Well....at low rpm's and a wide open throttle....there is not much vacuum beneath the carb slide to pull the fuel up out of the float bowl.  So if it has to pull the fuel up 13mm......and you change that to 14mm.....it is gonna make a difference on how much fuel gets pulled up the jet.

Now the CV carb is going to help correct for some of that.....but raising or lowering the fuel level in the float bowl does make a small difference.

Here is a link to the article I qouted.....it is for the CV carb mounted on any motorcycle including 2 and 4 cylinder bikes.....so it is not specifically for the Savage:
http://www.zrxoa.org/webpages/techinfo/carb/carbtuning.html

Dave wrote on 03/05/14 at 12:00:40:



Okay, Dave, You said (So if it has to pull the fuel up 13mm......and you change that to 14mm) & I get this, in an "almost, kinda sorta" way,,BUT!!! (You KNEW there was a Biggo BUTT comin, didnt ya? )
What happens when Im running up or down a hill? Its no longer a vertical lift to get the fuel from the bowl to the venturi, I guess itd take a pretty good slope to tilt the tube from the bowl to venturi to make a MM change, IDK, Id hafta siddown w/ pencil & paper,, But seriously,,that would BE some fine tuning of jetting..
Okay, I get it, good enough to at least accept it as a tuning method.. But, I would never be the guy who would use it. I can see how a drag racer mite.

justin_o_guy2 wrote on 03/05/14 at 13:26:16:


paper aside and seat of the pants ruling...
Downhill a forward tilt of the pickup tube will reduce fuel delivery but due to less throttle, less is needed anyway.
An uphill will just about level out his RYCA tilted carb, shortening the lift and richening delivery.  More power scotty, thank you.

I picked up the carb kit and the float Friday. The petcock also arrived Friday from California!  I was pretty impressed.  I spent Friday night changing the petcock out and cleaning and repairing the carb. The new seat and needle valve valve went in fine but the new float would not swing freely with the pin inserted. I had checked the old float and believed it to be fine.  So I put everything back drained and refilled the bike with oil and fired it up. It seemed to be great.  I let it run a few minutes then shut it down and backed it half way off the lift to get a better angle to check the oil level. I let it set a few minutes and didn't turn off the petcock. Low and behold it began to leak fuel from the air filter.
 I am in the process of moving my shop back to my house so most of my tools are at my house. I shut off the petcock and removed the card and took it back to the house.  Saturday I got up and ran some errands for my wife then I took the rotary tool and cleaned up the mounting area on the new float and installed it and set it to the proper height.  It was so nice I decided to ride my other bike and install the carb later. Later in the day I went back and installed the carb and followed the same procedures. This time no leak.
 One note when I went to work on the bike I had to use the back entrance because the restaurant across the street was having a classic car cruise in and the entrance was blocked with classic cars. After I got it running I took it out and cruised around the block a few times among all the classic cars. Even among those great cars it really turned some heads. I took some pictures of the carb and petcock and I will post them tomorrow. Thanks for all the help.

I've been caught out by mystery leaks a couple time on my suzukis (I know, slow learner) and both times was actually the o ring that seals the brass needle seat to the carb body. duh. Change that fixed it both times. Also, the new needle on my savage needed a couple of days to settle down and work right with no drips. Shouldn't be, but there you go...

BTW, Dave thanks for the carb tuning tutorial. Didn't know that...