Carb syncing

starboy869 said:
How do you sync carbs on a bike that doesn't have carbs? hmmmm tick tock tick tock tick tock. maybe you should read a book and educate yourself on carbs and fuel inj.
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you have no idea what i was asking... good job to come on a post and throw an insult...

my question stands to the OP he mentioned that you have an f/i engine right? then why are u asking to use the carb tuner? or is it for general referance?
 
cbcanada said:
you have no idea what i was asking... good job to come on a post and throw an insult...

my question stands to the OP he mentioned that you have an f/i engine right? then why are u asking to use the carb tuner? or is it for general referance?
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Fuel injection is controlled by the computer. 'mapping' would be done with a laptop computer. Carb syncing/jetting is something you simply don't do on an fi bike. Seriously, hit Google or read a book.

Carbs are easier to tinker with, but fi is easier for the operator to twist the wrist and go.
 
hmmmmm, but I found this......

Q. My bike has fuel injection. Do I have to balance them?
Yes. You have to sync the throttle bodies in just the same way as you do with carburettors.
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[h=2]Fuel injection[/h]
For most bikes with fuel injection, you still have to balance your throttles. Carbtune II will do this as easily as it does for bikes with carburettors.
​
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found at carbtune.com


seems more reading is required.....
 
Rotten_Ronnie said:
Fuel injection is controlled by the computer. 'mapping' would be done with a laptop computer. Carb syncing/jetting is something you simply don't do on an fi bike. Seriously, hit Google or read a book.

Carbs are easier to tinker with, but fi is easier for the operator to twist the wrist and go.
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yes and when you pull the lever on the toilet it flushes right?

dude i know all this!!! obviously YOU are too dumb to understand the point of my question even though i repeated it.

instead of coming on here with your smart guy attititude , YOU need to get a book just to gain some common sense!
 
cbcanada said:
i thought the syncing was dine only on carbs,, f/i engines get synced too?
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Very similar. You balance the TB's. The steps are almost identical as you are trying to balance the intake vacuum between the TB's.
 
cbcanada said:
yes and when you pull the lever on the toilet it flushes right?

dude i know all this!!! obviously YOU are too dumb to understand the point of my question even though i repeated it.

instead of coming on here with your smart guy attititude , YOU need to get a book just to gain some common sense!
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Grow up and be civil at least.

I've learned a lot about carb tuning from this thread, and a bit more about fi too.
 
why would you leave the spark plugs in, when doing a compression test, i would want the crank to freewheel as fast as possible for the best reading. plus less draw on the battery, right?
 
Stewart said:
why would you leave the spark plugs in, when doing a compression test, i would want the crank to freewheel as fast as possible for the best reading. plus less draw on the battery, right?
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Be sure the battery is in a good state of charge and remains so throughout the compression test.
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I asked the same question early in my apprenticeship.

Compression values supplied by manufacturers / clymer / haynes are always supplied assuming that multiple cylinder engines have the spark plugs installed. For their values to be of any use, we also must test consistently.

Typical cranking speed for a gasoline engine is roughly 4-600 rpm (depending on starter type, battery strength). If the crank is allowed to 'freewheel' (all plugs removed), engine rpm will be much higher (nearly double) than if the plugs are installed. This can disguise low compression (if you have blow by due to worn rings/piston/polished cylinder, which could easily be a consistent fault in each cylinder).

