[pournstarr]

one question about all this... what, other than the butterfly valves, affects the flow in each carb? i mean, if the floats are off, is synching the carbs a way to make up for this? or if the air/fuel screws were off, again would synching the carbs like this make up for it? guess i'm just trying to understand the theory of how the whole system works inside there. i just took them apart the other day and cleaned them in that carb cleaner dip. worked pretty well... i still had to use a spray can to clean out the pilot jets tho. but again... if one was dirtier than the rest, would synching the carbs balance this out? (like if one was clogged, the butterfly would be a bit more closed on that carb to equalize the ratio?) and one last thing... i believe someone else on here asked about the different rpm readings... anyone have an answer to that? or... (apparently i like using periods in my posts) once they're balanced at around 1800, should you be able to open up the throttle and have the fluid still balanced? thats the end of my one question. thanks.

[steves]

The butterflies are not the floats. They are different.

[Kreylyn]

one question about all this... what, other than the butterfly valves, affects the flow in each carb? i mean, if the floats are off, is synching the carbs a way to make up for this? or if the air/fuel screws were off, again would synching the carbs like this make up for it? guess i'm just trying to understand the theory of how the whole system works inside there. i just took them apart the other day and cleaned them in that carb cleaner dip. worked pretty well... i still had to use a spray can to clean out the pilot jets tho. but again... if one was dirtier than the rest, would synching the carbs balance this out? (like if one was clogged, the butterfly would be a bit more closed on that carb to equalize the ratio?) and one last thing... i believe someone else on here asked about the different rpm readings... anyone have an answer to that? or... (apparently i like using periods in my posts) once they're balanced at around 1800, should you be able to open up the throttle and have the fluid still balanced? thats the end of my one question. thanks.

Minor variances can be tuned with a sync, but it won't fix major issues or way off settings.

The primary point of a sync is to equalize the vacuum between all 4 carbs by adjusting the amount of air allowed to flow into them by the butterflies. Vacuum is created bythe motor turning over (valves opening, pistons pumping, gasses pushed out the exhaust).

The only way for carb settings like the float heights to really have an effect on the sync... is if they are so far out of adjustment between others that the cylinder won't run/burn right. This is why before doing a sync, you need to make sure all 4 are working.

Krey

[tejasandre]

Can this be done with a single vacume Gage? Check one then check 2 adjust, repeat?

[dsmisfits]

Good write up from the Ninja 250 How To site

See the Two Bottle Method Section:

http://faq.ninja250.org/wiki/How_do_I_synchronize_the_carburetors%3F

[Black_peter]

Can this be done with a single vacume Gage? Check one then check 2 adjust, repeat?

It can, but it would really take a long time. Actually if you are going to use a gauge I would strongly suggest using only one and doing them one at a time.

However for a few dollars follow misfit's link...

See the Two Bottle Method Section:
http://faq.ninja250.org/wiki/How_do_...carburetors%3F

That is nice, it covers all the DIY methods..

[cmurdah]

i must say i used krey's idea and it worked like a charm!

[stonefry]

I am a newb and I had heard about carb syncing and even seen a few videos on how to do it with homemade tools. It never really clicked until I read through this thread. Great stuff in here.

[Malarky112]

Bumping....I know its old but it has a lot of good info for homemade syncing. I am surprised its not a sticky.

[arsenic]

We don't need to make it a sticky. There is this button you can hit to search for stuff like this.

[Black_peter]

yeah you sticky everything and it defeats the purpose..

[ManQu]

I got sticky but it aint glue......