fancy nonstock carburators

Mike Hunt · #1 (**permalink**) 09-05-2009, 11:05 PM

what is the advantage of getting one of the "performance" carbs to replace the stock carb? i noticed that a lot of people here have them, maybe i should think about getting one as well?

foureasy · #2 (**permalink**) 09-05-2009, 11:46 PM

because they flow more air. with a bone stock motor under full throttle you will reach a point where the motor will stop accelerating, and you will hear a completely different exhaust note. that is where you ran out of carburetor. a bigger/more efficient carb will keep pulling. you won't lose any fuel efficiency unless you drive it differently. for a stock motor i highly reccomend a dellorto 14/14 SHA if you plan on joining the quest for speed, get the 16/16 SHA. you can use the stock manifold and throttle cable for both, but you will have to try a few different jets. don't misunderstand though, the 16/16 will not make your bike any faster than the 14/14 unless you need the airflow, (portwork). i can give you the jet size for the 16/16 at 2000' altitude with no filter if you like

kirk78400ta · #3 (**permalink**) 09-06-2009, 11:39 PM

Any chance you have the port work for 16-16 at 100' above sea level with a filter?

New to this! Suggestions on part sources?

I live in Houston Texas

Thanks!

foureasy · #4 (**permalink**) 09-06-2009, 11:54 PM

port size and port timing depend (in laymans terms) where in the rpm range you want to make power. when you port a motor, you are increasing the amount of air that the motor will need due to the increased rpm range. the only effect that port work will have on a motor, (other than a decrease in life span) will be the requirement of a larger carburetor

Mike Hunt · #5 (**permalink**) 09-07-2009, 12:30 AM

Quote:

Originally Posted by foureasy

because they flow more air. with a bone stock motor under full throttle you will reach a point where the motor will stop accelerating, and you will hear a completely different exhaust note. that is where you ran out of carburetor. a bigger/more efficient carb will keep pulling. you won't lose any fuel efficiency unless you drive it differently. for a stock motor i highly reccomend a dellorto 14/14 SHA if you plan on joining the quest for speed, get the 16/16 SHA. you can use the stock manifold and throttle cable for both, but you will have to try a few different jets. don't misunderstand though, the 16/16 will not make your bike any faster than the 14/14 unless you need the airflow, (portwork). i can give you the jet size for the 16/16 at 2000' altitude with no filter if you like

what does the "14/14 sha" and the "16/16 sha" refer to? whats the best place to get these?

foureasy · #6 (**permalink**) 09-07-2009, 01:27 AM

SHA : Dellorto Carburetors, And parts for you.

mekano · #7 (**permalink**) 09-07-2009, 05:18 AM

How about the SHA 15 15? Does it fit, is it suitable?
(I saw it in a store nearby the other day...)

foureasy · #8 (**permalink**) 09-07-2009, 10:35 AM

yes, all the sha's will fit. but you will have to mes with the jetting to get it perfect. it will be worth the extra effort.

Mike Hunt · #9 (**permalink**) 09-07-2009, 03:11 PM

how does the jet and needle sizing work? how does one find out what the dimensions are when all they specify is "size w6" or "#106"?

foureasy · #10 (**permalink**) 09-08-2009, 12:26 AM

there is no needle on the SHA. just an emulsion tube. what dimensions? you will need some tiny drill bits ( .020-.040") and some solder. it's really not that big of a deal