Carb Syncing Problem

[Gulrok]

So.. I had an issue with the carb sync. It mainly had to do with the vacuum on Cylinder #4.

I'm having an issue that the sync just won't line up. I pulled the carbs to clean but found they were basically spotless on the inside, I still ended up rebuilding the #4 carb just because I was in there when I tore it apart. Thats when I found it was spotless.


Fast forward to reinstalling... I'm wondering if if when I pulled the carbs if one of the boots is leaking. I'm getting about 5-10 mmHG compared to the normal on the other cylinders... is there something I could have incorrectly swapped around on the carb that would cause lower vacuum?

 

[dannymax]

How does it run? Could it be the gauge?

 

[Gulrok]

How does it run? Could it be the gauge?

Won't go above 4500 rpm.

Definitely not the gauge if on the other cylinders it reads much higher.

 

[marsmax85]

use a propane torch unlit of course and go along all boots to see if increases idle you can use wd40 also ..

 

[Gulrok]

Already tried. Didn't get a noticeable increase.

 

[Traumahawk]

Won't go above 4500 rpm.

Definitely not the gauge if on the other cylinders it reads much higher.

When it wont go above 4500 rpm, is the airbox in place?

 

[Gulrok]

When it wont go above 4500 rpm, is the airbox in place?

negative.

 

[Traumahawk]

negative.

Thats the first issue. With the carbs in the stock configuration, without the airbox in place, you allow TOO MUCH air into the carbs, and they run like crap. There is a reason why the airbox has small openings on the side to allow a specific amount of air into the carbs.

 

[Gulrok]

Thats the first issue. With the carbs in the stock configuration, without the airbox in place, you allow TOO MUCH air into the carbs, and they run like crap. There is a reason why the airbox has small openings on the side to allow a specific amount of air into the carbs.

Thats my issue with the reving.

Thanks,