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Mechanics 101 Can't get it to run right? Find a trick to add HP?
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Old 12-28-2017, 12:51 PM   #1
Doc_speeder
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Default Idea for improving DIY carb sync tool?

So I am going to build a DIY carb sync tool. The type with the 4 liquid bottles and hoses and such...you've all seen 'em.

I've never synced carbs before as this is my first multi cylinder carbed bike, but I see an issue with the typical diy manometers.

The correct method is to sync the "base pair" (off the top of my head I can't remember if that's 3-4 or 1-2), then the other pair, and then sync the pairs to each other.

My intention to allow this to take place more effectively is to separate the 2 pairs of bottles with a mini ball valve, so that I can isolate each pair of carbs, then open the valve to connect all 4. I haven't seen this done, but seems like it would make it easier to accomplish the necessary steps.

Sound like a good idea?
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Old 12-28-2017, 05:58 PM   #2
Kreylyn
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Quote:
Originally Posted by Doc_speeder View Post
So I am going to build a DIY carb sync tool. The type with the 4 liquid bottles and hoses and such...you've all seen 'em.

I've never synced carbs before as this is my first multi cylinder carbed bike, but I see an issue with the typical diy manometers.

The correct method is to sync the "base pair" (off the top of my head I can't remember if that's 3-4 or 1-2), then the other pair, and then sync the pairs to each other.

My intention to allow this to take place more effectively is to separate the 2 pairs of bottles with a mini ball valve, so that I can isolate each pair of carbs, then open the valve to connect all 4. I haven't seen this done, but seems like it would make it easier to accomplish the necessary steps.

Sound like a good idea?
I found more than 2 bottles just wasn't really necessary and added a complication in use. If you sync a pair 1-2 or 3-4, I've not had them go out of sync switching around to do the other pair and then sync on the pairs. I always check as a final verification... but never had to go back and make further adjustments.

Krey
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Old 12-28-2017, 07:12 PM   #3
Doc_speeder
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Ok perfect that's even easier then! When you sync the pairs together does it matter if you use 2-3/1-4 etc? I think it shouldn't make any difference...
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Old 12-28-2017, 10:19 PM   #4
shpielers
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Quote:
Originally Posted by Kreylyn View Post
I found more than 2 bottles just wasn't really necessary and added a complication in use. If you sync a pair 1-2 or 3-4, I've not had them go out of sync switching around to do the other pair and then sync on the pairs. I always check as a final verification... but never had to go back and make further adjustments.

Krey
+1
I've usually done 3/4 then 1/2, but I have done it the other way before as well. Like Krey, I always double checked after done, never had an issue.
This way works but just saying...an actual sync tool is pretty nice...
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Old 12-29-2017, 12:47 PM   #5
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my sync tool involves a truck and a trip to a mechanic.... ive never been able to get it right. i can clean them all day long but if they need to be jetted or synced ive failed time and time again lol.
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Old 01-01-2018, 04:18 AM   #6
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While I have nothing too useful to offer, I can say that my mechanic has digital sync gauges. No sight glass/tubes, just a simple four-bank digital gauge. Very cool tool.
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