html
'76F CB750 Patina Redemption: http://forums.sohc4.net/index.php/topic,174871.0.html

Offline Jetsurly

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Re: What do you use for vaccume when adjusting carb gauge tool
« Reply #61 on: August 25, 2018, 11:32:43 AM »
Sorry in advance for beating a dead horse here but could unsynced carbs be the reason my bike doesn’t idle and just dies at startup? If I rev while starting it’s fine but when I release the handle dies. Thoughts?
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Offline Erny

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Re: What do you use for vaccume when adjusting carb gauge tool
« Reply #62 on: August 25, 2018, 02:45:03 PM »
I'm not expert, but I think sync only contribues to idle (its regular run). The fact that your bike does not idle should not be due just to sync.
Did you try to increase idle RPM by main idle screw?
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Offline Jetsurly

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Re: What do you use for vaccume when adjusting carb gauge tool
« Reply #63 on: August 26, 2018, 02:35:18 PM »
Quote from: Erny on August 25, 2018, 02:45:03 PM
I'm not expert, but I think sync only contribues to idle (its regular run). The fact that your bike does not idle should not be due just to sync.
Did you try to increase idle RPM by main idle screw?

Not yet. I’m on a work travel spree right now but as soon as I get home I’m gonna dedicate some time to this issue, as it’s my biggest one right now :(
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