Yamaha RZV500R Carb Balancing

[ChequeredFlagRacing]

Rode it last year and it ran fine. Bought the air flow meter late 2019 to check air. Now I've got around to tuning the carbs. Left lower pot was hardly breathing. Last part of the video shows all four balanced

https://www.youtube.com/watch?v=LQt6VN_TNwU

[phildu31]

Idle is too high.
It should run fine at 1200 rpm and needle near the number 2 for the four carbs.

[ChequeredFlagRacing]

Idle is too high.
It should run fine at 1200 rpm and needle near the number 2 for the four carbs.

Idle to sort so not unduly worried. Will be rechecking air flow then I'll set idle

[phildu31]

Ok.
First of all, balance the two banks at full open throttle as in the manual.
Next synchronize the two carbs of one bank with the tool by adjusting the synchronizing screw.
Do the same for the other bank.
Finally adjust the two banks at idle equally with the idle screws.

[ChequeredFlagRacing]

Best get the book out then as the online video shows setting wide open after synchronizing

[phildu31]

Yes, you're right, you can do these in any order.
But you will find easier to set up full throttle before starting the engine
Then once engine started if you modify the synchronization in a carb bank, you'll have to check/adjust idle speed.

[shergar]

do you have to blank of behind the carbs first as per one of the other posts using the meter ?

[ChequeredFlagRacing]

I didn't

[Linx]

No.

[shergar]

what was the reason for IGYEE4 doing it ?

[phildu31]

what was the reason for IGYEE4 doing it ?

What post do you refer to ?
There is no member by this name ...

[shergar]

carb sync .
by lgyee4 » Sat Apr 11, 2009 7:33 pm

[phildu31]

Haha : the post dates from 2009 ... reason why the user doesn't exist anymore...
And there is no reason to blank of behind the carbs as it has already been answered.

[shergar]

thats great thanks . did you happen to see my new post on setting up carbs by any chance phil any ideas ?

[shergar]

when you set them with the meter and then give it a slight rev and test at the same time should all 4 readings still be the same ?