Also, starter motors are series wound motors. Unlike parallel or shunt wound motors, they have no means of limiting overspeed. Running a series wound motor at high rpm (cranking starter while battery is on a charger) without a load on it (spark plugs removed) can cause the commutator segments to separate from the armature and scatter the brush gear all over the shop floor... and ceiling :confused2:
 
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@ cbcanada, did u ever end up fixing your issue, I thought I saw a post with u saying u were having a similar problem? Anyway, as I mentioned earlier, Brian P helped me out with my carbs in a different thread http://www.gtamotorcycle.com/vbforu...hain-Questions/page2&highlight=chain+sprocket (I know, the thread started one way and spawned something completely different,lol) but I was focused more on a valve clearance adjustment so most of the explaining dealt with that. I asked the question here because I find that people here explain alot of the stuff to me in a way that I dont require a mechanic background to understand. I know I can search around and find stuff at other places, but here Im here most of time anyway, so its nice to be able to come here and find something new I didnt know pop up from time to time...heres some pics from my original removal.
63f2e722-0b8f-6cfe.jpg
63f2e722-ea31-2211.jpg
63f2e722-4459-08c2.jpg
63f2e722-6b5a-6765.jpg
63f2e722-6011-4ce2.jpg
63f2e722-6b9b-f67e.jpg
Sorry if the sizes show up huge, Idk why its doing that:dontknow:
 
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starboy869 said:
How do you sync carbs on a bike that doesn't have carbs? hmmmm tick tock tick tock tick tock. maybe you should read a book and educate yourself on carbs and fuel inj.
Click to expand...

What's with the ****** attitude? If you don't have anything to contribute, don't post.
 
skip said:
Very similar. You balance the TB's. The steps are almost identical as you are trying to balance the intake vacuum between the TB's.
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A useful answer. TB=Throttle Bodies..the throttle blade still controls how much air goes into each cylinder and needs to be balanced with the other throttle bodies.
 
skip said:
Very similar. You balance the TB's. The steps are almost identical as you are trying to balance the intake vacuum between the TB's.
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Would you use the same gear to do the sync on F/I? Such as the tool in post #15 for example?
 
JonnyWyshbone said:
Would you use the same gear to do the sync on F/I? Such as the tool in post #15 for example?
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Yes. I use the same setup to sync the carbs on my FZR as I did on the TBs of my R6 and now my wee-strom. Most manuals for FI bikes will tell you the vacuum that there is suppose to be after the TB and the air adjust screw is on the TB's themselves like F/A screws on carbs. At the end of the day you are trying to get the vacuum pressure the same in each intake manifold so each cylinder is sucking in the same amount of air/fuel.

edit - even direct injection you still do this so each cylinder is getting the same amount of air.
 
Crap, I thought it was the one with the throttle sensor on it. But what I meant was can any carb be used as a master or does it have to be a carb specifically made to be a master?
 
Just a tip for people who are new. Make sure u document everything. Each screw (pilot, idle, etc) how many turns in. You normally do this before you touch them. Just incase things do not work out you can revert to these changes. I've seen some ppl try to mess with their carbs and never get it back to original. That's where the fun begins (sarcasm)
 
JonnyWyshbone said:
@ cbcanada, did u ever end up fixing your issue, I thought I saw a post with u saying u were having a similar problem? Anyway, as I mentioned earlier, Brian P helped me out with my carbs in a different thread http://www.gtamotorcycle.com/vbforu...hain-Questions/page2&highlight=chain+sprocket (I know, the thread started one way and spawned something completely different,lol) but I was focused more on a valve clearance adjustment so most of the explaining dealt with that. I asked the question here because I find that people here explain alot of the stuff to me in a way that I dont require a mechanic background to understand. I know I can search around and find stuff at other places, but here Im here most of time anyway, so its nice to be able to come here and find something new I didnt know pop up from time to time...heres some pics from my original removal.
63f2e722-0b8f-6cfe.jpg
63f2e722-ea31-2211.jpg
63f2e722-4459-08c2.jpg
63f2e722-6b5a-6765.jpg
63f2e722-6011-4ce2.jpg
63f2e722-6b9b-f67e.jpg
Sorry if the sizes show up huge, Idk why its doing that:dontknow:
Click to expand...

yeah dude i fixed her but it got worse before better, my cylinders were flooded with gas at one point... all fixed now and in the end i ended up learning a lot
 
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